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futures-util: make Mutex::new() const #2956

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futures-util: make Mutex::new() const #2956

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@jstarks jstarks commented May 31, 2025

This builds with the MSRV (1.68) and is convenient for creating static mutexes.

This does bind the implementation to never allocate in new in the future, but that seems like a desirable property anyway.

Note that this also requires updating slab to 0.4.7, which is the first version that supports const Slab::new().

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futures-util: make Mutex::new() const
3d47d63 
This builds with the MSRV (1.68) and is convenient for creating `static`
mutexes.

This does bind the implementation to never allocate in `new` in the
future, but that seems like a desirable property anyway.

Note that this also requires updating slab to 0.4.7, which is the first
version that supports const `Slab::new()`.
@rustbot rustbot added A-lock Area: futures::lock S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 31, 2025
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