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Don't make redundant copies of the DFA (#2763)

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Batuhan Taskaya 2022-01-14 05:01:44 +03:00 committed by GitHub
parent 799f76f537
commit 7a29568115
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src/blib2to3/pgen2/parse.py
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@ -54,7 +54,7 @@ def stack_copy(
stack: List[Tuple[DFAS, int, RawNode]] stack: List[Tuple[DFAS, int, RawNode]]
) -> List[Tuple[DFAS, int, RawNode]]: ) -> List[Tuple[DFAS, int, RawNode]]:
"""Nodeless stack copy.""" """Nodeless stack copy."""
return [(copy.deepcopy(dfa), label, DUMMY_NODE) for dfa, label, _ in stack] return [(dfa, label, DUMMY_NODE) for dfa, label, _ in stack]
class Recorder: class Recorder: