8cba0a9073
*Syntactically* permit visibilities on trait items & enum variants Fixes #65041 Suppose we have `$vis trait_item` or `$vis enum_variant` and `$vis` is a `:vis` macro fragment. Before this PR, this would fail to parse. This is now instead allowed as per language team consensus in https://github.com/rust-lang/rust/issues/65041#issuecomment-538105286. (See added tests for elaboration.) Moreover, we now also permit visibility modifiers on trait items & enum variants *syntactically* but reject them with semantic checks (in `ast_validation`): ```rust #[cfg(FALSE)] trait Foo { pub fn bar(); } // OK #[cfg(FALSE)] enum E { pub U } // OK ``` |
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| .. | ||
| ast | ||
| attr | ||
| diagnostics | ||
| expand | ||
| feature_gate | ||
| util | ||
| ast.rs | ||
| build.rs | ||
| Cargo.toml | ||
| early_buffered_lints.rs | ||
| entry.rs | ||
| lib.rs | ||
| mut_visit.rs | ||
| ptr.rs | ||
| README.md | ||
| sess.rs | ||
| show_span.rs | ||
| token.rs | ||
| tokenstream.rs | ||
| visit.rs | ||
The syntax crate contains those things concerned purely with syntax
– that is, the AST ("abstract syntax tree"), parser, pretty-printer,
lexer, macro expander, and utilities for traversing ASTs.
For more information about how these things work in rustc, see the rustc guide: