alloc: Add Borrow impls for &String, &mut String, &Vec, and &mut Vec #45808
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This patch addresses a small papercut, where the auto-ref/deref
does not work well with generic types. One small example of this
is:
Without this patch, rust will error with:
This forces users to use
x.as_slice()
to get the code to compile.This patch then implements the following to cut down on unnecessary
line noise:
Borrow<str>
for&String
,&mut String
BorrowMut<str>
forString
and&mut String
Borrow<[T]>
for&Vec<T>
and&mut Vec<T>
BorrowMut<[T]>
for&mut Vec<T>