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Rollup merge of #132388 - frank-king:feature/where-cfg, r=petrochenkov

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Implement `#[cfg]` in `where` clauses

This PR implements #115590, which supports `#[cfg]` attributes in `where` clauses.

The biggest change is, that it adds `AttrsVec` and  `NodeId` to the `ast::WherePredicate` and `HirId` to the `hir::WherePredicate`.
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Matthias Krüger 2025-03-03 10:40:56 +01:00 • committed by GitHub
commit 2344a34241
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38 changed files with 3296 additions and 88 deletions
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compiler/rustc_feature/src/unstable.rs
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@ -661,6 +661,8 @@ declare_features! (
(unstable, unsized_tuple_coercion, "1.20.0", Some(42877)),
/// Allows using the `#[used(linker)]` (or `#[used(compiler)]`) attribute.
(unstable, used_with_arg, "1.60.0", Some(93798)),
/// Allows use of attributes in `where` clauses.
(unstable, where_clause_attrs, "CURRENT_RUSTC_VERSION", Some(115590)),
/// Allows use of x86 `AMX` target-feature attributes and intrinsics
(unstable, x86_amx_intrinsics, "1.81.0", Some(126622)),
/// Allows use of the `xop` target-feature