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Summary -- Detects duplicate type parameter names in function definitions, class definitions, and type alias statements. I also boxed the `type_params` field on `StmtTypeAlias` to make it easier to `match` with functions and classes. (That's the reason for the red-knot code owner review requests, sorry!) Test Plan -- New `ruff_python_syntax_errors` unit tests. Fixes #11119. |
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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.