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Update the index of Option to make the summary more comprehensive #138957

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27 changes: 25 additions & 2 deletions library/core/src/option.rs
Original file line number Diff line number Diff line change
Expand Up @@ -159,11 +159,24 @@
//!
//! ## Querying the variant
//!
//! The [`is_some`] and [`is_none`] methods return [`true`] if the [`Option`]
//! is [`Some`] or [`None`], respectively.
//! The [`is_some`] and [`is_none`] methods take a borrow of the [`Option`]
//! and return [`true`] if the [`Option`] is [`Some`] or [`None`], respectively.
//!
//! The [`is_some_and`] and [`is_none_or`] methods take ownership of the [`Option`]
//! and apply the provided function to make a decision.
//! The methods return the same boolean value as the function returns.
//!
//! [`is_none`]: Option::is_none
//! [`is_some`]: Option::is_some
//! [`is_some_and`]: Option::is_some_and
//! [`is_none_or`]: Option::is_none_or
//!
//! ## Inspecting the variant
//!
//! The [`inspect`] method takes ownership of the [`Option`]
//! and applies the provided function to the contained value by reference if [`Some`]
//!
//! [`inspect`]: Option::inspect
//!
//! ## Adapters for working with references
//!
Expand All @@ -177,6 +190,10 @@
//! <code>[Option]<[Pin]<[&]T>></code>
//! * [`as_pin_mut`] converts from <code>[Pin]<[&mut] [Option]\<T>></code> to
//! <code>[Option]<[Pin]<[&mut] T>></code>
//! * [`as_slice`] returns a slice of the contained value, if any.
//! If this is [`None`], an empty slice is returned.
//! * [`as_mut_slice`] returns a mutable slice of the contained value, if any.
//! If this is [`None`], an empty slice is returned.
//!
//! [&]: reference "shared reference"
//! [&mut]: reference "mutable reference"
Expand All @@ -187,6 +204,8 @@
//! [`as_pin_mut`]: Option::as_pin_mut
//! [`as_pin_ref`]: Option::as_pin_ref
//! [`as_ref`]: Option::as_ref
//! [`as_slice`]: Option::as_slice
//! [`as_mut_slice`]: Option::as_mut_slice
//!
//! ## Extracting the contained value
//!
Expand All @@ -200,12 +219,16 @@
//! (which must implement the [`Default`] trait)
//! * [`unwrap_or_else`] returns the result of evaluating the provided
//! function
//! * [`unwrap_unchecked`] returns the contained value, without checking
//! calling this method on None is *[undefined behavior]*
//!
//! [`expect`]: Option::expect
//! [`unwrap`]: Option::unwrap
//! [`unwrap_or`]: Option::unwrap_or
//! [`unwrap_or_default`]: Option::unwrap_or_default
//! [`unwrap_or_else`]: Option::unwrap_or_else
//! [`unwrap_unchecked`]: Option::unwrap_unchecked
//! [undefined behavior]: https://doc.rust-lang.org/reference/behavior-considered-undefined.html
//!
//! ## Transforming contained values
//!
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