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ruff/crates/ruff_python_parser
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Dhruv Manilawala 4a155e2b22
Re-order lexer methods (#11716) 
## Summary

This PR re-orders the lexer methods in the following order:

1. `next_token`
2. `lex_token`
3. `eat_indentation`
4. `handle_indentation`
5. `skip_whitespace`
6. `consume_ascii_character`
7. `try_single_char_prefix`
8. `try_double_char_prefix`
9. `lex_identifier`
10. `lex_fstring_start`
11. `lex_fstring_middle_or_end`
12. `lex_string`
13. `lex_number`
14. `lex_number_radix`
15. `lex_decimal_number`
16. `radix_run`
17. `lex_comment`
18. `lex_ipython_escape_command`
19. `consume_end`

Following was considered for the ordering:
* 1 is the main entry point which delegates to 2
* 3, 4, 5 are all related to whitespace which is done first
* 6 is the entrypoint for an ascii character which delegates to 9, 12,
13, 17, 18, 19
* Others are grouped around similar kind of methods
2024-06-03 12:58:35 +00:00
..
resources Maintain synchronicity between the lexer and the parser (#11457) 2024-06-03 18:23:50 +05:30
src Re-order lexer methods (#11716) 2024-06-03 12:58:35 +00:00
tests Maintain synchronicity between the lexer and the parser (#11457) 2024-06-03 18:23:50 +05:30
Cargo.toml Maintain synchronicity between the lexer and the parser (#11457) 2024-06-03 18:23:50 +05:30
CONTRIBUTING.md Add basic docs for the parser crate (#11199) 2024-04-29 17:08:07 +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.