rust/library/std/src/sync/lazy_lock, branch 1.85.1

Fix std tests for wasm32-wasip2 target

2024-09-29T02:48:13+00:00

Implement ACP 429: add `Lazy{Cell,Lock}::get[_mut]` and `force_mut`

2024-09-17T16:40:34+00:00

In the implementation of `force_mut`, I chose performance over safety. For `LazyLock` this isn't really a choice; the code has to be unsafe. But for `LazyCell`, we can have a full-safe implementation, but it will be a bit less performant, so I went with the unsafe approach.

Reformat `use` declarations.

2024-07-28T22:26:52+00:00

The previous commit updated `rustfmt.toml` appropriately. This commit is the outcome of running `x fmt --all` with the new formatting options.

More inference-friendly API for lazy

2022-10-29T08:56:20+00:00

The signature for new was ``` fn new(f: F) -> Lazy ``` Notably, with `F` unconstrained, `T` can be literally anything, and just `let _ = Lazy::new(|| 92)` would not typecheck. This historiacally was a necessity -- `new` is a `const` function, it couldn't have any bounds. Today though, we can move `new` under the `F: FnOnce() -> T` bound, which gives the compiler enough data to infer the type of T from closure.

Move/rename `lazy::Sync{OnceCell,Lazy}` to `sync::{Once,Lazy}Lock`

2022-06-16T15:54:42+00:00