2022-10-09 16:27:10 +03:00
|
|
|
"""Fixer that adds parentheses where they are required
|
2022-09-17 15:26:13 +03:00
|
|
|
|
|
|
|
|
This converts ``[x for x in 1, 2]`` to ``[x for x in (1, 2)]``."""
|
|
|
|
|
|
|
|
|
|
# By Taek Joo Kim and Benjamin Peterson
|
|
|
|
|
|
|
|
|
|
# Local imports
|
|
|
|
|
from .. import fixer_base
|
|
|
|
|
from ..fixer_util import LParen, RParen
|
|
|
|
|
|
|
|
|
|
# XXX This doesn't support nested for loops like [x for x in 1, 2 for x in 1, 2]
|
|
|
|
|
class FixParen(fixer_base.BaseFix):
|
|
|
|
|
BM_compatible = True
|
|
|
|
|
|
|
|
|
|
PATTERN = """
|
|
|
|
|
atom< ('[' | '(')
|
|
|
|
|
(listmaker< any
|
|
|
|
|
comp_for<
|
|
|
|
|
'for' NAME 'in'
|
|
|
|
|
target=testlist_safe< any (',' any)+ [',']
|
|
|
|
|
>
|
|
|
|
|
[any]
|
|
|
|
|
>
|
|
|
|
|
>
|
|
|
|
|
|
|
|
|
|
|
testlist_gexp< any
|
|
|
|
|
comp_for<
|
|
|
|
|
'for' NAME 'in'
|
|
|
|
|
target=testlist_safe< any (',' any)+ [',']
|
|
|
|
|
>
|
|
|
|
|
[any]
|
|
|
|
|
>
|
|
|
|
|
>)
|
|
|
|
|
(']' | ')') >
|
|
|
|
|
"""
|
|
|
|
|
|
|
|
|
|
def transform(self, node, results):
|
|
|
|
|
target = results["target"]
|
|
|
|
|
|
|
|
|
|
lparen = LParen()
|
|
|
|
|
lparen.prefix = target.prefix
|
|
|
|
|
target.prefix = "" # Make it hug the parentheses
|
|
|
|
|
target.insert_child(0, lparen)
|
|
|
|
|
target.append_child(RParen())
|
