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## Summary This PR re-implements [return-in-generator (B901)](https://docs.astral.sh/ruff/rules/return-in-generator/#return-in-generator-b901) for async generators as a semantic syntax error. This is not a syntax error for sync generators, so we'll need to preserve both the lint rule and the syntax error in this case. It also updates B901 and the new implementation to catch cases where the generator's `yield` or `yield from` expression is part of another statement, as in: ```py def foo(): return (yield) ``` These were previously not caught because we only looked for `Stmt::Expr(Expr::Yield)` in `visit_stmt` instead of visiting `yield` expressions directly. I think this modification is within the spirit of the rule and safe to try out since the rule is in preview. ## Test Plan <!-- How was it tested? --> I have written tests as directed in #17412 --------- Signed-off-by: 11happy <soni5happy@gmail.com> Signed-off-by: 11happy <bhuminjaysoni@gmail.com> Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com> Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com> |
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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.