ruff/crates/ruff_python_parser
Alex Waygood 38bfda94ce
[syntax-errors] Improve error message and range for pre-PEP-614 decorator syntax errors (#16581)
## Summary

A small followup to https://github.com/astral-sh/ruff/pull/16386. We now
tell the user exactly what it was about their decorator that constituted
invalid syntax on Python <3.9, and the range now highlights the specific
sub-expression that is invalid rather than highlighting the whole
decorator

## Test Plan

Inline snapshots are updated, and new ones are added.
2025-03-17 11:17:27 +00:00
..
resources [syntax-errors] Improve error message and range for pre-PEP-614 decorator syntax errors (#16581) 2025-03-17 11:17:27 +00:00
src [syntax-errors] Improve error message and range for pre-PEP-614 decorator syntax errors (#16581) 2025-03-17 11:17:27 +00:00
tests [syntax-errors] Improve error message and range for pre-PEP-614 decorator syntax errors (#16581) 2025-03-17 11:17:27 +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

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.