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gh-100061: Proper fix of the bug in the matching of possessive quantifiers (GH-102612)

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Restore the global Input Stream pointer after trying to match a sub-pattern.

Co-authored-by: Ma Lin <animalize@users.noreply.github.com>
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SKO 2023-08-16 16:43:45 +09:00 • committed by GitHub
parent a86df298df
commit abd9cc52d9
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4 changed files with 17 additions and 10 deletions
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14
Lib/test/test_re.py
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@ -2342,7 +2342,17 @@ class ReTests(unittest.TestCase):
self.assertTrue(re.fullmatch(r'(?s:(?>.*?\.).*)\Z', "a.txt")) # reproducer
self.assertTrue(re.fullmatch(r'(?s:(?=(?P<g0>.*?\.))(?P=g0).*)\Z', "a.txt"))
def test_bug_gh106052(self):
def test_bug_gh100061(self):
# gh-100061
self.assertEqual(re.match('(?>(?:.(?!D))+)', 'ABCDE').span(), (0, 2))
self.assertEqual(re.match('(?:.(?!D))++', 'ABCDE').span(), (0, 2))
self.assertEqual(re.match('(?>(?:.(?!D))*)', 'ABCDE').span(), (0, 2))
self.assertEqual(re.match('(?:.(?!D))*+', 'ABCDE').span(), (0, 2))
self.assertEqual(re.match('(?>(?:.(?!D))?)', 'CDE').span(), (0, 0))
self.assertEqual(re.match('(?:.(?!D))?+', 'CDE').span(), (0, 0))
self.assertEqual(re.match('(?>(?:.(?!D)){1,3})', 'ABCDE').span(), (0, 2))
self.assertEqual(re.match('(?:.(?!D)){1,3}+', 'ABCDE').span(), (0, 2))
# gh-106052
self.assertEqual(re.match("(?>(?:ab?c)+)", "aca").span(), (0, 2))
self.assertEqual(re.match("(?:ab?c)++", "aca").span(), (0, 2))
self.assertEqual(re.match("(?>(?:ab?c)*)", "aca").span(), (0, 2))
@ -2451,7 +2461,6 @@ ATOMIC_GROUP
17: SUCCESS
''')
@unittest.expectedFailure # gh-106052
def test_possesive_repeat_one(self):
self.assertEqual(get_debug_out(r'a?+'), '''\
POSSESSIVE_REPEAT 0 1
@ -2464,7 +2473,6 @@ POSSESSIVE_REPEAT 0 1
12: SUCCESS
''')
@unittest.expectedFailure # gh-106052
def test_possesive_repeat(self):
self.assertEqual(get_debug_out(r'(?:ab)?+'), '''\
POSSESSIVE_REPEAT 0 1