Keyword display improvements

base/REPLCompletions.jl

@@ -323,10 +323,15 @@ function complete_methods(ex_org::Expr)
     out = String[]
     t_in = Tuple{Core.Typeof(func), args_ex...} # Input types
     na = length(args_ex)+1
-    for method in methods(func)
+    ml = methods(func)
+    kwtype = isdefined(ml.mt, :kwsorter) ? Nullable{DataType}(typeof(ml.mt.kwsorter)) : Nullable{DataType}()
+    io = IOBuffer()
+    for method in ml
         # Check if the method's type signature intersects the input types
-        typeintersect(Tuple{method.sig.parameters[1 : min(na, end)]...}, t_in) != Union{} &&
-            push!(out,string(method))
+        if typeintersect(Tuple{method.sig.parameters[1 : min(na, end)]...}, t_in) != Union{}
+            show(io, method, kwtype=kwtype)
+            push!(out, takebuf_string(io))
+        end
     end
     return out
 end

base/error.jl

@@ -27,7 +27,7 @@ backtrace() = ccall(:jl_backtrace_from_here, Array{Ptr{Void},1}, (Int32,), false
 catch_backtrace() = ccall(:jl_get_backtrace, Array{Ptr{Void},1}, ())
 
 ## keyword arg lowering generates calls to this ##
-kwerr(kw) = error("unrecognized keyword argument \"", kw, "\"")
+kwerr(kw, args...) = throw(MethodError(typeof(args[1]).name.mt.kwsorter, (kw,args...)))
 
 ## system error handling ##
 

base/methodshow.jl

@@ -78,7 +78,13 @@ function kwarg_decl(sig::ANY, kwtype::DataType)
     kwli = ccall(:jl_methtable_lookup, Any, (Any, Any), kwtype.name.mt, sig)
     if kwli !== nothing
         kwli = kwli::Method
-        return filter(x->!('#' in string(x)), kwli.lambda_template.slotnames[kwli.lambda_template.nargs+1:end])
+        kws = filter(x->!('#' in string(x)), kwli.lambda_template.slotnames[kwli.lambda_template.nargs+1:end])
+        # ensure the kwarg... is always printed last. The order of the arguments are not
+        # necessarily the same as defined in the function
+        i = findfirst(x -> endswith(string(x), "..."), kws)
+        i==0 && return kws
+        push!(kws, kws[i])
+        return deleteat!(kws,i)
     end
     return ()
 end

base/replutil.jl

@@ -123,6 +123,16 @@ function showerror(io::IO, ex::MethodError)
     ft = typeof(f)
     name = ft.name.mt.name
     f_is_function = false
+    kwargs = Any[]
+    if startswith(string(ft.name), "#kw#")
+        f = ex.args[2]
+        ft = typeof(f)
+        name = ft.name.mt.name
+        arg_types_param = arg_types_param[3:end]
+        temp = ex.args[1]
+        kwargs = Any[(temp[i*2-1], temp[i*2]) for i in 1:(length(temp) ÷ 2)]
+        ex = MethodError(f, ex.args[3:end])
+    end
     if f == Base.convert && length(arg_types_param) == 2 && !is_arg_types
         f_is_function = true
         # See #13033
@@ -150,6 +160,14 @@ function showerror(io::IO, ex::MethodError)
             print(io, "::$typ")
             i == length(arg_types_param) || print(io, ", ")
         end
+        if !isempty(kwargs)
+            print(io, "; ")
+            for (i, (k, v)) in enumerate(kwargs)
+                print(io, k, "=")
+                show(IOContext(io, :limit=>true), v)
+                i == length(kwargs) || print(io, ", ")
+            end
+        end
         print(io, ")")
     end
     if ft <: AbstractArray
@@ -189,7 +207,7 @@ function showerror(io::IO, ex::MethodError)
                   "\nsince type constructors fall back to convert methods.")
     end
     try
-        show_method_candidates(io, ex)
+        show_method_candidates(io, ex, kwargs)
     catch
         warn(io, "Error showing method candidates, aborted")
     end
@@ -222,7 +240,7 @@ function showerror_nostdio(err, msg::AbstractString)
     ccall(:jl_printf, Cint, (Ptr{Void},Cstring), stderr_stream, "\n")
 end
 
