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Implement macro meta-variable expressions

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Caio 2022-03-09 16:46:23 -03:00
parent 10dccdc7fc
commit 8073a88f35
17 changed files with 900 additions and 44 deletions
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2
compiler/rustc_feature/src/active.rs
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@ -426,6 +426,8 @@ declare_features! (
(active, link_cfg, "1.14.0", Some(37406), None),
/// Allows using `reason` in lint attributes and the `#[expect(lint)]` lint check.
(active, lint_reasons, "1.31.0", Some(54503), None),
/// Give access to additional metadata about declarative macro meta-variables.
(active, macro_metavar_expr, "1.61.0", Some(83527), None),
/// Allows `#[marker]` on certain traits allowing overlapping implementations.
(active, marker_trait_attr, "1.30.0", Some(29864), None),
/// A minimal, sound subset of specialization intended to be used by the