Tracking Issue for `feature(const_fn_trait_ref_impls)`

[onestacked]

Feature gate: #![feature(const_fn_trait_ref_impls)]

This is a tracking issue for the implementation of const Fn* on references of const Fn* Items.

Public API

impl<A, F: ?Sized> const Fn*<A> for &(mut) F
    where
        F: ~const Fn*<A>;

Steps / History

• Implementation: Constify impl Fn* &(mut) Fn* #101802
• Final comment period (FCP)¹
• Stabilization PR

Unresolved Questions

• None yet.

Footnotes

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

[raldone01]

cc @fee1-dead
This feature is awesome.
However I noticed that it works without using the feature gate at all.
I create a minimal repo to reproduce:
https://github.com/raldone01/const_fn_trait_ref_impls_feature_gate_not_required_question_mark

[fee1-dead]

These feature gates do not actually matter, as they will be insta-stable after const_trait_impl gets stable. As long as you are not able to use this without having const_trait_impl enabled, it is fine.

[RalfJung]

This got removed in #110393