| 1 | n/a | """Fixer that addes parentheses where they are required |
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| 2 | n/a | |
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| 3 | n/a | This converts ``[x for x in 1, 2]`` to ``[x for x in (1, 2)]``.""" |
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| 4 | n/a | |
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| 5 | n/a | # By Taek Joo Kim and Benjamin Peterson |
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| 6 | n/a | |
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| 7 | n/a | # Local imports |
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| 8 | n/a | from .. import fixer_base |
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| 9 | n/a | from ..fixer_util import LParen, RParen |
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| 10 | n/a | |
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| 11 | n/a | # XXX This doesn't support nested for loops like [x for x in 1, 2 for x in 1, 2] |
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| 12 | n/a | class FixParen(fixer_base.BaseFix): |
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| 13 | n/a | BM_compatible = True |
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| 14 | n/a | |
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| 15 | n/a | PATTERN = """ |
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| 16 | n/a | atom< ('[' | '(') |
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| 17 | n/a | (listmaker< any |
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| 18 | n/a | comp_for< |
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| 19 | n/a | 'for' NAME 'in' |
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| 20 | n/a | target=testlist_safe< any (',' any)+ [','] |
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| 21 | n/a | > |
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| 22 | n/a | [any] |
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| 23 | n/a | > |
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| 24 | n/a | > |
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| 25 | n/a | | |
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| 26 | n/a | testlist_gexp< any |
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| 27 | n/a | comp_for< |
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| 28 | n/a | 'for' NAME 'in' |
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| 29 | n/a | target=testlist_safe< any (',' any)+ [','] |
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| 30 | n/a | > |
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| 31 | n/a | [any] |
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| 32 | n/a | > |
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| 33 | n/a | >) |
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| 34 | n/a | (']' | ')') > |
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| 35 | n/a | """ |
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| 36 | n/a | |
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| 37 | n/a | def transform(self, node, results): |
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| 38 | n/a | target = results["target"] |
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| 39 | n/a | |
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| 40 | n/a | lparen = LParen() |
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| 41 | n/a | lparen.prefix = target.prefix |
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| 42 | n/a | target.prefix = "" # Make it hug the parentheses |
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| 43 | n/a | target.insert_child(0, lparen) |
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| 44 | n/a | target.append_child(RParen()) |
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