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rust/compiler/rustc_ast
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bors 195e931b02 Auto merge of #91945 - matthiaskrgr:rollup-jszf9zp, r=matthiaskrgr 
Rollup of 7 pull requests

Successful merges:

 - #90939 (Tweak errors coming from `for`-loop, `?` and `.await` desugaring)
 - #91859 (Iterator::cycle() — document empty iterator special case)
 - #91868 (Use `OutputFilenames` to generate output file for `-Zllvm-time-trace`)
 - #91870 (Revert setting a default for the MACOSX_DEPLOYMENT_TARGET env var for linking)
 - #91881 (Stabilize `iter::zip`)
 - #91882 (Remove `in_band_lifetimes` from `rustc_typeck`)
 - #91940 (Update cargo)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
2021-12-15 03:28:55 +00:00
..
src Auto merge of #91945 - matthiaskrgr:rollup-jszf9zp, r=matthiaskrgr 2021-12-15 03:28:55 +00:00
Cargo.toml Migrate to 2021 2021-09-20 22:21:42 -04:00
README.md docs(rustc_ast): update crate descriptions 2021-11-02 21:11:17 -05:00

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: