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Summary -- This is closely related to (and stacked on) https://github.com/astral-sh/ruff/pull/16544 and detects star annotations in function definitions. I initially called the variant `StarExpressionInAnnotation` to mirror `StarExpressionInIndex`, but I realized it's not really a "star expression" in this position and renamed it. `StarAnnotation` seems in line with the PEP. Test Plan -- Two new inline tests. It looked like there was pretty good existing coverage of this syntax, so I just added simple examples to test the version cutoff. |
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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.