bjoernager/rust
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refactor: moved Vec impl Cow into cow.rs

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C 2020-12-05 00:17:25 +00:00
parent 6bf9608f9f
commit 2580822b91
2 changed files with 37 additions and 35 deletions
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37
library/alloc/src/vec/mod.rs
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@ -89,6 +89,8 @@ pub use self::drain::Drain;
mod drain;
mod cow;
/// A contiguous growable array type, written `Vec<T>` but pronounced 'vector'.
///
/// # Examples
@ -3013,41 +3015,6 @@ impl<T, A: Allocator, const N: usize> TryFrom<Vec<T, A>> for [T; N] {
}
}
////////////////////////////////////////////////////////////////////////////////
// Clone-on-write
////////////////////////////////////////////////////////////////////////////////
#[stable(feature = "cow_from_vec", since = "1.8.0")]
impl<'a, T: Clone> From<&'a [T]> for Cow<'a, [T]> {
fn from(s: &'a [T]) -> Cow<'a, [T]> {
Cow::Borrowed(s)
}
}
#[stable(feature = "cow_from_vec", since = "1.8.0")]
impl<'a, T: Clone> From<Vec<T>> for Cow<'a, [T]> {
fn from(v: Vec<T>) -> Cow<'a, [T]> {
Cow::Owned(v)
}
}
#[stable(feature = "cow_from_vec_ref", since = "1.28.0")]
impl<'a, T: Clone> From<&'a Vec<T>> for Cow<'a, [T]> {
fn from(v: &'a Vec<T>) -> Cow<'a, [T]> {
Cow::Borrowed(v.as_slice())
}
}
#[stable(feature = "rust1", since = "1.0.0")]
impl<'a, T> FromIterator<T> for Cow<'a, [T]>
where
T: Clone,
{
fn from_iter<I: IntoIterator<Item = T>>(it: I) -> Cow<'a, [T]> {
Cow::Owned(FromIterator::from_iter(it))
}
}
////////////////////////////////////////////////////////////////////////////////
// Iterators
////////////////////////////////////////////////////////////////////////////////