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Summary -- This PR fixes #17796 by taking the approach mentioned in https://github.com/astral-sh/ruff/issues/17796#issuecomment-2847943862 of simply recursing into the `MatchAs` patterns when checking if we need parentheses. This allows us to reuse the parentheses in the inner pattern before also breaking the `MatchAs` pattern itself: ```diff match class_pattern: case Class(xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx) as capture: pass - case ( - Class(xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx) as capture - ): + case Class( + xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx + ) as capture: pass - case ( - Class( - xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx - ) as capture - ): + case Class( + xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx + ) as capture: pass case ( Class( @@ -685,13 +683,11 @@ match sequence_pattern_brackets: case [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx] as capture: pass - case ( - [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx] as capture - ): + case [ + xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx + ] as capture: pass - case ( - [ - xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx - ] as capture - ): + case [ + xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx + ] as capture: pass ``` I haven't really resolved the question of whether or not it's okay always to recurse, but I'm hoping the ecosystem check on this PR might shed some light on that. Test Plan -- New tests based on the issue and then reviewing the ecosystem check here |
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