test_repeatable.py 文件源码

def test_repeatable_one_zero_rr_conflicts():
    """
    Check that translations of B+ and B* don't produce R/R conflict.
    """
    grammar = """
    S: A B+ C;
    S: A B* D;
    A:; B:; C:; D:;
    """
    g = Grammar.from_string(grammar, _no_check_recognizers=True)

    # Check if parser construction raises exception
    try:
        Parser(g)
    except RRConflicts:
        pytest.fail("R/R conflicts not expected here.")