mirror of
https://github.com/rust-lang/rust.git
synced 2026-04-27 18:57:42 +03:00
Matthias Krüger
0bb15457de
`const` blocks as a `mod` item Tracking issue: rust-lang/rust#149226 This adds support for writing `const { ... }` as an item in a module. In the current implementation, this is a unique AST item that gets lowered to `const _: () = const { ... };` in HIR. rustfmt support included. TODO: - `pub const { ... }` does not make sense (see rust-lang/rust#147136). Reject it. Should this be rejected by the parser or smth? - Improve diagnostics (preferably they should not mention the fake `_` ident).
The rustc_ast crate contains those things concerned purely with syntax
– that is, the AST ("abstract syntax tree"), along with some definitions for tokens and token streams, data structures/traits for mutating ASTs, and shared definitions for other AST-related parts of the compiler (like the lexer and macro-expansion).
For more information about how these things work in rustc, see the rustc dev guide: