Tracking Issue for the `Freeze` trait
Open
@traviscross is already working on this.
Since Mar 4, 2025.
B-experimental
C-tracking-issue
F-freeze
T-lang
T-libs
- Dominant language
- Rust
- Stars
- 119k
- Forks
- 16.1k
- PR merge metrics
- PR metrics pending
Description
Feature gate: #![feature(freeze)]
This is a tracking issue for the core::marker::Freeze trait
This trait allows generic code to restrict generic parameters to types without interior mutability.
Public API
use std::marker::Freeze;
trait Trait<T: Freeze + 'static> {
const VALUE: T;
const VALUE_REF: &'static T = &Self::VALUE;
}
Steps / History
- Implementation: #121840
- Final comment period (FCP)^1
- Stabilization PR
Unresolved Questions
- naming the trait differently (see #121501 (comment))
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
This issue has not been assessed yet.