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Rollup merge of rust-lang#99736 - lopopolo:lopopolo/rust-langgh-80996-…
…partial-stabilization-bounds-as-ref, r=dtolnay 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: // rust-lang#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: // rust-lang#80996 match self.end { Bound::Included(ref bound) => Bound::Included(bound), Bound::Excluded(ref bound) => Bound::Excluded(bound), Bound::Unbounded => Bound::Unbounded, } } } ``` See: - rust-lang#80996 - rust-lang#80996 (comment) cc `@yaahc` who suggested partial stabilization.
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