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8f43b85954
Rollup of 8 pull requests Successful merges: - #137653 (Deprecate the unstable `concat_idents!`) - #138957 (Update the index of Option to make the summary more comprehensive) - #140006 (ensure compiler existance of tools on the dist step) - #140143 (Move `sys::pal::os::Env` into `sys::env`) - #140202 (Make #![feature(let_chains)] bootstrap conditional in compiler/) - #140236 (norm nested aliases before evaluating the parent goal) - #140257 (Some drive-by housecleaning in `rustc_borrowck`) - #140278 (Don't use item name to look up associated item from trait item) r? `@ghost` `@rustbot` modify labels: rollup |
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| Cargo.toml | ||
| README.md | ||
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: