Tracking issue for Vec::retain_mut and VecDeque::retain_mut

[GuillaumeGomez]

Feature gate: #![feature(vec_retain_mut)]

This is a tracking issue for adding the retain_mut method on Vec.

It'll provide a retain_mut method on the Vec and on the VecDeque types. It is the equivalent of the Vec::retain and VecDeque methods except that it'll expect a closure with a mutable argument instead of a const one. It'll allow to modify the elements of an array while filtering which elements we want to keep.

Public API

pub fn retain_mut<F>(&mut self, mut f: F)
    where
        F: FnMut(&mut T) -> bool;

Steps / History

• Implementation: Add Vec::retain_mut #90772 and Implement VecDeque::retain_mut #91215
• Final comment period (FCP)
• Stabilization PR

Unresolved Questions

None

[crumblingstatue]

Thank you! It's nice not to have to use a crate for this simple functionality.

[upsuper]

As I mentioned in #90772 (comment) maybe we should add this for VecDeque as well.

[GuillaumeGomez]

I'll send a PR and we'll see if the libs team will agree or not. I'll update the issue afterward.