-function show_method_candidates(io::IO, ex::MethodError)
+function show_method_candidates(io::IO, ex::MethodError, kwargs::Vector=Any[])
     is_arg_types = isa(ex.args, DataType)
     arg_types = is_arg_types ? ex.args : typesof(ex.args...)
     arg_types_param = Any[arg_types.parameters...]
@@ -233,7 +251,7 @@ function show_method_candidates(io::IO, ex::MethodError)
     else
         f = ex.f
     end
-
+    ft = typeof(f)
     lines = []
     # These functions are special cased to only show if first argument is matched.
     special = f in [convert, getindex, setindex!]
@@ -262,7 +280,6 @@ function show_method_candidates(io::IO, ex::MethodError)
                 use_constructor_syntax = isa(func, Type)
                 print(buf, use_constructor_syntax ? func : typeof(func).name.mt.name)
             end
-            right_matches = 0
             tv = method.tvars
             if !isa(tv,SimpleVector)
                 tv = Any[tv]
@@ -318,17 +335,19 @@ function show_method_candidates(io::IO, ex::MethodError)
                 end
             end
 
-            if right_matches > 0
+            if right_matches > 0 || length(ex.args) < 2
                 if length(t_i) < length(sig)
                     # If the methods args is longer than input then the method
                     # arguments is printed as not a match
-                    for sigtype in sig[length(t_i)+1:end]
+                    for (k, sigtype) in enumerate(sig[length(t_i)+1:end])
                         if Base.isvarargtype(sigtype)
                             sigstr = string(sigtype.parameters[1], "...")
                         else
                             sigstr = string(sigtype)
                         end
-                        print(buf, ", ")
+                        if !((min(length(t_i), length(sig)) == 0) && k==1)
+                            print(buf, ", ")
+                        end
                         if Base.have_color
                             Base.with_output_color(:red, buf) do buf
                                 print(buf, "::$sigstr")
@@ -338,7 +357,28 @@ function show_method_candidates(io::IO, ex::MethodError)
                         end
                     end
                 end
+                kwords = Symbol[]
+                if isdefined(ft.name.mt, :kwsorter)
+                    kwsorter_t = typeof(ft.name.mt.kwsorter)
+                    kwords = kwarg_decl(method.sig, kwsorter_t)
+                    length(kwords) > 0 && print(buf, "; ", join(kwords, ", "))
+                end
                 print(buf, ")")
+                if !isempty(kwargs)
+                    unexpected = Symbol[]
+                    if isempty(kwords) || !(any(endswith(string(kword), "...") for kword in kwords))
+                        for (k, v) in kwargs
+                            if !(k in kwords)
+                                push!(unexpected, k)
+                            end
+                        end
+                    end
+                    if !isempty(unexpected)
+                        Base.with_output_color(:red, buf) do buf
+                            print(buf, " got an unsupported keyword argument \"", join(unexpected, "\", \""), "\"")
+                        end
+                    end
+                end
                 push!(lines, (buf, right_matches))
             end
         end

src/julia-syntax.scm

@@ -397,7 +397,8 @@
                   sparams))
          (keyword-sparam-names
           (map (lambda (s) (if (symbol? s) s (cadr s))) keyword-sparams)))
-    (let ((kw (gensy)) (i (gensy)) (ii (gensy)) (elt (gensy)) (rkw (gensy))
+    (let ((kw (gensy)) (i (gensy)) (ii (gensy)) (elt (gensy))
+          (rkw (if (null? restkw) '() (symbol (string (car restkw) "..."))))
           (mangled (symbol (string "#" (if name (undot-name name) 'call) "#"
                                    (string (current-julia-module-counter)))))
           (flags (map (lambda (x) (gensy)) vals)))
@@ -492,7 +493,8 @@
                                    ,else)))
                           (if (null? restkw)
                               ;; if no rest kw, give error for unrecognized
-                              `(call (top kwerr) ,elt)
+                              `(call (top kwerr) ,kw ,@(map arg-name pargl),@(if (null? vararg) '()
+                                (list `(... ,(arg-name (car vararg))))))
                               ;; otherwise add to rest keywords
                               `(ccall 'jl_cell_1d_push Void (tuple Any Any)
                                       ,rkw (tuple ,elt

test/keywordargs.jl

@@ -9,7 +9,7 @@ kwf1(ones; tens=0, hundreds=0) = ones + 10*tens + 100*hundreds
 @test kwf1(3, tens=7, hundreds=2) == 273
 
