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Some<T> is not a type, etc

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Taylor Yu 2021-06-22 15:35:14 -05:00
parent 9a00fd049b
commit 771f35ce84
1 changed files with 23 additions and 13 deletions
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36
library/core/src/option.rs
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@ -144,25 +144,35 @@
//!
//! ## Transforming contained values
//!
//! These transformations are from [`Option`] to [`Result`].
//!
//! * [`ok_or`] transforms [`Some(v)`] to [`Ok(v)`], and [`None`] to
//! [`Err(err)`] using the provided default `err` value
//! * [`ok_or_else`] transforms [`Some(v)`] to [`Ok(v)`], and [`None`] to
//! a value of [`Err`] using the provided function
//! * [`transpose`] transposes an [`Option`] of a [`Result`] into a
//! [`Result`] of an [`Option`]
//!
//! These transformations are on [`Some`] values.
//!
//! * [`filter`] calls the provided predicate function on the contained
//! value `t` if the [`Option`] is [`Some(t)`], and returns [`Some(t)`]
//! if the function returns `true`; otherwise, returns [`None`]
//! * [`flatten`] removes one level of nesting from an
//! [`Option<Option<T>>`]
//! * [`map`] transforms [`Some<T>`] to [`Some<U>`] using the provided
//! * [`map`] transforms [`Option<T>`] to [`Option<U>`] by applying the
//! provided function to the contained value of [`Some`] and leaving
//! [`None`] values unchanged
//! * [`map_or`] transforms [`Option<T>`] to a value of `U` by applying the
//! provided function to the contained value of [`Some`], or transforms
//! [`None`] to a provided default value of `U`
//! * [`map_or_else`] transforms [`Option<T>`] to a value of `U` by
//! applying the provided function to the contained value of [`Some`], or
//! transforms [`None`] to a value of `U` using a provided fallback
//! function
//! * [`map_or`] transforms [`Some<T>`] to a value of `U` using the
//! provided function, or transforms [`None`] to a provided default value
//! of `U`
//! * [`map_or_else`] transforms [`Some<T>`] to a value of `U` using the
//! provided function, or transforms [`None`] to a value of `U` using
//! another provided function
//! * [`ok_or`] transforms [`Some(v)`] to [`Ok(v)`], and [`None`] to
//! [`Err(err)`] using the provided default `err` value
//! * [`ok_or_else`] transforms [`Some(v)`] to [`Ok(v)`], and [`None`] to
//! a value of [`Err<E>`] using the provided function
//! * [`transpose`] transposes an [`Option`] of a [`Result`] into a
//! [`Result`] of an [`Option`]
//!
//! These transformations combine two [`Some`] values.
//!
//! * [`zip`] returns [`Some((s, o))`] if `self` is [`Some(s)`] and the
//! provided [`Option`] value is [`Some(o)`]; otherwise, returns [`None`]
//! * [`zip_with`] calls the provided function `f` and returns