Tracking Issue for `core::cell::{Ref,RefMut}::try_map`

[GrigorenkoPV]

Feature gate: #![feature(refcell_try_map)]

This is a tracking issue for core::cell::{Ref,RefMut}::try_map

Public API

impl<'b, T> Ref<'b, T> {
    pub fn try_map<U: ?Sized>(
        orig: Ref<'b, T>,
        f: impl for<'a> FnOnce(&'a T) -> impl Try<
            Output = &'a U,
            Residual: Residual<Ref<'b, U>>,
        >,
    ) -> Result<Ref<'b, U>>;
}

impl<'b, T> RefMut<'b, T> {
    pub fn try_map<U: ?Sized>(
        orig: RefMut<'b, T>,
        f: impl for<'a> FnOnce(&'a mut T) -> impl Try<
            Output = &'a mut U,
            Residual: Residual<RefMut<'b, U>>,
        >,
    ) -> impl Try<Output = RefMut<'b, U>>;
}

Steps / History

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

• Implementation: Add Ref/RefMut try_map method #118087
• First ACP: ACP: Add {Ref,RefMut}::try_map method  libs-team#341 (ignored)
• Second ACP: ACP: std::cell::{Ref,RefMut}::try_map libs-team#586 (accepted)
• Final comment period (FCP)¹
• Stabilization PR

Unresolved Questions

• None yet.

Footnotes

1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