竜 TatSu is a tool that takes grammars in a variation of EBNF as input, and outputs memoizing (Packrat) PEG parsers in Python. 竜 TatSu inspired the PEG parser in Python 3.9.
New in 竜 TatSu 5.6.0 * Several important refactorings in ``contexts.ParseContext`` * Make ``ignorecase`` settings apply to defined ``@@keywords`` * Move checking of keywords used as names into ``ParseContext`` * Output of generated parsers again matches that of model parsers * Improve *"expecting one of:"* messages so elements are in declaration order * Stop code generation if there are closures over possibly empty expressions * Preserve name declaration order in returned ``AST`` * Update the bootstrap parser (``tatsu/bootstrap.py``) to the generated parser * Now generated parser's ``main()`` only outputs the JSON for the parse ``AST`` * Minor version bumped in case the many fixes break backwards-compatibility * Minor documentation issues fixed * All tests run with Python 3.8, 3.9, 3.10 https://pypi.org/project/tatsu/ https://tatsu.readthedocs.io/en/stable/ https://github.com/neogeny/TatSu Happy quarantine days, my dear nerds! -- Juancarlo
_______________________________________________ PEG mailing list PEG@lists.csail.mit.edu https://lists.csail.mit.edu/mailman/listinfo/peg
