2ed716a81d
Partially stabilize `bound_as_ref` by stabilizing `Bound::as_ref`
Stabilizing `Bound::as_ref` will simplify the implementation for `RangeBounds<usize>` for custom range types:
```rust
impl RangeBounds<usize> for Region {
fn start_bound(&self) -> Bound<&usize> {
// TODO: Use `self.start.as_ref()` when upstream `std` stabilizes:
// https://github.com/rust-lang/rust/issues/80996
match self.start {
Bound::Included(ref bound) => Bound::Included(bound),
Bound::Excluded(ref bound) => Bound::Excluded(bound),
Bound::Unbounded => Bound::Unbounded,
}
}
fn end_bound(&self) -> Bound<&usize> {
// TODO: Use `self.end.as_ref()` when upstream `std` stabilizes:
// https://github.com/rust-lang/rust/issues/80996
match self.end {
Bound::Included(ref bound) => Bound::Included(bound),
Bound::Excluded(ref bound) => Bound::Excluded(bound),
Bound::Unbounded => Bound::Unbounded,
}
}
}
```
See:
- #80996
- https://github.com/rust-lang/rust/issues/80996#issuecomment-1194575470
cc `@yaahc` who suggested partial stabilization.
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