diff --git a/doc/flux_refineck/checker/errors/struct.CheckerError.html b/doc/flux_refineck/checker/errors/struct.CheckerError.html index 2c5630e66e..c18fed42d6 100644 --- a/doc/flux_refineck/checker/errors/struct.CheckerError.html +++ b/doc/flux_refineck/checker/errors/struct.CheckerError.html @@ -1,7 +1,7 @@ CheckerError in flux_refineck::checker::errors - Rust
flux_refineck::checker::errors

Struct CheckerError

Source 
pub struct CheckerError {
-    kind: InferErr,
+    kind: InferErr,
     span: Span,
-}

Fields§

§kind: InferErr§span: Span

Implementations§

Source§

impl CheckerError

Source

pub fn opaque_struct(def_id: DefId, span: Span) -> Self

Source

pub fn emit( +}

Fields§

§kind: InferErr§span: Span

Implementations§

Source§

impl CheckerError

Source

pub fn opaque_struct(def_id: DefId, span: Span) -> Self

Source

pub fn emit( self, genv: GlobalEnv<'_, '_>, fn_def_id: MaybeExternId, diff --git a/doc/flux_refineck/checker/errors/trait.ResultExt.html b/doc/flux_refineck/checker/errors/trait.ResultExt.html index a0bacbc1e7..57d5959f09 100644 --- a/doc/flux_refineck/checker/errors/trait.ResultExt.html +++ b/doc/flux_refineck/checker/errors/trait.ResultExt.html @@ -2,4 +2,4 @@ // Required method fn with_span(self, span: Span) -> Result<T, CheckerError>; }

Required Methods§

Source

fn with_span(self, span: Span) -> Result<T, CheckerError>

Implementations on Foreign Types§

Source§

impl<T, E> ResultExt<T> for Result<T, E>
where - E: Into<InferErr>,

Source§

fn with_span(self, span: Span) -> Result<T, CheckerError>

Implementors§

\ No newline at end of file + E: Into<InferErr>,
Source§

fn with_span(self, span: Span) -> Result<T, CheckerError>

Implementors§

\ No newline at end of file diff --git a/doc/flux_refineck/checker/fn.check_fn_subtyping.html b/doc/flux_refineck/checker/fn.check_fn_subtyping.html index 0f716a63b7..4068854c22 100644 --- a/doc/flux_refineck/checker/fn.check_fn_subtyping.html +++ b/doc/flux_refineck/checker/fn.check_fn_subtyping.html @@ -1,12 +1,12 @@ check_fn_subtyping in flux_refineck::checker - Rust
flux_refineck::checker

Function check_fn_subtyping

Source 
fn check_fn_subtyping(
-    infcx: &mut InferCtxt<'_, '_, '_>,
+    infcx: &mut InferCtxt<'_, '_, '_>,
     def_id: &DefId,
     sub_sig: EarlyBinder<PolyFnSig>,
     sub_args: &[GenericArg],
     super_sig: EarlyBinder<PolyFnSig>,
     super_args: Option<(&GenericArgs, &RefineArgs)>,
     span: Span,
-) -> InferResult
Expand description

The function check_fn_subtyping does a function subtyping check between +) -> InferResult

Expand description

The function check_fn_subtyping does a function subtyping check between the sub-type (T_f) corresponding to the type of def_id @ args and the super-type (T_g) corresponding to the oblig_sig. This subtyping is handled as akin to the code

diff --git a/doc/flux_refineck/checker/fn.fold_local_ptrs.html b/doc/flux_refineck/checker/fn.fold_local_ptrs.html index 534a80b55b..4d430cd232 100644 --- a/doc/flux_refineck/checker/fn.fold_local_ptrs.html +++ b/doc/flux_refineck/checker/fn.fold_local_ptrs.html @@ -1,8 +1,8 @@ fold_local_ptrs in flux_refineck::checker - Rust
flux_refineck::checker

Function fold_local_ptrs

Source 
fn fold_local_ptrs(
-    infcx: &mut InferCtxt<'_, '_, '_>,
+    infcx: &mut InferCtxt<'_, '_, '_>,
     env: &mut TypeEnv<'_>,
     span: Span,
-) -> InferResult
Expand description

Fold local pointers implements roughly a rule like the following (for all local pointers) +) -> InferResult

Expand description

Fold local pointers implements roughly a rule like the following (for all local pointers) that converts the local pointers created via unfold_local_ptrs back into &mut.

      T1 <: T2
 --------------------- [local-fold]
diff --git a/doc/flux_refineck/checker/fn.infer_under_mut_ref_hack.html b/doc/flux_refineck/checker/fn.infer_under_mut_ref_hack.html
index 5248c5817b..28d28da4b5 100644
--- a/doc/flux_refineck/checker/fn.infer_under_mut_ref_hack.html
+++ b/doc/flux_refineck/checker/fn.infer_under_mut_ref_hack.html
@@ -1,5 +1,5 @@
 infer_under_mut_ref_hack in flux_refineck::checker - Rust
flux_refineck::checker
Function infer_under_mut_ref_hack
Source 
fn infer_under_mut_ref_hack(
-    rcx: &mut InferCtxt<'_, '_, '_>,
+    rcx: &mut InferCtxt<'_, '_, '_>,
     actuals: &[Ty],
     fn_sig: EarlyBinder<&PolyFnSig>,
 ) -> Vec<Ty>
Expand description
HACK(nilehmann) This let us infer parameters under mutable references for the simple case
diff --git a/doc/flux_refineck/checker/fn.snapshot_at_dominator.html b/doc/flux_refineck/checker/fn.snapshot_at_dominator.html
index aafcd17a6b..ea55c0686f 100644
--- a/doc/flux_refineck/checker/fn.snapshot_at_dominator.html
+++ b/doc/flux_refineck/checker/fn.snapshot_at_dominator.html
@@ -1,5 +1,5 @@
 snapshot_at_dominator in flux_refineck::checker - Rust
flux_refineck::checker
Function snapshot_at_dominator
Source 
fn snapshot_at_dominator<'a>(
     body: &Body<'_>,
-    snapshots: &'a IndexVec<BasicBlock, Option<Snapshot>>,
+    snapshots: &'a IndexVec<BasicBlock, Option<Snapshot>>,
     bb: BasicBlock,
-) -> &'a Snapshot

\ No newline at end of file
+) -> &'a Snapshot
\ No newline at end of file diff --git a/doc/flux_refineck/checker/fn.trait_impl_subtyping.html b/doc/flux_refineck/checker/fn.trait_impl_subtyping.html index aa990cba02..a645b69eb3 100644 --- a/doc/flux_refineck/checker/fn.trait_impl_subtyping.html +++ b/doc/flux_refineck/checker/fn.trait_impl_subtyping.html @@ -3,6 +3,6 @@ def_id: LocalDefId, opts: InferOpts, span: Span, -) -> InferResult<Option<InferCtxtRoot<'genv, 'tcx>>>
Expand description

Trait subtyping check, which makes sure that the type for an impl method (def_id) +) -> InferResult<Option<InferCtxtRoot<'genv, 'tcx>>>

Expand description

Trait subtyping check, which makes sure that the type for an impl method (def_id) is a subtype of the corresponding trait method.

\ No newline at end of file diff --git a/doc/flux_refineck/checker/fn.unfold_local_ptrs.html b/doc/flux_refineck/checker/fn.unfold_local_ptrs.html index 08236d26e4..73e7a162dd 100644 --- a/doc/flux_refineck/checker/fn.unfold_local_ptrs.html +++ b/doc/flux_refineck/checker/fn.unfold_local_ptrs.html @@ -1,9 +1,9 @@ unfold_local_ptrs in flux_refineck::checker - Rust
flux_refineck::checker

Function unfold_local_ptrs

Source 
fn unfold_local_ptrs(
-    infcx: &mut InferCtxt<'_, '_, '_>,
+    infcx: &mut InferCtxt<'_, '_, '_>,
     env: &mut TypeEnv<'_>,
     fn_sig: &EarlyBinder<PolyFnSig>,
     actuals: &[Ty],
-) -> InferResult<Vec<Ty>>
Expand description

Temporarily (around a function call) convert an &mut to an &strg to allow for the call to be +) -> InferResult<Vec<Ty>>

Expand description

Temporarily (around a function call) convert an &mut to an &strg to allow for the call to be checked. This is done by unfolding the &mut into a local pointer at the call-site and then folding the pointer back into the &mut upon return. See also fold_local_ptrs.

diff --git a/doc/flux_refineck/checker/struct.Checker.html b/doc/flux_refineck/checker/struct.Checker.html index caf25eedcf..c5839daa00 100644 --- a/doc/flux_refineck/checker/struct.Checker.html +++ b/doc/flux_refineck/checker/struct.Checker.html @@ -5,13 +5,13 @@ body: &'ck Body<'tcx>, resume_ty: Option<Ty>, output: Binder<FnOutput>, - snapshots: IndexVec<BasicBlock, Option<Snapshot>>, + snapshots: IndexVec<BasicBlock, Option<Snapshot>>, visited: BitSet<BasicBlock>, queue: WorkQueue<'ck>, default_refiner: Refiner<'genv, 'tcx>, }

Fields§

§genv: GlobalEnv<'genv, 'tcx>§def_id: LocalDefId

LocalDefId of the function-like item being checked.

