Tracking Issue for slice::Split::as_slice()

[JulianKnodt]

Feature gate: #![feature(split_as_slice)]

This is a tracking issue for:

Converting an iterator produced by .split(...) which is not fully consumed, into a slice, matching the APIs for .split(...) on Strings.

Public API

let a = [1,2,3];
let mut iter = a.split(|i| i == 2);
assert!(iter.next().is_some());
assert_eq!(iter.as_slice(), &[3]);

Steps / History

• Implementation: Add core::slice::Split::as_slice #92287
• Final comment period (FCP)
• Stabilization PR

Unresolved Questions

Add impl:

#[stable(feature = "split_as_slice", since = "1.0.0")]
impl<'a, T: 'a, P: FnMut(&T) -> bool> AsRef<[T]> for Split<'a, T, P> {
    fn as_ref(&self) -> &'a [T] {
        self.as_slice()
    }
}

[clarfonthey]

Is there anything in particular blocking this from stabilisation? It's been on stable for over a year.

[dtolnay]

This method was renamed from the originally proposed name core::slice::Split::remainder to as_slice as an outcome of the discussion under #92287 (comment), in which a key factor was consistency with core::str::Split::as_str.

At the same time, core::str::Split::as_str got renamed to remainder in #95644, citing that "the as_str name was confusing to users". Tracking issue: #77998

I would want this assessed and reconciled before proposing either stabilization.