History

Brent Westbrook 2250fa6f98 Fix syntax error false positives for `await` outside functions (#21763 ) ## Summary Fixes #21750 and a related bug in `PLE1142`. We were not properly considering generators to be valid `await` contexts, which caused the `F704` issue. One of the tests I added for this also uncovered an issue in `PLE1142` for comprehensions nested within async generators because we were only checking the current scope rather than traversing the nested context. ## Test Plan Both of these rules are implemented as semantic syntax errors, so I added tests (and fixes) in both Ruff and ty.		2025-12-02 21:02:02 +00:00
..
resources	[`parser`] Fix panic when parsing IPython escape command expressions (#21480 )	2025-11-24 05:40:27 +00:00
src	Fix syntax error false positives for `await` outside functions (#21763 )	2025-12-02 21:02:02 +00:00
tests	Fix syntax error false positives for `await` outside functions (#21763 )	2025-12-02 21:02:02 +00:00
CONTRIBUTING.md	Update usage instructions and lockfile for py-fuzzer script (#20940 )	2025-10-17 15:57:17 +01:00
Cargo.toml	[ty] Add environment variable to dump Salsa memory usage stats (#18928 )	2025-06-26 21:27:51 +00:00
README.md	Add basic docs for the parser crate (#11199 )	2024-04-29 17:08:07 +00:00

README.md

Ruff Python Parser

Ruff's Python parser is a hand-written recursive descent parser which can parse Python source code into an Abstract Syntax Tree (AST). It also utilizes the Pratt parsing technique to parse expressions with different precedence.

Try out the parser in the playground.

Python version support

The parser supports the latest Python syntax, which is currently Python 3.12. It does not throw syntax errors if it encounters a syntax feature that is not supported by the target-version. This will be fixed in a future release (see https://github.com/astral-sh/ruff/issues/6591).

Contributing

Refer to the contributing guidelines to get started and GitHub issues with the parser label for issues that need help.