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ruff/crates/ruff_python_parser
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Brent Westbrook 2382fe1f25
[syntax-errors] Tuple unpacking in for statement iterator clause before Python 3.9 (#16558) 
Summary
--

This PR reuses a slightly modified version of the
`check_tuple_unpacking` method added for detecting unpacking in `return`
and `yield` statements to detect the same issue in the iterator clause
of `for` loops.

I ran into the same issue with a bare `for x in *rest: ...` example
(invalid even on Python 3.13) and added it as a comment on
https://github.com/astral-sh/ruff/issues/16520.

I considered just making this an additional `StarTupleKind` variant as
well, but this change was in a different version of Python, so I kept it
separate.

Test Plan
--

New inline tests.
2025-03-13 15:55:17 -04:00
..
resources [syntax-errors] Tuple unpacking in for statement iterator clause before Python 3.9 (#16558) 2025-03-13 15:55:17 -04:00
src [syntax-errors] Tuple unpacking in for statement iterator clause before Python 3.9 (#16558) 2025-03-13 15:55:17 -04:00
tests [syntax-errors] Tuple unpacking in for statement iterator clause before Python 3.9 (#16558) 2025-03-13 15:55:17 -04:00
Cargo.toml Allow passing ParseOptions to inline tests (#16357) 2025-02-27 10:23:15 -05:00
CONTRIBUTING.md py-fuzzer: recommend using uvx rather than uv run to run the fuzzer (#14645) 2024-11-27 22:19:52 +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.