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std: Add ToString trait specialization for Cow<'a, str> and String

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r? @bluss
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f001 2017-02-01 11:54:36 +08:00
parent 24055d0f2a
commit dfcca546fc
1 changed files with 16 additions and 0 deletions
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16
src/libcollections/string.rs
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@ -1866,6 +1866,22 @@ impl ToString for str {
}
}
#[stable(feature = "cow_str_to_string_specialization", since = "1.17.0")]
impl<'a> ToString for Cow<'a, str> {
#[inline]
fn to_string(&self) -> String {
self[..].to_owned()
}
}
#[stable(feature = "string_to_string_specialization", since = "1.17.0")]
impl ToString for String {
#[inline]
fn to_string(&self) -> String {
self.to_owned()
}
}
#[stable(feature = "rust1", since = "1.0.0")]
impl AsRef<str> for String {
#[inline]