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| author | Jacob Pratt <jacob@jhpratt.dev> | 2024-03-11 03:47:19 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-03-11 03:47:19 -0400 |
| commit | 05f22c3614e700922927b87929fe56f957dcea87 (patch) | |
| tree | 0e773b36bf9e6cd688a6fae2eef8a00658dd2b7d /compiler/rustc_codegen_gcc | |
| parent | 1a989e0757e21e19fcaf318eabfe5c941e5dbe11 (diff) | |
| parent | 78492307406520214f24ce2519f3891f0048bf8e (diff) | |
| download | rust-05f22c3614e700922927b87929fe56f957dcea87.tar.gz rust-05f22c3614e700922927b87929fe56f957dcea87.zip | |
Rollup merge of #121840 - oli-obk:freeze, r=dtolnay
Expose the Freeze trait again (unstably) and forbid implementing it manually non-emoji version of https://github.com/rust-lang/rust/pull/121501 cc #60715 This trait is useful for generic constants (associated consts of generic traits). See the test (`tests/ui/associated-consts/freeze.rs`) added in this PR for a usage example. The builtin `Freeze` trait is the only way to do it, users cannot work around this issue. It's also a useful trait for building some very specific abstrations, as shown by the usage by the `zerocopy` crate: https://github.com/google/zerocopy/issues/941 cc ```@RalfJung``` T-lang signed off on reexposing this unstably: https://github.com/rust-lang/rust/pull/121501#issuecomment-1969827742
Diffstat (limited to 'compiler/rustc_codegen_gcc')
| -rw-r--r-- | compiler/rustc_codegen_gcc/example/mini_core.rs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_codegen_gcc/example/mini_core.rs b/compiler/rustc_codegen_gcc/example/mini_core.rs index cc3d647c8c8..a868471ed1d 100644 --- a/compiler/rustc_codegen_gcc/example/mini_core.rs +++ b/compiler/rustc_codegen_gcc/example/mini_core.rs @@ -1,6 +1,6 @@ #![feature( no_core, lang_items, intrinsics, unboxed_closures, type_ascription, extern_types, - decl_macro, rustc_attrs, transparent_unions, auto_traits, + decl_macro, rustc_attrs, transparent_unions, auto_traits, freeze_impls, thread_local )] #![no_core] |