[New-bugs-announce] [issue41044] Pegen: double trailing comma on optional+sequence rules at python generator
Batuhan Taskaya
report at bugs.python.org
Fri Jun 19 18:57:19 EDT 2020
New submission from Batuhan Taskaya <isidentical at gmail.com>:
Python generator generates two trailing commas instead of one when both repeat0 (*) + optional ([]) qualifiers used. Example failing test (raises a SyntaxError, since the generated parser can't be parseable / executable)
def test_opt_sequence(self) -> None:
grammar = """
start: [NAME*]
"""
# This case was failing because of double trailing comma at the end
# of the generated parser. See bpo-
make_parser(grammar)
----------
messages: 371908
nosy: BTaskaya
priority: normal
severity: normal
status: open
title: Pegen: double trailing comma on optional+sequence rules at python generator
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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41044>
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