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d45593288f
Summary -- Fixes https://github.com/astral-sh/ruff/issues/16520 by flagging single, starred expressions in `return`, `yield`, and `for` statements. I thought `yield from` would also be included here, but that error is emitted by the CPython parser: ```pycon >>> ast.parse("def f(): yield from *x") Traceback (most recent call last): File "<python-input-214>", line 1, in <module> ast.parse("def f(): yield from *x") ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.13/ast.py", line 54, in parse return compile(source, filename, mode, flags, _feature_version=feature_version, optimize=optimize) File "<unknown>", line 1 def f(): yield from *x ^ SyntaxError: invalid syntax ``` And we also already catch it in our parser. Test Plan -- New inline tests and updates to existing tests. |
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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.