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| author | Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> | 2020-06-20 17:59:32 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-06-20 17:59:32 (GMT) |
| commit | 98621817504add1e985e2526614921bbe0d24fb6 (patch) | |
| tree | 2887c29f6208b9d714e0dd736907fe2c29bfd3ae /Lib | |
| parent | c9f83c173b0cc62d6fcdc363e9ab05f6664ff8f3 (diff) | |
| download | cpython-98621817504add1e985e2526614921bbe0d24fb6.zip cpython-98621817504add1e985e2526614921bbe0d24fb6.tar.gz cpython-98621817504add1e985e2526614921bbe0d24fb6.tar.bz2 | |
bpo-41044: Generate valid PEG python parsers for opt+seq rules (GH-20995)
Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
(cherry picked from commit 55460ee6dc9a4f16bd68d6b6be3a8398c7d4a596)
Co-authored-by: Batuhan Taskaya <isidentical@gmail.com>
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_peg_generator/test_pegen.py | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/test/test_peg_generator/test_pegen.py b/Lib/test/test_peg_generator/test_pegen.py index 30e1b67..5b4e964 100644 --- a/Lib/test/test_peg_generator/test_pegen.py +++ b/Lib/test/test_peg_generator/test_pegen.py @@ -493,6 +493,14 @@ class TestPegen(unittest.TestCase): # Would assert False without a special case in compute_left_recursives(). make_parser(grammar) + def test_opt_sequence(self) -> None: + grammar = """ + start: [NAME*] + """ + # This case was failing because of a double trailing comma at the end + # of a line in the generated source. See bpo-41044 + make_parser(grammar) + def test_left_recursion_too_complex(self) -> None: grammar = """ start: foo |