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## Summary This PR is the first in a series derived from https://github.com/astral-sh/ruff/pull/16308, each of which add support for detecting one version-related syntax error from https://github.com/astral-sh/ruff/issues/6591. This one should be the largest because it also includes the addition of the `Parser::add_unsupported_syntax_error` method Otherwise I think the general structure will be the same for each syntax error: * Detecting the error in the parser * Inline parser tests for the new error * New ruff CLI tests for the new error ## Test Plan As noted above, there are new inline parser tests, as well as new ruff CLI tests. Once https://github.com/astral-sh/ruff/pull/16379 is resolved, there should also be new mdtests for red-knot, but this PR does not currently include those. |
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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.