Announce Rust 1.89.0 #1666
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Announce Rust 1.89.0 #1666
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Hi relnotes-interest-group, this PR adds a release blog post. Could you review cc @alex-semenyuk @jieyouxu @joshtriplett @Kobzol @lcnr @traviscross |
BoxyUwU
commented
Jul 24, 2025
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| The `target_feature` attribute now supports the `sha512`, `sm3`, `sm4`, `kl` and `widekl` target features on x86. Additionally a number of `avx512` intrinsics and target features are also supported on x86: | ||
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| ```rust | ||
| #[target_feature(enable = "avx512bw")] | ||
| pub fn cool_simd_code(/* .. */) -> /* ... */ { | ||
| /* ... */ | ||
| } | ||
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| ``` |
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Also specify that all avx512 intrinsics in std::arch::{x86,x86_64} are stable now (same for the other target features).
Edit: nvm I didn't see it right
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| ### Explicitly inferred arguments to const generics | ||
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| Rust now supports `_` as an argument to const generic parameters, inferring the value from surrounding context: | ||
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| ```rust | ||
| pub fn make_bitset<const LEN: usize>() -> [bool; LEN] { | ||
| [false; _] | ||
| } | ||
| ``` | ||
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| Similar to the rules for when `_` is permitted as a type, `_` is not permitted as an argument to const generics when in a signature: | ||
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| ```rust | ||
| // This is not allowed | ||
| pub fn make_bitset<const LEN: usize>() -> [bool; _] { | ||
| [false; LEN] | ||
| } | ||
| ``` |
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cc @rust-lang/project-const-generics
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Still need to write something up for this
cc @rust-lang/release
@rustbot ping relnotes-interest-group
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