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improve doc of into_boxed_slice and impl From<Vec<T>> for Box<[T]> #105032

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Dec 3, 2022
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improve doc of into_boxed_slice and impl From<Vec<T>> for Box<[T]> #105032

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11 changes: 10 additions & 1 deletion library/alloc/src/vec/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1070,7 +1070,8 @@ impl<T, A: Allocator> Vec<T, A> {

/// Converts the vector into [`Box<[T]>`][owned slice].
///
/// Note that this will drop any excess capacity.
/// If the vector has excess capacity, its items will be moved into a
/// newly-allocated buffer with exactly the right capacity.
///
/// [owned slice]: Box
///
Expand Down Expand Up @@ -3223,6 +3224,14 @@ impl<T, A: Allocator> From<Vec<T, A>> for Box<[T], A> {
/// ```
/// assert_eq!(Box::from(vec![1, 2, 3]), vec![1, 2, 3].into_boxed_slice());
/// ```
///
/// Any excess capacity is removed:
/// ```
/// let mut vec = Vec::with_capacity(10);
/// vec.extend([1, 2, 3]);
///
/// assert_eq!(Box::from(vec), vec![1, 2, 3].into_boxed_slice());
/// ```
fn from(v: Vec<T, A>) -> Self {
v.into_boxed_slice()
}
Expand Down