§inherited: Inherited<'ck, M>§body: &'ck Body<'tcx>§resume_ty: Option<Ty>

The type used for the resume argument if we are checking a generator.

-
§output: Binder<FnOutput>§snapshots: IndexVec<BasicBlock, Option<Snapshot>>

A snapshot of the refinement context at the end of the basic block after applying the effects +

§output: Binder<FnOutput>§snapshots: IndexVec<BasicBlock, Option<Snapshot>>

A snapshot of the refinement context at the end of the basic block after applying the effects of the terminator.

§visited: BitSet<BasicBlock>§queue: WorkQueue<'ck>§default_refiner: Refiner<'genv, 'tcx>

Implementations§

Source§

impl<'ck, 'genv, 'tcx> Checker<'ck, 'genv, 'tcx, ShapeMode>

Source

pub(crate) fn run_in_shape_mode( genv: GlobalEnv<'genv, 'tcx>, @@ -24,31 +24,31 @@ ghost_stmts: &'ck UnordMap<LocalDefId, GhostStatements>, bb_env_shapes: ShapeResult, opts: InferOpts, -) -> Result<InferCtxtRoot<'genv, 'tcx>, CheckerError>

Source§

impl<'ck, 'genv, 'tcx, M: Mode> Checker<'ck, 'genv, 'tcx, M>

Source

fn run( - infcx: InferCtxt<'_, 'genv, 'tcx>, +) -> Result<InferCtxtRoot<'genv, 'tcx>, CheckerError>

Source§

impl<'ck, 'genv, 'tcx, M: Mode> Checker<'ck, 'genv, 'tcx, M>

Source

fn run( + infcx: InferCtxt<'_, 'genv, 'tcx>, def_id: LocalDefId, inherited: Inherited<'ck, M>, poly_sig: PolyFnSig, ) -> Result<(), CheckerError>

Source

fn check_basic_block( &mut self, - infcx: InferCtxt<'_, 'genv, 'tcx>, + infcx: InferCtxt<'_, 'genv, 'tcx>, env: TypeEnv<'_>, bb: BasicBlock, ) -> Result<(), CheckerError>

Source

fn check_assign_ty( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, env: &mut TypeEnv<'_>, place: &Place, ty: Ty, span: Span, -) -> InferResult

Source

fn check_statement( +) -> InferResult

Source

fn check_statement( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, stmt: &Statement, ) -> Result<(), CheckerError>

Source

fn is_exit_block(&self, bb: BasicBlock) -> bool

Source

fn check_terminator( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, terminator: &Terminator<'tcx>, last_stmt_span: Option<Span>, @@ -60,12 +60,12 @@

Source

fn check_ret( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, span: Span, ) -> Result<(), CheckerError>

Source

fn check_call( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, span: Span, callee_def_id: Option<DefId>, @@ -74,118 +74,118 @@ actuals: &[Ty], ) -> Result<Ty, CheckerError>

Source

fn check_coroutine_obligations( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, obligs: Vec<Binder<CoroutineObligPredicate>>, ) -> Result<(), CheckerError>

Source

fn check_fn_trait_clause( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, fn_trait_pred: &FnTraitPredicate, span: Span, ) -> Result<(), CheckerError>

Source

fn check_closure_clauses( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, clauses: &[Binder<FnTraitPredicate>], span: Span, ) -> Result<(), CheckerError>

Source

fn check_assert( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, env: &mut TypeEnv<'_>, terminator_span: Span, cond: &Operand, expected: bool, msg: &AssertKind, -) -> InferResult<Guard>

Source

fn check_if(discr_ty: &Ty, targets: &SwitchTargets) -> Vec<(BasicBlock, Guard)>

Checks conditional branching as in a match statement. SwitchTargets contains a list of branches - the exact bit value which is being compared and the block to jump to. Using the conditionals, each branch can be checked using the new control flow information. +) -> InferResult<Guard>

Source

fn check_if(discr_ty: &Ty, targets: &SwitchTargets) -> Vec<(BasicBlock, Guard)>

Checks conditional branching as in a match statement. SwitchTargets contains a list of branches - the exact bit value which is being compared and the block to jump to. Using the conditionals, each branch can be checked using the new control flow information. See https://github.com/flux-rs/flux/pull/840#discussion_r1786543174

Source

fn check_match( discr_ty: &Ty, targets: &SwitchTargets, ) -> Vec<(BasicBlock, Guard)>

Source

fn check_successors( &mut self, - infcx: InferCtxt<'_, 'genv, 'tcx>, + infcx: InferCtxt<'_, 'genv, 'tcx>, env: TypeEnv<'_>, from: BasicBlock, terminator_span: Span, successors: Vec<(BasicBlock, Guard)>, ) -> Result<(), CheckerError>

Source

fn check_goto( &mut self, - infcx: InferCtxt<'_, 'genv, 'tcx>, + infcx: InferCtxt<'_, 'genv, 'tcx>, env: TypeEnv<'_>, span: Span, target: BasicBlock, ) -> Result<(), CheckerError>

Source

fn check_rvalue( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, stmt_span: Span, rvalue: &Rvalue, ) -> Result<Ty, CheckerError>

Source

fn check_len( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, env: &mut TypeEnv<'_>, stmt_span: Span, place: &Place, ) -> Result<Ty, CheckerError>

Source

fn check_binary_op( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, env: &mut TypeEnv<'_>, stmt_span: Span, bin_op: BinOp, op1: &Operand, op2: &Operand, -) -> InferResult<Ty>

Source

fn check_nullary_op(&self, null_op: NullOp, _ty: &Ty) -> Ty

Source

fn check_unary_op( +) -> InferResult<Ty>

Source

fn check_nullary_op(&self, null_op: NullOp, _ty: &Ty) -> Ty

Source

fn check_unary_op( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, stmt_span: Span, un_op: UnOp, op: &Operand, -) -> InferResult<Ty>

Source

fn check_mk_array( +) -> InferResult<Ty>

Source

fn check_mk_array( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, stmt_span: Span, args: &[Ty], arr_ty: Ty, -) -> InferResult<Ty>

Source

fn check_cast( +) -> InferResult<Ty>

Source

fn check_cast( &self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, stmt_span: Span, kind: CastKind, from: &Ty, to: &Ty, -) -> InferResult<Ty>

Source

fn discr_to_int_cast(adt_def: &AdtDef, bty: BaseTy) -> Ty

Source

fn check_unsize_cast( +) -> InferResult<Ty>

Source

fn discr_to_int_cast(adt_def: &AdtDef, bty: BaseTy) -> Ty

Source

fn check_unsize_cast( &self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, span: Span, src: &Ty, dst: &Ty, -) -> InferResult<Ty>

Source

fn check_operands( +) -> InferResult<Ty>

Source

fn check_operands( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, span: Span, operands: &[Operand], -) -> InferResult<Vec<Ty>>

Source

fn check_operand( +) -> InferResult<Vec<Ty>>

Source

fn check_operand( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, env: &mut TypeEnv<'_>, span: Span, operand: &Operand, -) -> InferResult<Ty>

Source

fn check_constant(&mut self, c: &Constant) -> QueryResult<Ty>

Source

fn check_ghost_statements_at( +) -> InferResult<Ty>

Source

fn check_constant(&mut self, c: &Constant) -> QueryResult<Ty>

Source

fn check_ghost_statements_at( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, point: Point, span: Span, ) -> Result<(), CheckerError>

Source

fn check_ghost_statement( &mut self, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, env: &mut TypeEnv<'_>, stmt: &GhostStatement, span: Span, -) -> InferResult

Source

fn snapshot_at_dominator(&self, bb: BasicBlock) -> &Snapshot

Source

fn dominators(&self) -> &'ck Dominators<BasicBlock>

Source

fn ghost_stmts(&self) -> &'ck GhostStatements

Source

fn refine_default(&self, ty: &Ty) -> QueryResult<Ty>

Source

fn refine_with_holes(&self, ty: &Ty) -> QueryResult<Ty>

Auto Trait Implementations§

§

impl<'ck, 'genv, 'tcx, M> Freeze for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> !RefUnwindSafe for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> !Send for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> !Sync for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> Unpin for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> !UnwindSafe for Checker<'ck, 'genv, 'tcx, M>

