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use crate::borrow::Cow; use core::iter::FromIterator; use super::Vec; #[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)) } }