Tracking Issue for `new_range_end_bound`

Feature gate: #![feature(new_range_end_bound)]

This is a tracking issue for https://github.com/rust-lang/libs-team/issues/653

Public API

Before

// core::range
struct RangeInclusive<T>;
struct Range<T>;

// core::ops
trait RangeBounds<T: ?Sized> {
    fn start_bound(&self) -> Bound<&T>;

    fn end_bound(&self) -> Bound<&T>;
}

After

// core::range
struct RangeInclusive<Start, End = Start>;
struct Range<Start, End = Start>;

// core::ops
trait RangeBounds<Start: ?Sized, End: ?Sized = Start> {
    fn start_bound(&self) -> Bound<&Start>;

    fn end_bound(&self) -> Bound<&End>;
}

Steps / History

(Remember to update the S-tracking-* label when checking boxes.)

• ACP: https://github.com/rust-lang/libs-team/issues/653#issuecomment-4270111333
• Implementation: https://github.com/rust-lang/rust/pull/155457/changes
• Final comment period (FCP)^1
• Stabilization PR

Unresolved Questions

• None yet.

Start with the public API section and the linked ACP and implementation PR for the new_range_end_bound feature. Follow the listed lifecycle steps; completion requires the implementation, final comment period, and stabilization PR to be addressed.