Blanket Implementations§

Source§

impl<T> Any for T
where +) -> InferResult

Source

fn snapshot_at_dominator(&self, bb: BasicBlock) -> &Snapshot

Source

fn dominators(&self) -> &'ck Dominators<BasicBlock>

Source

fn ghost_stmts(&self) -> &'ck GhostStatements

Source

fn refine_default(&self, ty: &Ty) -> QueryResult<Ty>

Source

fn refine_with_holes(&self, ty: &Ty) -> QueryResult<Ty>

Auto Trait Implementations§

§

impl<'ck, 'genv, 'tcx, M> Freeze for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> !RefUnwindSafe for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> !Send for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> !Sync for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> Unpin for Checker<'ck, 'genv, 'tcx, M>

§

impl<'ck, 'genv, 'tcx, M> !UnwindSafe for Checker<'ck, 'genv, 'tcx, M>

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

diff --git a/doc/flux_refineck/checker/struct.RefineMode.html b/doc/flux_refineck/checker/struct.RefineMode.html index 967964e2b0..a01b3ef639 100644 --- a/doc/flux_refineck/checker/struct.RefineMode.html +++ b/doc/flux_refineck/checker/struct.RefineMode.html @@ -2,11 +2,11 @@ bb_envs: FxHashMap<LocalDefId, FxHashMap<BasicBlock, BasicBlockEnv>>, }

Fields§

§bb_envs: FxHashMap<LocalDefId, FxHashMap<BasicBlock, BasicBlockEnv>>

Trait Implementations§

Source§

impl Mode for RefineMode

Source§

const NAME: &str = "refine"

Source§

fn enter_basic_block<'ck, 'genv, 'tcx>( ck: &mut Checker<'ck, 'genv, 'tcx, RefineMode>, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, bb: BasicBlock, ) -> TypeEnv<'ck>

Source§

fn check_goto_join_point( ck: &mut Checker<'_, '_, '_, RefineMode>, - infcx: InferCtxt<'_, '_, '_>, + infcx: InferCtxt<'_, '_, '_>, env: TypeEnv<'_>, terminator_span: Span, target: BasicBlock, diff --git a/doc/flux_refineck/checker/struct.ShapeMode.html b/doc/flux_refineck/checker/struct.ShapeMode.html index c9a9d3cd55..2df8bcf73e 100644 --- a/doc/flux_refineck/checker/struct.ShapeMode.html +++ b/doc/flux_refineck/checker/struct.ShapeMode.html @@ -2,11 +2,11 @@ bb_envs: FxHashMap<LocalDefId, FxHashMap<BasicBlock, BasicBlockEnvShape>>, }

Fields§

§bb_envs: FxHashMap<LocalDefId, FxHashMap<BasicBlock, BasicBlockEnvShape>>

Trait Implementations§

Source§

impl Mode for ShapeMode

Source§

const NAME: &str = "shape"

Source§

fn enter_basic_block<'ck, 'genv, 'tcx>( ck: &mut Checker<'ck, 'genv, 'tcx, ShapeMode>, - _infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + _infcx: &mut InferCtxt<'_, 'genv, 'tcx>, bb: BasicBlock, ) -> TypeEnv<'ck>

Source§

fn check_goto_join_point<'genv, 'tcx>( ck: &mut Checker<'_, 'genv, 'tcx, ShapeMode>, - _: InferCtxt<'_, 'genv, 'tcx>, + _: InferCtxt<'_, 'genv, 'tcx>, env: TypeEnv<'_>, _: Span, target: BasicBlock, diff --git a/doc/flux_refineck/checker/struct.ShapeResult.html b/doc/flux_refineck/checker/struct.ShapeResult.html index 8bdefb11ba..23755dff64 100644 --- a/doc/flux_refineck/checker/struct.ShapeResult.html +++ b/doc/flux_refineck/checker/struct.ShapeResult.html @@ -1,7 +1,7 @@ ShapeResult in flux_refineck::checker - Rust
flux_refineck::checker

Struct ShapeResult

Source 
pub(crate) struct ShapeResult(FxHashMap<LocalDefId, FxHashMap<BasicBlock, BasicBlockEnvShape>>);
Expand description

The result of running the shape phase.

Tuple Fields§

§0: FxHashMap<LocalDefId, FxHashMap<BasicBlock, BasicBlockEnvShape>>

Implementations§

Source§

impl ShapeResult

Source

fn into_bb_envs( self, - infcx: &mut InferCtxtRoot<'_, '_>, + infcx: &mut InferCtxtRoot<'_, '_>, ) -> FxHashMap<LocalDefId, FxHashMap<BasicBlock, BasicBlockEnv>>

Auto Trait Implementations§

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where diff --git a/doc/flux_refineck/checker/trait.Mode.html b/doc/flux_refineck/checker/trait.Mode.html index 5aa1b50dce..c16df1d5c0 100644 --- a/doc/flux_refineck/checker/trait.Mode.html +++ b/doc/flux_refineck/checker/trait.Mode.html @@ -4,12 +4,12 @@ // Required methods fn enter_basic_block<'ck, 'genv, 'tcx>( ck: &mut Checker<'ck, 'genv, 'tcx, Self>, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, bb: BasicBlock, ) -> TypeEnv<'ck>; fn check_goto_join_point<'genv, 'tcx>( ck: &mut Checker<'_, 'genv, 'tcx, Self>, - infcx: InferCtxt<'_, 'genv, 'tcx>, + infcx: InferCtxt<'_, 'genv, 'tcx>, env: TypeEnv<'_>, terminator_span: Span, target: BasicBlock, @@ -17,11 +17,11 @@ fn clear(ck: &mut Checker<'_, '_, '_, Self>, bb: BasicBlock); }

Required Associated Constants§

Source

const NAME: &str

Required Methods§

Source

fn enter_basic_block<'ck, 'genv, 'tcx>( ck: &mut Checker<'ck, 'genv, 'tcx, Self>, - infcx: &mut InferCtxt<'_, 'genv, 'tcx>, + infcx: &mut InferCtxt<'_, 'genv, 'tcx>, bb: BasicBlock, ) -> TypeEnv<'ck>

Source

fn check_goto_join_point<'genv, 'tcx>( ck: &mut Checker<'_, 'genv, 'tcx, Self>, - infcx: InferCtxt<'_, 'genv, 'tcx>, + infcx: InferCtxt<'_, 'genv, 'tcx>, env: TypeEnv<'_>, terminator_span: Span, target: BasicBlock, diff --git a/doc/flux_refineck/fn.check_fn.html b/doc/flux_refineck/fn.check_fn.html index 41deabd451..3b50c09f3d 100644 --- a/doc/flux_refineck/fn.check_fn.html +++ b/doc/flux_refineck/fn.check_fn.html @@ -1,5 +1,5 @@ check_fn in flux_refineck - Rust
flux_refineck

Function check_fn

Source 
pub fn check_fn(
     genv: GlobalEnv<'_, '_>,
-    cache: &mut FixQueryCache,
+    cache: &mut FixQueryCache,
     def_id: MaybeExternId,
 ) -> Result<(), ErrorGuaranteed>
\ No newline at end of file diff --git a/doc/flux_refineck/fn.report_errors.html b/doc/flux_refineck/fn.report_errors.html index 361a3daf8c..669327bab9 100644 --- a/doc/flux_refineck/fn.report_errors.html +++ b/doc/flux_refineck/fn.report_errors.html @@ -1,4 +1,4 @@ report_errors in flux_refineck - Rust
flux_refineck

Function report_errors

Source 
pub(crate) fn report_errors(
     genv: GlobalEnv<'_, '_>,
-    errors: Vec<Tag>,
+    errors: Vec<Tag>,
 ) -> Result<(), ErrorGuaranteed>
\ No newline at end of file diff --git a/doc/flux_refineck/fn.report_fixpoint_errors.html b/doc/flux_refineck/fn.report_fixpoint_errors.html index 90786b891a..660e62ad99 100644 --- a/doc/flux_refineck/fn.report_fixpoint_errors.html +++ b/doc/flux_refineck/fn.report_fixpoint_errors.html @@ -1,5 +1,5 @@ report_fixpoint_errors in flux_refineck - Rust
flux_refineck

Function report_fixpoint_errors

Source 
pub(crate) fn report_fixpoint_errors(
     genv: GlobalEnv<'_, '_>,
     local_id: LocalDefId,
-    errors: Vec<Tag>,
+    errors: Vec<Tag>,
 ) -> Result<(), ErrorGuaranteed>
\ No newline at end of file diff --git a/doc/flux_refineck/invariants/fn.check_invariant.html b/doc/flux_refineck/invariants/fn.check_invariant.html index ba76c88208..1fcc8da502 100644 --- a/doc/flux_refineck/invariants/fn.check_invariant.html +++ b/doc/flux_refineck/invariants/fn.check_invariant.html @@ -1,6 +1,6 @@ check_invariant in flux_refineck::invariants - Rust
flux_refineck::invariants

