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ruff/crates/ruff_python_parser
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Brent Westbrook 81bcdcebd3
[syntax-errors] Type parameter lists before Python 3.12 (#16479) 
Summary
--

Another simple one, just detect type parameter lists in functions
and classes. Like pyright, we don't emit a second diagnostic for
`type` alias statements, which were also introduced in 3.12.

Test Plan
--
Inline tests.
2025-03-05 13:19:09 +00:00
..
resources [syntax-errors] Type parameter lists before Python 3.12 (#16479) 2025-03-05 13:19:09 +00:00
src [syntax-errors] Type parameter lists before Python 3.12 (#16479) 2025-03-05 13:19:09 +00:00
tests [syntax-errors] Type parameter lists before Python 3.12 (#16479) 2025-03-05 13:19:09 +00:00
Cargo.toml Allow passing ParseOptions to inline tests (#16357) 2025-02-27 10:23:15 -05:00
CONTRIBUTING.md py-fuzzer: recommend using uvx rather than uv run to run the fuzzer (#14645) 2024-11-27 22:19:52 +00:00
README.md Add basic docs for the parser crate (#11199) 2024-04-29 17:08:07 +00:00

README.md

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.