This package implements LR parsers and tests them against grammars.
The automaton and runtime is frontend-agnostic.
- LR(0) (nearly useless)
- SLR(1) (not as flexible as LALR)
- LALR(1) (best choice)
- LR(1) (may be expensive and usually not needed)
- automatic selection of the above
- bison xml (requires external tool, can do precedence parsing)
- Python 3.3 or later. Porting to 3.2 is possible but not important to me.
- pytest (to run tests).
- pytest-cov (to include coverage information with tests).
Undocumented, see tests for examples.
Tests can be run against a single python version using
make PYTHON=python3.4. The default is just python, which is wrong
on all sane systems since it refers to python2 unless you are in a venv.
To easily test in venvs for each python version, run tox. If you change
requirements.txt or the remote packages it points to, run tox -r.