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Use early returns in get_grammars() to save an indentation level

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Łukasz Langa 2019-10-28 17:09:25 +01:00
parent 8adf5f0830
commit 95fd5cb648
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GPG Key ID: B26995E310250568
1 changed files with 17 additions and 16 deletions
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black.py
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@ -787,7 +787,8 @@ def get_grammars(target_versions: Set[TargetVersion]) -> List[Grammar]:
# Python 2.7
pygram.python_grammar,
]
elif all(version.is_python2() for version in target_versions):
if all(version.is_python2() for version in target_versions):
# Python 2-only code, so try Python 2 grammars.
return [
# Python 2.7 with future print_function import
@ -795,21 +796,21 @@ def get_grammars(target_versions: Set[TargetVersion]) -> List[Grammar]:
# Python 2.7
pygram.python_grammar,
]
else:
# Python 3-compatible code, so only try Python 3 grammar.
grammars = []
# If we have to parse both, try to parse async as a keyword first
if not supports_feature(target_versions, Feature.ASYNC_IDENTIFIERS):
# Python 3.7+
grammars.append(
pygram.python_grammar_no_print_statement_no_exec_statement_async_keywords # noqa: B950
)
if not supports_feature(target_versions, Feature.ASYNC_KEYWORDS):
# Python 3.0-3.6
grammars.append(pygram.python_grammar_no_print_statement_no_exec_statement)
# At least one of the above branches must have been taken, because every Python
# version has exactly one of the two 'ASYNC_*' flags
return grammars
# Python 3-compatible code, so only try Python 3 grammar.
grammars = []
# If we have to parse both, try to parse async as a keyword first
if not supports_feature(target_versions, Feature.ASYNC_IDENTIFIERS):
# Python 3.7+
grammars.append(
pygram.python_grammar_no_print_statement_no_exec_statement_async_keywords
)
if not supports_feature(target_versions, Feature.ASYNC_KEYWORDS):
# Python 3.0-3.6
grammars.append(pygram.python_grammar_no_print_statement_no_exec_statement)
# At least one of the above branches must have been taken, because every Python
# version has exactly one of the two 'ASYNC_*' flags
return grammars
def lib2to3_parse(src_txt: str, target_versions: Iterable[TargetVersion] = ()) -> Node: