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Clarify docs for Vec::into_boxed_slice, Vec::shrink_to_fit

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invpt 2024-01-18 14:40:56 -05:00
parent 8424f8e8cd
commit 35a9fc3472
1 changed files with 12 additions and 7 deletions
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19
library/alloc/src/vec/mod.rs
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@ -358,7 +358,7 @@ mod spec_extend;
///
/// `vec![x; n]`, `vec![a, b, c, d]`, and
/// [`Vec::with_capacity(n)`][`Vec::with_capacity`], will all produce a `Vec`
/// with exactly the requested capacity. If <code>[len] == [capacity]</code>,
/// with at least the requested capacity. If <code>[len] == [capacity]</code>,
/// (as is the case for the [`vec!`] macro), then a `Vec<T>` can be converted to
/// and from a [`Box<[T]>`][owned slice] without reallocating or moving the elements.
///
@ -1023,8 +1023,11 @@ impl<T, A: Allocator> Vec<T, A> {
/// Shrinks the capacity of the vector as much as possible.
///
/// It will drop down as close as possible to the length but the allocator
/// may still inform the vector that there is space for a few more elements.
/// The behavior of this method depends on the allocator, which may either shrink the vector
/// in-place or reallocate. The resulting vector might still have some excess capacity, just as
/// is the case for [`with_capacity`]. See [`Allocator::shrink`] for more details.
///
/// [`with_capacity`]: Vec::with_capacity
///
/// # Examples
///
@ -1074,10 +1077,10 @@ impl<T, A: Allocator> Vec<T, A> {
/// Converts the vector into [`Box<[T]>`][owned slice].
///
/// If the vector has excess capacity, its items will be moved into a
/// newly-allocated buffer with exactly the right capacity.
/// Before doing the conversion, this method discards excess capacity like [`shrink_to_fit`].
///
/// [owned slice]: Box
/// [`shrink_to_fit`]: Vec::shrink_to_fit
///
/// # Examples
///
@ -3290,8 +3293,10 @@ impl<T, A: Allocator> From<Box<[T], A>> for Vec<T, A> {
impl<T, A: Allocator> From<Vec<T, A>> for Box<[T], A> {
/// Convert a vector into a boxed slice.
///
/// If `v` has excess capacity, its items will be moved into a
/// newly-allocated buffer with exactly the right capacity.
/// Before doing the conversion, this method discards excess capacity like [`Vec::shrink_to_fit`].
///
/// [owned slice]: Box
/// [`Vec::shrink_to_fit`]: Vec::shrink_to_fit
///
/// # Examples
///