 @test_throws MethodError kwf1()             # no method, too few args
-@test_throws ErrorException kwf1(1, z=0)    # unsupported keyword
+@test_throws MethodError kwf1(1, z=0)    # unsupported keyword
 @test_throws MethodError kwf1(1, 2)         # no method, too many positional args
 
 # keyword args plus varargs
@@ -18,7 +18,7 @@ kwf2(x, rest...; y=1) = (x, y, rest)
 @test isequal(kwf2(0,1,2), (0, 1, (1,2)))
 @test isequal(kwf2(0,1,2,y=88), (0, 88, (1,2)))
 @test isequal(kwf2(0,y=88,1,2), (0, 88, (1,2)))
-@test_throws ErrorException kwf2(0, z=1)
+@test_throws MethodError kwf2(0, z=1)
 @test_throws MethodError kwf2(y=1)
 
 # keyword arg with declared type
@@ -191,7 +191,7 @@ let f = (x;a=1,b=2)->(x, a, b)
     @test f(0) === (0, 1, 2)
     @test f(1,a=10,b=20) === (1,10,20)
     @test f(0,b=88) === (0, 1, 88)
-    @test_throws ErrorException f(0,z=1)
+    @test_throws MethodError f(0,z=1)
 end
 @test ((a=2)->10a)(3) == 30
 @test ((a=2)->10a)() == 20

test/replcompletions.jl

@@ -43,6 +43,8 @@ module CompletionFoo
     const a=x->x
     test6()=[a, a]
 
+    kwtest(; x=1, y=2, w...) = pass
+
     array = [1, 1]
     varfloat = 0.1
 
@@ -325,6 +327,12 @@ c, r, res = test_complete(s)
 @test length(c) == 2
 #################################################################
 
+s = "CompletionFoo.kwtest( "
+c, r, res = test_complete(s)
+@test !res
+@test length(c) == 1
+@test contains(c[1], "x, y, w...")
+
 # Test of inference based getfield completion
 s = "\"\"."
 c,r = test_complete(s)

test/replutil.jl

@@ -52,16 +52,19 @@ no_color = no_color = "\nClosest candidates are:\n  method_c3(::Float64, !Matche
 test_have_color(buf, color, no_color)
 
 # Test for the method error in issue #8651
-Base.show_method_candidates(buf, MethodError(readline,("",)))
-test_have_color(buf, "\e[0m\nClosest candidates are:\n  readline(::AbstractString)\e[0m", "\nClosest candidates are:\n  readline(::AbstractString)")
+method_c4() = true
+method_c4(x::AbstractString) = false
+Base.show_method_candidates(buf, MethodError(method_c4,("",)))
+test_have_color(buf, "\e[0m\nClosest candidates are:\n  method_c4(::AbstractString)\n  method_c4()\e[0m", "\nClosest candidates are:\n  method_c4(::AbstractString)\n  method_c4()")
 
-method_c4(::Type{Float64}) = true
-Base.show_method_candidates(buf, MethodError(method_c4,(Float64,)))
-test_have_color(buf, "\e[0m\nClosest candidates are:\n  method_c4(::Type{Float64})\e[0m",
-                "\nClosest candidates are:\n  method_c4(::Type{Float64})")
+method_c5(::Type{Float64}) = true
+Base.show_method_candidates(buf, MethodError(method_c5,(Float64,)))
+test_have_color(buf, "\e[0m\nClosest candidates are:\n  method_c5(::Type{Float64})\e[0m",
+                "\nClosest candidates are:\n  method_c5(::Type{Float64})")
 
-Base.show_method_candidates(buf, MethodError(method_c4,(Int32,)))
-test_have_color(buf, "", "")
+Base.show_method_candidates(buf, MethodError(method_c5,(Int32,)))
+test_have_color(buf, "\e[0m\nClosest candidates are:\n  method_c5(\e[1m\e[31m::Type{Float64}\e[0m)\e[0m",
+                "\nClosest candidates are:\n  method_c5(!Matched::Type{Float64})")
 
 type Test_type end
 test_type = Test_type()
@@ -83,6 +86,41 @@ Base.show_method_candidates(buf, MethodError(PR16155,(Int64(3), 2.0, Int64(3))))
 test_have_color(buf, "\e[0m\nClosest candidates are:\n  PR16155(::Int64, ::Any)\n  PR16155(::Any, ::Any)\n  PR16155{T}(::Any)\e[0m",
                      "\nClosest candidates are:\n  PR16155(::Int64, ::Any)\n  PR16155(::Any, ::Any)\n  PR16155{T}(::Any)")
 
