test_parser.py 文件源码

def test_recurse_expansion(self):
        """Verify that stack depth doesn't get exceeded on recursive rules marked for expansion."""
        g = Grammar(r"""@start: a | start a ; a : A ; A : 'a' ;""")

        # Force PLY to write to the debug log, but prevent writing it to the terminal (uses repr() on the half-built
        # STree data structures, which uses recursion).
        g._grammar.debug = yacc.NullLogger()

        g.parse("a" * (sys.getrecursionlimit() // 4))