diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/test_unit.py | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tests/test_unit.py b/tests/test_unit.py index ad16154..0ebb8cc 100644 --- a/tests/test_unit.py +++ b/tests/test_unit.py @@ -8169,6 +8169,21 @@ class TestLR1_Recursion(ppt.TestParseResultsAsserts, TestCase): self.assertEqual(expr.parseString("1*2^3")[0], 1*2**3) self.assertEqual(expr.parseString("4^3^2^1")[0], 4**3**2**1) + def test_terminate_empty(self): + """Recursion with ``Empty`` terminates""" + empty = pp.Forward('e') + empty <<= empty + pp.Empty() | pp.Empty() + self.assertParseResultsEquals(empty.parseString(""), expected_list=[]) + + def test_non_peg(self): + """Recursion works for non-PEG operators""" + expr = pp.Forward('expr') + expr <<= expr + "a" ^ e + "ab" ^ e + "abc" + self.assertParseResultsEquals( + e.parseString("abcabaabc"), + expected_list=["abc", "ab", "a", "abc"] + ) + # force clear of packrat parsing flags before saving contexts pp.ParserElement._packratEnabled = False |