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Fix a false positive for Style/RedundantParentheses #12505

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@koic koic commented Dec 4, 2023

Follow up #12381 (comment).

This PR fixes a false positive for Style/RedundantParentheses when using parenthesized lambda or proc with do...end block.

do...end and {...} have different precedence, so with do...end, parentheses are needed to correct the order of association. However, with ->, there is no need to worry about precedence, so the parentheses can be removed.


Before submitting the PR make sure the following are checked:

  • The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
  • Wrote good commit messages.
  • Commit message starts with [Fix #issue-number] (if the related issue exists).
  • Feature branch is up-to-date with master (if not - rebase it).
  • Squashed related commits together.
  • Added tests.
  • Ran bundle exec rake default. It executes all tests and runs RuboCop on its own code.
  • Added an entry (file) to the changelog folder named {change_type}_{change_description}.md if the new code introduces user-observable changes. See changelog entry format for details.

Follow up rubocop#12381 (comment).

This PR fixes a false positive for `Style/RedundantParentheses`
when using parenthesized `lambda` or `proc` with `do`...`end` block.

`do`...`end` and `{`...`}` have different precedence, so with `do`...`end`,
parentheses are needed to correct the order of association. However, with `->`,
there is no need to worry about precedence, so the parentheses can be removed.
@koic koic merged commit 9524694 into rubocop:master Dec 4, 2023
28 checks passed
@koic koic deleted the fix_a_false_positive_for_style_redundant_parentheses branch December 4, 2023 16:37
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