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Implement From for more types on Cow

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George Burton 2018-04-22 22:57:52 +01:00
parent ff48277add
commit 1133a149f1
5 changed files with 71 additions and 0 deletions
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7
src/liballoc/vec.rs
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@ -2285,6 +2285,13 @@ impl<'a, T: Clone> From<Vec<T>> for Cow<'a, [T]> {
}
}
#[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]> {