+method_c6(; x=1) = x
+method_c6(a; y=1) = y
+m_error = try method_c6(y=1) catch e; e; end
+showerror(buf, m_error)
+error_out = takebuf_string(buf)
+m_error = try method_c6(1, x=1) catch e; e; end
+showerror(buf, m_error)
+error_out1 = takebuf_string(buf)
+
+if Base.have_color
+    @test contains(error_out, "method_c6(; x)\e[1m\e[31m got an unsupported keyword argument \"y\"\e[0m")
+    @test contains(error_out, "method_c6(\e[1m\e[31m::Any\e[0m; y)")
+    @test contains(error_out1, "method_c6(::Any; y)\e[1m\e[31m got an unsupported keyword argument \"x\"\e[0m")
+else
+    @test contains(error_out, "method_c6(; x) got an unsupported keyword argument \"y\"")
+    @test contains(error_out, "method_c6(!Matched::Any; y)")
+    @test contains(error_out1, "method_c6(::Any; y) got an unsupported keyword argument \"x\"")
+end
+
+method_c7(a, b; kargs...) = a
+Base.show_method_candidates(buf, MethodError(method_c7, (1, 1)), [(:x, 1), (:y, 2)])
+test_have_color(buf, "\e[0m\nClosest candidates are:\n  method_c7(::Any, ::Any; kargs...)\e[0m",
+                     "\nClosest candidates are:\n  method_c7(::Any, ::Any; kargs...)")
+method_c8(a, b; y=1, w=1) = a
+Base.show_method_candidates(buf, MethodError(method_c8, (1, 1)), [(:x, 1), (:y, 2), (:z, 1), (:w, 1)])
+test_have_color(buf, "\e[0m\nClosest candidates are:\n  method_c8(::Any, ::Any; y, w)\e[1m\e[31m got an unsupported keyword argument \"x\", \"z\"\e[0m\e[0m",
+                     "\nClosest candidates are:\n  method_c8(::Any, ::Any; y, w) got an unsupported keyword argument \"x\", \"z\"")
+
+addConstraint_15639(c::Int32) = c
+addConstraint_15639(c::Int64; uncset=nothing) = addConstraint_15639(Int32(c), uncset=uncset)
+
+Base.show_method_candidates(buf, MethodError(addConstraint_15639, (Int32(1),)), [(:uncset, nothing)])
+test_have_color(buf, "\e[0m\nClosest candidates are:\n  addConstraint_15639(::Int32)\e[1m\e[31m got an unsupported keyword argument \"uncset\"\e[0m\n  addConstraint_15639(\e[1m\e[31m::Int64\e[0m; uncset)\e[0m",
+                     "\nClosest candidates are:\n  addConstraint_15639(::Int32) got an unsupported keyword argument \"uncset\"\n  addConstraint_15639(!Matched::Int64; uncset)")
+
 macro except_str(expr, err_type)
     return quote
         let err = nothing

test/show.jl

@@ -325,10 +325,14 @@ end
 
 f5971(x, y...; z=1, w...) = nothing
 let repr = sprint(io -> show(io,"text/plain", methods(f5971)))
-    @test contains(repr, "f5971(x, y...; z)")
+    @test contains(repr, "f5971(x, y...; z, w...)")
 end
 let repr = sprint(io -> show(io,"text/html", methods(f5971)))
-    @test contains(repr, "f5971(x, y...; <i>z</i>)")
+    @test contains(repr, "f5971(x, y...; <i>z, w...</i>)")
+end
+f16580(x, y...; z=1, w=y+x, q...) = nothing
+let repr = sprint(io -> show(io,"text/html", methods(f16580)))
+    @test contains(repr, "f16580(x, y...; <i>z, w, q...</i>)")
 end
 
 if isempty(Base.GIT_VERSION_INFO.commit)