Function check_invariant

Source 
fn check_invariant(
     genv: GlobalEnv<'_, '_>,
-    cache: &mut FixQueryCache,
+    cache: &mut FixQueryCache,
     def_id: MaybeExternId,
     adt_def: &AdtDef,
     span: Span,
diff --git a/doc/flux_refineck/invariants/fn.check_invariants.html b/doc/flux_refineck/invariants/fn.check_invariants.html
index fd922ceb74..a8dbfa6e34 100644
--- a/doc/flux_refineck/invariants/fn.check_invariants.html
+++ b/doc/flux_refineck/invariants/fn.check_invariants.html
@@ -1,6 +1,6 @@
 check_invariants in flux_refineck::invariants - Rust
flux_refineck::invariants
Function check_invariants
Source 
pub fn check_invariants(
     genv: GlobalEnv<'_, '_>,
-    cache: &mut FixQueryCache,
+    cache: &mut FixQueryCache,
     def_id: MaybeExternId,
     invariants: &[Expr<'_>],
     adt_def: &AdtDef,
diff --git a/doc/flux_refineck/primops/struct.Pre.html b/doc/flux_refineck/primops/struct.Pre.html
index 0025d9ca88..7faa4d65c5 100644
--- a/doc/flux_refineck/primops/struct.Pre.html
+++ b/doc/flux_refineck/primops/struct.Pre.html
@@ -1,7 +1,7 @@
 Pre in flux_refineck::primops - Rust
flux_refineck::primops
Struct Pre
Source 
pub(crate) struct Pre {
-    pub reason: ConstrReason,
+    pub reason: ConstrReason,
     pub pred: Expr,
-}
Fields§
§reason: ConstrReason§pred: Expr
Auto Trait Implementations§
§
impl Freeze for Pre
§
impl RefUnwindSafe for Pre
§
impl Send for Pre
§
impl Sync for Pre
§
impl Unpin for Pre
§
impl UnwindSafe for Pre
Blanket Implementations§
Source§
impl<T> Any for T
where
+}
Fields§
§reason: ConstrReason§pred: Expr
Auto Trait Implementations§
§
impl Freeze for Pre
§
impl RefUnwindSafe for Pre
§
impl Send for Pre
§
impl Sync for Pre
§
impl Unpin for Pre
§
impl UnwindSafe for Pre
Blanket Implementations§
Source§
impl<T> Any for T
where
     T: 'static + ?Sized,
Source§
fn type_id(&self) -> TypeId
Gets the TypeId of self. Read more
Source§
impl<T> Borrow<T> for T
where
     T: ?Sized,
Source§
fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
Source§
impl<T> BorrowMut<T> for T
where
     T: ?Sized,
Source§
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§
impl<T> From<T> for T
Source§
fn from(t: T) -> T
Returns the argument unchanged.

diff --git a/doc/flux_refineck/type_env/place_ty/fn.downcast.html b/doc/flux_refineck/type_env/place_ty/fn.downcast.html
index e2febfe498..18c7842a50 100644
--- a/doc/flux_refineck/type_env/place_ty/fn.downcast.html
+++ b/doc/flux_refineck/type_env/place_ty/fn.downcast.html
@@ -1,7 +1,7 @@
 downcast in flux_refineck::type_env::place_ty - Rust
flux_refineck::type_env::place_ty
Function downcast
Source 
fn downcast(
-    infcx: &mut InferCtxt<'_, '_, '_>,
+    infcx: &mut InferCtxt<'_, '_, '_>,
     adt: &AdtDef,
     args: &[GenericArg],
     variant_idx: VariantIdx,
     idx: &Expr,
-) -> InferResult<Vec<Ty>>

\ No newline at end of file
+) -> InferResult<Vec<Ty>>
\ No newline at end of file diff --git a/doc/flux_refineck/type_env/place_ty/fn.downcast_enum.html b/doc/flux_refineck/type_env/place_ty/fn.downcast_enum.html index 7d0827b984..720969d2c2 100644 --- a/doc/flux_refineck/type_env/place_ty/fn.downcast_enum.html +++ b/doc/flux_refineck/type_env/place_ty/fn.downcast_enum.html @@ -1,10 +1,10 @@ downcast_enum in flux_refineck::type_env::place_ty - Rust
flux_refineck::type_env::place_ty

Function downcast_enum

Source 
fn downcast_enum(
-    infcx: &mut InferCtxt<'_, '_, '_>,
+    infcx: &mut InferCtxt<'_, '_, '_>,
     adt: &AdtDef,
     variant_idx: VariantIdx,
     args: &[GenericArg],
     idx1: &Expr,
-) -> InferResult<Vec<Ty>>
Expand description

In contrast (w.r.t. struct) downcast on enum works as follows. +) -> InferResult<Vec<Ty>>

Expand description

In contrast (w.r.t. struct) downcast on enum works as follows. Given * a “place” x : T[i..] * a “variant” of type forall z..,(y:t...) => E[j...] diff --git a/doc/flux_refineck/type_env/place_ty/fn.downcast_struct.html b/doc/flux_refineck/type_env/place_ty/fn.downcast_struct.html index 757477da11..40084fc311 100644 --- a/doc/flux_refineck/type_env/place_ty/fn.downcast_struct.html +++ b/doc/flux_refineck/type_env/place_ty/fn.downcast_struct.html @@ -1,9 +1,9 @@ downcast_struct in flux_refineck::type_env::place_ty - Rust

flux_refineck::type_env::place_ty

Function downcast_struct

Source 
fn downcast_struct(
-    infcx: &InferCtxt<'_, '_, '_>,
+    infcx: &InferCtxt<'_, '_, '_>,
     adt: &AdtDef,
     args: &[GenericArg],
     idx: &Expr,
-) -> InferResult<Vec<Ty>>
Expand description

downcast on struct works as follows +) -> InferResult<Vec<Ty>>

Expand description

downcast on struct works as follows Given a struct definition struct S<A..>[(i…)] { fld : T, …} and a diff --git a/doc/flux_refineck/type_env/place_ty/fn.fold.html b/doc/flux_refineck/type_env/place_ty/fn.fold.html index 1848de82a5..f180214340 100644 --- a/doc/flux_refineck/type_env/place_ty/fn.fold.html +++ b/doc/flux_refineck/type_env/place_ty/fn.fold.html @@ -1,6 +1,6 @@ fold in flux_refineck::type_env::place_ty - Rust

flux_refineck::type_env::place_ty

Function fold

Source 
fn fold(
     bindings: &mut PlacesTree,
-    infcx: &mut InferCtxtAt<'_, '_, '_, '_>,
+    infcx: &mut InferCtxtAt<'_, '_, '_, '_>,
     ty: &Ty,
     is_strg: bool,
 ) -> QueryResult<Ty>
\ No newline at end of file diff --git a/doc/flux_refineck/type_env/place_ty/fn.struct_variant.html b/doc/flux_refineck/type_env/place_ty/fn.struct_variant.html index 89509e7c18..087ee2d4ea 100644 --- a/doc/flux_refineck/type_env/place_ty/fn.struct_variant.html +++ b/doc/flux_refineck/type_env/place_ty/fn.struct_variant.html @@ -1,4 +1,4 @@ struct_variant in flux_refineck::type_env::place_ty - Rust
flux_refineck::type_env::place_ty

Function struct_variant

Source 
fn struct_variant(
     genv: GlobalEnv<'_, '_>,
     def_id: DefId,
-) -> InferResult<EarlyBinder<Binder<VariantSig>>>
\ No newline at end of file +) -> InferResult<EarlyBinder<Binder<VariantSig>>>
\ No newline at end of file diff --git a/doc/flux_refineck/type_env/place_ty/struct.LookupResult.html b/doc/flux_refineck/type_env/place_ty/struct.LookupResult.html index cfdc25921d..0b5ff072eb 100644 --- a/doc/flux_refineck/type_env/place_ty/struct.LookupResult.html +++ b/doc/flux_refineck/type_env/place_ty/struct.LookupResult.html @@ -5,7 +5,7 @@ bindings: &'a mut PlacesTree, }

Fields§

§ty: Ty§is_strg: bool§cursor: Cursor§bindings: &'a mut PlacesTree

Implementations§

Source§

impl LookupResult<'_>

Source

pub(crate) fn update(self, new: Ty) -> Ty

Source

pub(crate) fn block_with(self, new_ty: Ty) -> Ty

Source

pub(crate) fn fold( self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, ) -> QueryResult<Ty>

