stabilize const_cell #137928
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stabilize const_cell #137928
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stabilize const_cell
`@rust-lang/libs-api` `@rust-lang/wg-const-eval` I see no reason to wait any longer, so I propose we stabilize the use of `Cell` in `const fn` -- specifically the APIs listed here:
```rust
// core::cell
impl<T> Cell<T> {
pub const fn replace(&self, val: T) -> T;
}
impl<T: Copy> Cell<T> {
pub const fn get(&self) -> T;
}
impl<T: ?Sized> Cell<T> {
pub const fn get_mut(&mut self) -> &mut T;
pub const fn from_mut(t: &mut T) -> &Cell<T>;
}
impl<T> Cell<[T]> {
pub const fn as_slice_of_cells(&self) -> &[Cell<T>];
}
```
Unfortunately, `set` cannot be made `const fn` yet as it drops the old contents.
Fixes rust-lang#131283
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…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#137928 (stabilize const_cell) - rust-lang#138431 (Fix `uclibc` LLVM target triples) - rust-lang#138832 (Start using `with_native_path` in `std::sys::fs`) - rust-lang#139060 (replace commit placeholder in vendor status with actual commit) - rust-lang#139081 (std: deduplicate `errno` accesses) - rust-lang#139100 (compiletest: Support matching diagnostics on lines below) - rust-lang#139105 (`BackendRepr::is_signed`: comment why this may panics) - rust-lang#139106 (Mark .pp files as Rust) r? `@ghost` `@rustbot` modify labels: rollup
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…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#137928 (stabilize const_cell) - rust-lang#138431 (Fix `uclibc` LLVM target triples) - rust-lang#138832 (Start using `with_native_path` in `std::sys::fs`) - rust-lang#139081 (std: deduplicate `errno` accesses) - rust-lang#139100 (compiletest: Support matching diagnostics on lines below) - rust-lang#139105 (`BackendRepr::is_signed`: comment why this may panics) - rust-lang#139106 (Mark .pp files as Rust) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#137928 - RalfJung:const_cell, r=m-ou-se stabilize const_cell ``@rust-lang/libs-api`` ``@rust-lang/wg-const-eval`` I see no reason to wait any longer, so I propose we stabilize the use of `Cell` in `const fn` -- specifically the APIs listed here: ```rust // core::cell impl<T> Cell<T> { pub const fn replace(&self, val: T) -> T; } impl<T: Copy> Cell<T> { pub const fn get(&self) -> T; } impl<T: ?Sized> Cell<T> { pub const fn get_mut(&mut self) -> &mut T; pub const fn from_mut(t: &mut T) -> &Cell<T>; } impl<T> Cell<[T]> { pub const fn as_slice_of_cells(&self) -> &[Cell<T>]; } ``` Unfortunately, `set` cannot be made `const fn` yet as it drops the old contents. Fixes rust-lang#131283
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stabilize const_cell
``@rust-lang/libs-api`` ``@rust-lang/wg-const-eval`` I see no reason to wait any longer, so I propose we stabilize the use of `Cell` in `const fn` -- specifically the APIs listed here:
```rust
// core::cell
impl<T> Cell<T> {
pub const fn replace(&self, val: T) -> T;
}
impl<T: Copy> Cell<T> {
pub const fn get(&self) -> T;
}
impl<T: ?Sized> Cell<T> {
pub const fn get_mut(&mut self) -> &mut T;
pub const fn from_mut(t: &mut T) -> &Cell<T>;
}
impl<T> Cell<[T]> {
pub const fn as_slice_of_cells(&self) -> &[Cell<T>];
}
```
Unfortunately, `set` cannot be made `const fn` yet as it drops the old contents.
Fixes rust-lang#131283
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Apr 2, 2025
…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#137928 (stabilize const_cell) - rust-lang#138431 (Fix `uclibc` LLVM target triples) - rust-lang#138832 (Start using `with_native_path` in `std::sys::fs`) - rust-lang#139081 (std: deduplicate `errno` accesses) - rust-lang#139100 (compiletest: Support matching diagnostics on lines below) - rust-lang#139105 (`BackendRepr::is_signed`: comment why this may panics) - rust-lang#139106 (Mark .pp files as Rust) r? `@ghost` `@rustbot` modify labels: rollup
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@rust-lang/libs-api @rust-lang/wg-const-eval I see no reason to wait any longer, so I propose we stabilize the use of
Cellinconst fn-- specifically the APIs listed here:Unfortunately,
setcannot be madeconst fnyet as it drops the old contents.Fixes #131283