Jonas Schievink 054c29d22c Rollup merge of #80279 - Yaulendil:str-as-mut, r=m-ou-se ... Implement missing `AsMut<str>` for `str` Allows `&mut str` to be taken by a Generic which requires `T` such that `T: AsMut<str>`. Motivating example: ```rust impl<'i, T> From<T> for StructImmut<'i> where T: AsRef<str> + 'i, { fn from(asref: T) -> Self { let string: &str = asref.as_ref(); // ... } } impl<'i, T> From<T> for StructMut<'i> where T: AsMut<str> + 'i, { fn from(mut asmut: T) -> Self { let string: &mut str = asmut.as_mut(); // ... } } ``` The Immutable form of this structure can be constructed by `StructImmut::from(s)` where `s` may be a `&String` or a `&str`, because `AsRef<str>` is implemented for `str`. However, the mutable form of the structure can be constructed in the same way **only** with a `&mut String`, and **not** with a `&mut str`. This change does have some precedent, because as can be seen in [the Implementors](https://doc.rust-lang.org/std/convert/trait.AsMut.html#implementors), `AsMut<[T]>` is implemented for `[T]` as well as for `Vec<T>`, but `AsMut<str>` is implemented only for `String`. This would complete the symmetry. As a trait implementation, this should be immediately stable.		2021-01-31 01:47:23 +01:00
..
benches	Add more benchmarks	2021-01-08 09:50:35 +00:00
src	Rollup merge of #80279 - Yaulendil:str-as-mut, r=m-ou-se	2021-01-31 01:47:23 +01:00
tests	Rollup merge of #81306 - SkiFire13:fuse-flatten, r=cuviper	2021-01-29 09:17:36 +09:00
Cargo.toml	mv std libs to library/	2020-07-27 19:51:13 -05:00