Source

pub(crate) fn path(&self) -> Path

Trait Implementations§

Source§

impl<'a> Debug for LookupResult<'a>

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

§

impl<'a> Freeze for LookupResult<'a>

§

impl<'a> RefUnwindSafe for LookupResult<'a>

§

impl<'a> Send for LookupResult<'a>

§

impl<'a> Sync for LookupResult<'a>

§

impl<'a> Unpin for LookupResult<'a>

§

impl<'a> !UnwindSafe for LookupResult<'a>

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where diff --git a/doc/flux_refineck/type_env/place_ty/struct.PlacesTree.html b/doc/flux_refineck/type_env/place_ty/struct.PlacesTree.html index 60d6112abf..5c7f52861a 100644 --- a/doc/flux_refineck/type_env/place_ty/struct.PlacesTree.html +++ b/doc/flux_refineck/type_env/place_ty/struct.PlacesTree.html @@ -2,17 +2,17 @@ map: FxHashMap<Loc, Binding>, }

Fields§

§map: FxHashMap<Loc, Binding>

Implementations§

Source§

impl PlacesTree

Source

pub(crate) fn unfold( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, key: &impl LookupKey, -) -> InferResult

Source

pub fn unblock(&mut self, infcx: &mut InferCtxt<'_, '_, '_>, place: &Place)

Source

fn lookup_inner<M: LookupMode>( +) -> InferResult

Source

pub fn unblock(&mut self, infcx: &mut InferCtxt<'_, '_, '_>, place: &Place)

Source

fn lookup_inner<M: LookupMode>( &mut self, key: &impl LookupKey, mode: M, ) -> Result<LookupResult<'_>, M::Error>

Source

pub(crate) fn lookup_unfolding( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, key: &impl LookupKey, -) -> InferResult<LookupResult<'_>>

Source

pub(crate) fn lookup(&mut self, key: &impl LookupKey) -> LookupResult<'_>

Source

pub(crate) fn paths(&self) -> Vec<Path>

Source

pub(crate) fn get(&self, path: &Path) -> Ty

Source

pub(crate) fn fmap_mut(&mut self, f: impl FnMut(&Ty) -> Ty)

Source

fn try_fmap_mut<E>( +) -> InferResult<LookupResult<'_>>

Source

pub(crate) fn lookup(&mut self, key: &impl LookupKey) -> LookupResult<'_>

Source

pub(crate) fn paths(&self) -> Vec<Path>

Source

pub(crate) fn get(&self, path: &Path) -> Ty

Source

pub(crate) fn fmap_mut(&mut self, f: impl FnMut(&Ty) -> Ty)

Source

fn try_fmap_mut<E>( &mut self, f: impl FnMut(&Ty) -> Result<Ty, E>, ) -> Result<(), E>

Source

pub(crate) fn flatten(self) -> Vec<(Path, LocKind, Ty)>

Source

pub(crate) fn insert(&mut self, loc: Loc, kind: LocKind, ty: Ty)

Source

pub(crate) fn remove_local(&mut self, loc: &Loc)

Source

pub(crate) fn local_ptrs(&self) -> Vec<(Loc, Ty, Ty)>

Source

fn remove(&mut self, loc: &Loc) -> Binding

Source

pub(crate) fn iter(&self) -> impl Iterator<Item = (&Loc, &Binding)>

Source

fn iter_flatten(&self, f: impl FnMut(Path, &LocKind, &Ty))

Source

pub(crate) fn get_loc(&self, loc: &Loc) -> &Binding

Source

fn get_loc_mut(&mut self, loc: &Loc) -> &mut Binding

Source

fn cursor_for(&self, key: &impl LookupKey) -> Cursor

Trait Implementations§

Source§

impl Clone for PlacesTree

Source§

fn clone(&self) -> PlacesTree

Returns a copy of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
Source§

impl Debug for PlacesTree

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
Source§

impl Default for PlacesTree

Source§

fn default() -> PlacesTree

Returns the “default value” for a type. Read more
Source§

impl Pretty for PlacesTree

Source§

fn fmt(&self, cx: &PrettyCx<'_, '_>, f: &mut Formatter<'_>) -> Result

Source§

fn default_cx(tcx: TyCtxt<'_>) -> PrettyCx<'_, '_>

Source§

impl TypeFoldable for PlacesTree

Source§

fn try_fold_with<F: FallibleTypeFolder>( diff --git a/doc/flux_refineck/type_env/place_ty/struct.Unfold.html b/doc/flux_refineck/type_env/place_ty/struct.Unfold.html index dcd60cff8a..c0b0cb1019 100644 --- a/doc/flux_refineck/type_env/place_ty/struct.Unfold.html +++ b/doc/flux_refineck/type_env/place_ty/struct.Unfold.html @@ -1,4 +1,4 @@ -Unfold in flux_refineck::type_env::place_ty - Rust
flux_refineck::type_env::place_ty

Struct Unfold

Source 
struct Unfold<'a, 'infcx, 'genv, 'tcx>(&'a mut InferCtxt<'infcx, 'genv, 'tcx>);

Tuple Fields§

§0: &'a mut InferCtxt<'infcx, 'genv, 'tcx>

Trait Implementations§

Source§

impl LookupMode for Unfold<'_, '_, '_, '_>

Source§

type Error = InferErr

Source§

fn unpack(&mut self, ty: &Ty) -> Ty

Source§

fn downcast_struct( +Unfold in flux_refineck::type_env::place_ty - Rust
flux_refineck::type_env::place_ty

Struct Unfold

Source 
struct Unfold<'a, 'infcx, 'genv, 'tcx>(&'a mut InferCtxt<'infcx, 'genv, 'tcx>);

Tuple Fields§

§0: &'a mut InferCtxt<'infcx, 'genv, 'tcx>

Trait Implementations§

Source§

impl LookupMode for Unfold<'_, '_, '_, '_>

Source§

type Error = InferErr

Source§

fn unpack(&mut self, ty: &Ty) -> Ty

Source§

fn downcast_struct( &mut self, adt: &AdtDef, args: &[GenericArg], diff --git a/doc/flux_refineck/type_env/place_ty/struct.Unfolder.html b/doc/flux_refineck/type_env/place_ty/struct.Unfolder.html index fa1fc3746e..5cf008fa38 100644 --- a/doc/flux_refineck/type_env/place_ty/struct.Unfolder.html +++ b/doc/flux_refineck/type_env/place_ty/struct.Unfolder.html @@ -1,10 +1,10 @@ Unfolder in flux_refineck::type_env::place_ty - Rust
flux_refineck::type_env::place_ty

Struct Unfolder

Source 
struct Unfolder<'a, 'infcx, 'genv, 'tcx> {
-    infcx: &'a mut InferCtxt<'infcx, 'genv, 'tcx>,
+    infcx: &'a mut InferCtxt<'infcx, 'genv, 'tcx>,
     insertions: Vec<(Loc, Binding)>,
     cursor: Cursor,
     in_ref: Option<Mutability>,
     has_work: bool,
-}

Fields§

§infcx: &'a mut InferCtxt<'infcx, 'genv, 'tcx>§insertions: Vec<(Loc, Binding)>§cursor: Cursor§in_ref: Option<Mutability>§has_work: bool

Implementations§

Source§

impl<'a, 'infcx, 'genv, 'tcx> Unfolder<'a, 'infcx, 'genv, 'tcx>

Source

fn new(infcx: &'a mut InferCtxt<'infcx, 'genv, 'tcx>, cursor: Cursor) -> Self

Source

fn run(self, bindings: &mut PlacesTree) -> InferResult

Source

fn unfold(&mut self, ty: &Ty) -> InferResult<Ty>

Source

fn deref(&mut self, ty: &Ty) -> InferResult<Ty>

Source

fn unfold_strg_ref(&mut self, path: &Path, ty: &Ty)

Source

fn unfold_box(&mut self, deref_ty: &Ty, alloc: &Ty) -> Loc

Source

fn field(&mut self, ty: &Ty, f: FieldIdx) -> InferResult<Ty>

Source

fn downcast(&mut self, ty: &Ty, variant: VariantIdx) -> InferResult<Ty>

Source

fn index(&mut self, ty: &Ty) -> InferResult

Source

fn unpack(&mut self, ty: &Ty) -> Ty

Source

fn unpack_for_downcast(&mut self, ty: &Ty) -> Ty

Source

fn change_root(&mut self, path: &Path)

Source

fn should_continue(&mut self) -> bool

Trait Implementations§

Source§

impl FallibleTypeFolder for Unfolder<'_, '_, '_, '_>

Source§

type Error = InferErr

Source§

fn try_fold_ty(&mut self, ty: &Ty) -> InferResult<Ty>

Source§

fn try_fold_binder<T>( +}

Fields§

§infcx: &'a mut InferCtxt<'infcx, 'genv, 'tcx>§insertions: Vec<(Loc, Binding)>§cursor: Cursor§in_ref: Option<Mutability>§has_work: bool

Implementations§

Source§

impl<'a, 'infcx, 'genv, 'tcx> Unfolder<'a, 'infcx, 'genv, 'tcx>

Source

fn new(infcx: &'a mut InferCtxt<'infcx, 'genv, 'tcx>, cursor: Cursor) -> Self

Source

fn run(self, bindings: &mut PlacesTree) -> InferResult

Source

fn unfold(&mut self, ty: &Ty) -> InferResult<Ty>

Source

fn deref(&mut self, ty: &Ty) -> InferResult<Ty>

Source

fn unfold_strg_ref(&mut self, path: &Path, ty: &Ty)

Source

fn unfold_box(&mut self, deref_ty: &Ty, alloc: &Ty) -> Loc

Source

fn field(&mut self, ty: &Ty, f: FieldIdx) -> InferResult<Ty>

Source

fn downcast(&mut self, ty: &Ty, variant: VariantIdx) -> InferResult<Ty>

Source

fn index(&mut self, ty: &Ty) -> InferResult

Source

fn unpack(&mut self, ty: &Ty) -> Ty

Source

fn unpack_for_downcast(&mut self, ty: &Ty) -> Ty

Source

fn change_root(&mut self, path: &Path)

Source

fn should_continue(&mut self) -> bool

Trait Implementations§

Source§

impl FallibleTypeFolder for Unfolder<'_, '_, '_, '_>

Source§

type Error = InferErr

Source§

fn try_fold_ty(&mut self, ty: &Ty) -> InferResult<Ty>

Source§

fn try_fold_binder<T>( &mut self, t: &Binder<T>, ) -> Result<Binder<T>, Self::Error>
where diff --git a/doc/flux_refineck/type_env/place_ty/trait.LookupMode.html b/doc/flux_refineck/type_env/place_ty/trait.LookupMode.html index ccbad794ae..d1d6c979c3 100644 --- a/doc/flux_refineck/type_env/place_ty/trait.LookupMode.html +++ b/doc/flux_refineck/type_env/place_ty/trait.LookupMode.html @@ -14,4 +14,4 @@ adt: &AdtDef, args: &[GenericArg], idx: &Expr, -) -> Result<Vec<Ty>, Self::Error>

Implementors§

\ No newline at end of file +) -> Result<Vec<Ty>, Self::Error>

Implementors§

Source§

impl LookupMode for NoUnfold

Source§

impl LookupMode for Unfold<'_, '_, '_, '_>

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type Error = InferErr

\ No newline at end of file diff --git a/doc/flux_refineck/type_env/struct.BasicBlockEnv.html b/doc/flux_refineck/type_env/struct.BasicBlockEnv.html index dddb409171..095448fc99 100644 --- a/doc/flux_refineck/type_env/struct.BasicBlockEnv.html +++ b/doc/flux_refineck/type_env/struct.BasicBlockEnv.html @@ -1,11 +1,11 @@ BasicBlockEnv in flux_refineck::type_env - Rust
flux_refineck::type_env

Struct BasicBlockEnv

Source 
pub struct BasicBlockEnv {
     data: Binder<BasicBlockEnvData>,
-    scope: Scope,
-}

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§data: Binder<BasicBlockEnvData>§scope: Scope

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impl BasicBlockEnv

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pub(crate) fn enter<'a>( + scope: Scope, +}

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§data: Binder<BasicBlockEnvData>§scope: Scope

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impl BasicBlockEnv

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pub(crate) fn enter<'a>( &self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, local_decls: &'a LocalDecls, -) -> TypeEnv<'a>

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pub(crate) fn scope(&self) -> &Scope

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impl Debug for BasicBlockEnv

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Pretty for BasicBlockEnv

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fn fmt(&self, cx: &PrettyCx<'_, '_>, f: &mut Formatter<'_>) -> Result

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fn default_cx(tcx: TyCtxt<'_>) -> PrettyCx<'_, '_>

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impl<T> Any for T
where +) -> TypeEnv<'a>

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pub(crate) fn scope(&self) -> &Scope

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impl Debug for BasicBlockEnv

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Pretty for BasicBlockEnv

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fn fmt(&self, cx: &PrettyCx<'_, '_>, f: &mut Formatter<'_>) -> Result

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fn default_cx(tcx: TyCtxt<'_>) -> PrettyCx<'_, '_>

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

diff --git a/doc/flux_refineck/type_env/struct.BasicBlockEnvShape.html b/doc/flux_refineck/type_env/struct.BasicBlockEnvShape.html index fcfbd10743..a3ac781ebf 100644 --- a/doc/flux_refineck/type_env/struct.BasicBlockEnvShape.html +++ b/doc/flux_refineck/type_env/struct.BasicBlockEnvShape.html @@ -1,7 +1,7 @@ BasicBlockEnvShape in flux_refineck::type_env - Rust
flux_refineck::type_env

Struct BasicBlockEnvShape

Source 
pub struct BasicBlockEnvShape {
-    scope: Scope,
+    scope: Scope,
     bindings: PlacesTree,
-}

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§scope: Scope§bindings: PlacesTree

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impl BasicBlockEnvShape

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pub fn enter<'a>(&self, local_decls: &'a LocalDecls) -> TypeEnv<'a>

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fn new(scope: Scope, env: TypeEnv<'_>) -> BasicBlockEnvShape

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fn pack_ty(scope: &Scope, ty: &Ty) -> Ty

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fn pack_bty(scope: &Scope, bty: &BaseTy) -> BaseTy

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fn pack_generic_arg(scope: &Scope, arg: &GenericArg) -> GenericArg

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fn update(&mut self, path: &Path, ty: Ty)

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pub(crate) fn join(&mut self, other: TypeEnv<'_>) -> bool

join(self, genv, other) consumes the bindings in other, to “update” +}

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§scope: Scope§bindings: PlacesTree

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impl BasicBlockEnvShape

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pub fn enter<'a>(&self, local_decls: &'a LocalDecls) -> TypeEnv<'a>

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fn new(scope: Scope, env: TypeEnv<'_>) -> BasicBlockEnvShape

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fn pack_ty(scope: &Scope, ty: &Ty) -> Ty

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fn pack_bty(scope: &Scope, bty: &BaseTy) -> BaseTy

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fn pack_generic_arg(scope: &Scope, arg: &GenericArg) -> GenericArg

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fn update(&mut self, path: &Path, ty: Ty)

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pub(crate) fn join(&mut self, other: TypeEnv<'_>) -> bool

join(self, genv, other) consumes the bindings in other, to “update” self in place, and returns true if there was an actual change or false indicating no change (i.e., a fixpoint was reached).

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fn join_ty(&self, ty1: &Ty, ty2: &Ty) -> Ty

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fn join_idx( @@ -10,7 +10,7 @@ e2: &Expr, sort: &Sort, bound_sorts: &mut Vec<Sort>, -) -> Expr

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fn join_bty(&self, bty1: &BaseTy, bty2: &BaseTy) -> BaseTy

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fn join_generic_arg(&self, arg1: &GenericArg, arg2: &GenericArg) -> GenericArg

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pub fn into_bb_env(self, infcx: &mut InferCtxtRoot<'_, '_>) -> BasicBlockEnv

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impl Debug for BasicBlockEnvShape

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Pretty for BasicBlockEnvShape

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fn fmt(&self, cx: &PrettyCx<'_, '_>, f: &mut Formatter<'_>) -> Result

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fn default_cx(tcx: TyCtxt<'_>) -> PrettyCx<'_, '_>

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impl<T> Any for T
where +) -> Expr

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fn join_bty(&self, bty1: &BaseTy, bty2: &BaseTy) -> BaseTy

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fn join_generic_arg(&self, arg1: &GenericArg, arg2: &GenericArg) -> GenericArg

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pub fn into_bb_env(self, infcx: &mut InferCtxtRoot<'_, '_>) -> BasicBlockEnv

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impl Debug for BasicBlockEnvShape

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Pretty for BasicBlockEnvShape

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fn fmt(&self, cx: &PrettyCx<'_, '_>, f: &mut Formatter<'_>) -> Result

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fn default_cx(tcx: TyCtxt<'_>) -> PrettyCx<'_, '_>

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

diff --git a/doc/flux_refineck/type_env/struct.TypeEnv.html b/doc/flux_refineck/type_env/struct.TypeEnv.html index 0a934ed225..26bcd78a76 100644 --- a/doc/flux_refineck/type_env/struct.TypeEnv.html +++ b/doc/flux_refineck/type_env/struct.TypeEnv.html @@ -2,38 +2,38 @@ bindings: PlacesTree, local_decls: &'a LocalDecls, }

