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ruff/crates/ruff_python_parser
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Abhijeet Prasad Bodas f5096f2050
[parser] Flag single unparenthesized generator expr with trailing comma in arguments. (#17893) 
Fixes #17867

## Summary

The CPython parser does not allow generator expressions which are the
sole arguments in an argument list to have a trailing comma.
With this change, we start flagging such instances.

## Test Plan

Added new inline tests.
2025-05-07 14:11:35 -04:00
..
resources [parser] Flag single unparenthesized generator expr with trailing comma in arguments. (#17893) 2025-05-07 14:11:35 -04:00
src [parser] Flag single unparenthesized generator expr with trailing comma in arguments. (#17893) 2025-05-07 14:11:35 -04:00
tests [parser] Flag single unparenthesized generator expr with trailing comma in arguments. (#17893) 2025-05-07 14:11:35 -04:00
Cargo.toml Allow passing ParseOptions to inline tests (#16357) 2025-02-27 10:23:15 -05:00
CONTRIBUTING.md Update pre-commit dependencies (#17073) 2025-03-31 07:42:15 +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.