Tracking Issue for fn const BuildHasherDefault::new()

[krtab]

Feature gate: #![feature(build_hasher_default_const_new)]

This is a tracking issue for a new new class method for BuildHasherDefault. It allows creating a BuildHasherDefault in const contexts.
Because HashMap::with_hasher constness is being stabilized in #118427 this will in turn allow creating empty HashMap<K,V,BuildHasherDefault<H>> in const context for any H: Default + Hasher.

Public API

impl<H> BuildHasherDefault<H> {
    pub const fn new() -> Self;
}

Steps / History

• Implementation: Add fn const BuildHasherDefault::new #123198
• Final comment period (FCP)¹
• Stabilization PR

Unresolved Questions

• None yet.

@rustbot claim

Footnotes

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