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§bindings: PlacesTree§local_decls: &'a LocalDecls

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impl<'a> TypeEnv<'a>

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pub fn new( - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, body: &'a Body<'_>, fn_sig: &FnSig, -) -> TypeEnv<'a>

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pub fn empty() -> TypeEnv<'a>

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fn alloc_with_ty(&mut self, local: Local, ty: Ty)

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fn alloc(&mut self, local: Local)

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pub(crate) fn into_infer(self, scope: Scope) -> BasicBlockEnvShape

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pub(crate) fn lookup_rust_ty( +) -> TypeEnv<'a>

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pub fn empty() -> TypeEnv<'a>

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fn alloc_with_ty(&mut self, local: Local, ty: Ty)

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fn alloc(&mut self, local: Local)

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pub(crate) fn into_infer(self, scope: Scope) -> BasicBlockEnvShape

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pub(crate) fn lookup_rust_ty( &self, genv: GlobalEnv<'_, '_>, place: &Place, ) -> QueryResult<Ty>

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pub(crate) fn lookup_place( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, place: &Place, -) -> InferResult<Ty>

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pub(crate) fn get(&self, path: &Path) -> Ty

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pub fn update_path(&mut self, path: &Path, new_ty: Ty)

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pub(crate) fn borrow( +) -> InferResult<Ty>

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pub(crate) fn get(&self, path: &Path) -> Ty

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pub fn update_path(&mut self, path: &Path, new_ty: Ty)

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pub(crate) fn borrow( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, re: Region, mutbl: Mutability, place: &Place, -) -> InferResult<Ty>

When checking a borrow in the right hand side of an assignment x = &'?n p, we use the +) -> InferResult<Ty>

When checking a borrow in the right hand side of an assignment x = &'?n p, we use the annotated region '?n in the type of the result. This region will only be used temporarily and then replaced by the region in the type of x after the assignment. See TypeEnv::assign

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pub(crate) fn ptr_to_ref_at_place( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, place: &Place, -) -> InferResult

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pub(crate) fn ptr_to_ref( +) -> InferResult

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pub(crate) fn ptr_to_ref( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, - reason: ConstrReason, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + reason: ConstrReason, re: Region, path: &Path, bound: PtrToRefBound, -) -> InferResult<Ty>

Convert a (strong) pointer to a mutable reference.

+) -> InferResult<Ty>

Convert a (strong) pointer to a mutable reference.

This roughly implements the following inference rule:

                  t₁ <: t₂
 -------------------------------------------------
@@ -49,13 +49,13 @@
 ----------------------------------------------------------------
 x: i32[a] ; ptr(mut, x) => x:†i32{v: $k(v)} ; &mut i32{v: $k(v)}
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pub(crate) fn fold_local_ptrs( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, -) -> InferResult

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pub(crate) fn assign( + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, +) -> InferResult

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pub(crate) fn assign( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, place: &Place, new_ty: Ty, -) -> InferResult

Updates the type of place to new_ty. This may involve a strong update if we have +) -> InferResult

Updates the type of place to new_ty. This may involve a strong update if we have ownership of place or a weak update if it’s behind a reference (which fires a subtyping constraint)

When strong updating, the process involves recovering the original regions (lifetimes) used @@ -67,62 +67,62 @@ assigned type are consistent with those expected by the place’s original type definition.

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pub(crate) fn move_place( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, place: &Place, -) -> InferResult<Ty>

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pub(crate) fn unpack(&mut self, infcx: &mut InferCtxt<'_, '_, '_>)

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pub(crate) fn unblock( +) -> InferResult<Ty>

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pub(crate) fn unpack(&mut self, infcx: &mut InferCtxt<'_, '_, '_>)

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pub(crate) fn unblock( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, place: &Place, )

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pub(crate) fn check_goto( self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, bb_env: &BasicBlockEnv, target: BasicBlock, -) -> InferResult

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pub(crate) fn fold( +) -> InferResult

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pub(crate) fn fold( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, place: &Place, -) -> InferResult

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pub(crate) fn unfold_local_ptr( +) -> InferResult

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pub(crate) fn unfold_local_ptr( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, bound: &Ty, -) -> InferResult<Loc>

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pub(crate) fn unfold_strg_ref( +) -> InferResult<Loc>

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pub(crate) fn unfold_strg_ref( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, path: &Path, ty: &Ty, -) -> InferResult<Loc>

-----------------------------------
+) -> InferResult<Loc>
-----------------------------------
 Γ ; &strg <ℓ: t> => Γ,ℓ: t ; ptr(ℓ)
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pub(crate) fn unfold( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, place: &Place, -) -> InferResult

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pub(crate) fn downcast( +) -> InferResult

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pub(crate) fn downcast( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, place: &Place, variant_idx: VariantIdx, -) -> InferResult

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pub fn replace_evars(&mut self, evars: &EVarSol)

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pub(crate) fn update_ensures( +) -> InferResult

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pub fn replace_evars(&mut self, evars: &EVarSol)

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pub(crate) fn update_ensures( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, output: &FnOutput, )

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pub(crate) fn check_ensures( &mut self, - at: &mut InferCtxtAt<'_, '_, '_, '_>, + at: &mut InferCtxtAt<'_, '_, '_, '_>, output: &FnOutput, - reason: ConstrReason, -) -> InferResult

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impl<'a> Clone for TypeEnv<'a>

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fn clone(&self) -> TypeEnv<'a>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for TypeEnv<'_>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'a> Default for TypeEnv<'a>

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fn default() -> TypeEnv<'a>

Returns the “default value” for a type. Read more
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impl LocEnv for TypeEnv<'_>

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fn ptr_to_ref( + reason: ConstrReason, +) -> InferResult

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impl<'a> Clone for TypeEnv<'a>

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fn clone(&self) -> TypeEnv<'a>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for TypeEnv<'_>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'a> Default for TypeEnv<'a>

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fn default() -> TypeEnv<'a>

Returns the “default value” for a type. Read more
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impl LocEnv for TypeEnv<'_>

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fn ptr_to_ref( &mut self, - infcx: &mut InferCtxtAt<'_, '_, '_, '_>, - reason: ConstrReason, + infcx: &mut InferCtxtAt<'_, '_, '_, '_>, + reason: ConstrReason, re: Region, path: &Path, bound: Ty, -) -> InferResult<Ty>

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fn get(&self, path: &Path) -> Ty

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fn unfold_strg_ref( +) -> InferResult<Ty>

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fn get(&self, path: &Path) -> Ty

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fn unfold_strg_ref( &mut self, - infcx: &mut InferCtxt<'_, '_, '_>, + infcx: &mut InferCtxt<'_, '_, '_>, path: &Path, ty: &Ty, -) -> InferResult<Loc>

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impl Pretty for TypeEnv<'_>

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fn fmt(&self, cx: &PrettyCx<'_, '_>, f: &mut Formatter<'_>) -> Result

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fn default_cx(tcx: TyCtxt<'_>) -> PrettyCx<'_, '_>

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impl<'a> Freeze for TypeEnv<'a>

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impl<'a> RefUnwindSafe for TypeEnv<'a>

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impl<'a> Send for TypeEnv<'a>

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impl<'a> Sync for TypeEnv<'a>

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impl<'a> Unpin for TypeEnv<'a>

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impl<'a> UnwindSafe for TypeEnv<'a>

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impl<T> Any for T
where +) -> InferResult<Loc>

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impl Pretty for TypeEnv<'_>

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fn fmt(&self, cx: &PrettyCx<'_, '_>, f: &mut Formatter<'_>) -> Result

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fn default_cx(tcx: TyCtxt<'_>) -> PrettyCx<'_, '_>

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impl<'a> Freeze for TypeEnv<'a>

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impl<'a> RefUnwindSafe for TypeEnv<'a>

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impl<'a> Send for TypeEnv<'a>

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impl<'a> Sync for TypeEnv<'a>

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impl<'a> Unpin for TypeEnv<'a>

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impl<'a> UnwindSafe for TypeEnv<'a>

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where diff --git a/doc/src/flux_refineck/lib.rs.html b/doc/src/flux_refineck/lib.rs.html index 0d3cae3d6a..adc38a2e95 100644 --- a/doc/src/flux_refineck/lib.rs.html +++ b/doc/src/flux_refineck/lib.rs.html @@ -429,13 +429,26 @@ return Ok(()); } + let opts = genv.infer_opts(local_id); + + // FIXME(nilehmann) we should move this check to `compare_impl_item` + if let Some(infcx_root) = trait_impl_subtyping(genv, local_id, opts, span) + .with_span(span) + .map_err(|err| err.emit(genv, def_id))? + { + tracing::info!("check_fn::refine-subtyping"); + let errors = infcx_root + .execute_fixpoint_query(cache, def_id, "sub.fluxc") + .emit(&genv)?; + tracing::info!("check_fn::fixpoint-subtyping"); + report_fixpoint_errors(genv, local_id, errors)?; + } + // Skip trusted functions if genv.trusted(local_id) { return Ok(()); } - let opts = genv.infer_opts(local_id); - dbg::check_fn_span!(genv.tcx(), local_id).in_scope(|| { let ghost_stmts = compute_ghost_statements(genv, local_id) .with_span(span) @@ -458,19 +471,6 @@ .emit(&genv)?; tracing::info!("check_fn::fixpoint"); report_fixpoint_errors(genv, local_id, errors)?; - - // PHASE 4: subtyping check for trait-method implementations - if let Some(infcx_root) = trait_impl_subtyping(genv, local_id, opts, span) - .with_span(span) - .map_err(|err| err.emit(genv, def_id))? - { - tracing::info!("check_fn::refine-subtyping"); - let errors = infcx_root - .execute_fixpoint_query(cache, def_id, "sub.fluxc") - .emit(&genv)?; - tracing::info!("check_fn::fixpoint-subtyping"); - report_fixpoint_errors(genv, local_id, errors)?; - } Ok(()) })?; diff --git a/doc/trait.impl/flux_infer/infer/trait.LocEnv.js b/doc/trait.impl/flux_infer/infer/trait.LocEnv.js index e655ae5cd0..83e9ed687f 100644 --- a/doc/trait.impl/flux_infer/infer/trait.LocEnv.js +++ b/doc/trait.impl/flux_infer/infer/trait.LocEnv.js @@ -1,9 +1,9 @@ (function() { - var implementors = Object.fromEntries([["flux_refineck",[["impl LocEnv for TypeEnv<'_>"]]]]); + var implementors = Object.fromEntries([["flux_refineck",[["impl LocEnv for TypeEnv<'_>"]]]]); if (window.register_implementors) { window.register_implementors(implementors); } else { window.pending_implementors = implementors; } })() -//{"start":57,"fragment_lengths":[292]} \ No newline at end of file +//{"start":57,"fragment_lengths":[183]} \ No newline at end of file diff --git a/doc/type.impl/core/result/enum.Result.js b/doc/type.impl/core/result/enum.Result.js index edd071a97b..99d6eed231 100644 --- a/doc/type.impl/core/result/enum.Result.js +++ b/doc/type.impl/core/result/enum.Result.js @@ -1,9 +1,9 @@ (function() { - var type_impls = Object.fromEntries([["flux_desugar",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
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impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

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fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

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fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"]]],["flux_driver",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"]]],["flux_fhir_analysis",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"]]],["flux_infer",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_infer::infer::InferResult"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_infer::infer::InferResult"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_infer::infer::InferResult"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_infer::infer::InferResult"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_infer::infer::InferResult"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_infer::infer::InferResult"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_infer::infer::InferResult"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_infer::infer::InferResult"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_infer::infer::InferResult"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_infer::infer::InferResult"]]],["flux_middle",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"]]],["flux_refineck",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_refineck::checker::Result"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_refineck::checker::Result"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_refineck::checker::Result"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_refineck::checker::Result"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_refineck::checker::Result"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> ResultExt<T> for Result<T, E>
where\n E: Into<InferErr>,

Source§

fn with_span(self, span: Span) -> Result<T, CheckerError>

","ResultExt","flux_refineck::checker::Result"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_refineck::checker::Result"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_refineck::checker::Result"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_refineck::checker::Result"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_refineck::checker::Result"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_refineck::checker::Result"]]],["flux_syntax",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_syntax::ParseResult"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_syntax::ParseResult"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_syntax::ParseResult"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_syntax::ParseResult"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_syntax::ParseResult"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_syntax::ParseResult"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_syntax::ParseResult"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_syntax::ParseResult"]]]]); + var type_impls = Object.fromEntries([["flux_desugar",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_desugar::desugar::Result","flux_desugar::resolver::refinement_resolver::Result","flux_desugar::resolver::Result","flux_desugar::Result"]]],["flux_driver",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_driver::collector::extern_specs::Result","flux_driver::collector::Result","flux_driver::collector::AttrMapErr"]]],["flux_fhir_analysis",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_fhir_analysis::compare_impl_item::Result","flux_fhir_analysis::wf::param_usage::Result","flux_fhir_analysis::wf::sortck::Result","flux_fhir_analysis::wf::Result"]]],["flux_infer",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_infer::infer::InferResult"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_infer::infer::InferResult"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_infer::infer::InferResult"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_infer::infer::InferResult"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_infer::infer::InferResult"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_infer::infer::InferResult"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_infer::infer::InferResult"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_infer::infer::InferResult"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_infer::infer::InferResult"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_infer::infer::InferResult"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_infer::infer::InferResult"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_infer::infer::InferResult"]]],["flux_middle",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_middle::fhir::lift::Result","flux_middle::queries::QueryResult"]]],["flux_refineck",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_refineck::checker::Result"],["
Source§

impl<'de, T, E> Deserialize<'de> for Result<T, E>
where\n T: Deserialize<'de>,\n E: Deserialize<'de>,

Source§

fn deserialize<D>(\n deserializer: D,\n) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where\n D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
","Deserialize<'de>","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_refineck::checker::Result"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_refineck::checker::Result"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_refineck::checker::Result"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_refineck::checker::Result"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_refineck::checker::Result"],["
Source§

impl<T, E> ResultExt<T> for Result<T, E>
where\n E: Into<InferErr>,

Source§

fn with_span(self, span: Span) -> Result<T, CheckerError>

","ResultExt","flux_refineck::checker::Result"],["
Source§

impl<T, E> ResultExt<T, E> for Result<T, E>

Source§

fn into_control_flow(self) -> ControlFlow<E, T>

Source§

fn collect_err(self, collector: &mut impl ErrorCollector<E>) -> Option<T>

Source§

fn emit<'a>(self, emitter: &'a impl ErrorEmitter) -> Result<T, ErrorGuaranteed>
where\n E: Diagnostic<'a>,

","ResultExt","flux_refineck::checker::Result"],["
Source§

impl<T, E> Serialize for Result<T, E>
where\n T: Serialize,\n E: Serialize,

Source§

fn serialize<S>(\n &self,\n serializer: S,\n) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where\n S: Serializer,

Serialize this value into the given Serde serializer. Read more
","Serialize","flux_refineck::checker::Result"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_refineck::checker::Result"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_refineck::checker::Result"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_refineck::checker::Result"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_refineck::checker::Result"]]],["flux_syntax",[["
1.0.0 · Source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

Source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
Source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

Source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","flux_syntax::ParseResult"],["
Source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_syntax::ParseResult"],["
Source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

Source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

Source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> IntoIterator for Result<T, E>

Source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
Source§

type Item = T

The type of the elements being iterated over.
Source§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

Source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · Source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized,

Restrict a value to a certain interval. Read more
","Ord","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

Source§

fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient,\nand should not be overridden without very good reason.
","PartialEq","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

Source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · Source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · Source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the\n<= operator. Read more
1.0.0 · Source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the >\noperator. Read more
1.0.0 · Source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by\nthe >= operator. Read more
","PartialOrd","flux_syntax::ParseResult"],["
1.16.0 · Source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

Source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","flux_syntax::ParseResult"],["
Source§

impl<T, E> Residual<T> for Result<Infallible, E>

Source§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<&T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<&mut T, E>

1.59.0 (const: 1.83.0) · Source

pub const fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · Source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: 1.83.0) · Source

pub const fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<Result<T, E>, E>

Source

pub const fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"flux_syntax::ParseResult"],["
Source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · Source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · Source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · Source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · Source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · Source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · Source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · Source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: 1.83.0) · Source

pub const fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · Source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · Source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · Source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · Source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · Source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · Source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · Source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · Source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · Source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · Source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · Source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · Source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · Source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · Source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · Source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
Source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
Source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · Source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · Source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · Source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · Source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · Source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · Source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · Source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · Source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"flux_syntax::ParseResult"],["
1.16.0 · Source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

Source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","flux_syntax::ParseResult"],["
1.61.0 · Source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

Source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","flux_syntax::ParseResult"],["
Source§

impl<T, E> Try for Result<T, E>

Source§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
Source§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
Source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
Source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","flux_syntax::ParseResult"],["
1.0.0 · Source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","flux_syntax::ParseResult"]]]]); if (window.register_type_impls) { window.register_type_impls(type_impls); } else { window.pending_type_impls = type_impls; } })() -//{"start":55,"fragment_lengths":[171282,170632,171965,168447,169410,170390,159724]} \ No newline at end of file +//{"start":55,"fragment_lengths":[171282,170632,171965,168447,169410,170280,159724]} \ No newline at end of file