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Add new Style/InPatternThen cop #9833

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merged 1 commit into from May 30, 2021

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@koic koic commented May 28, 2021

This PR adds new Style/InPatternThen cop. It checks for in; uses in case expressions.

# bad
case expression
in pattern_a; foo
in pattern_b; bar
end

# good
case expression
in pattern_a then foo
in pattern_b then bar
end

This cop is similar to Style/WhenThen, but with different supported syntax and Ruby version (requires 2.7 or higher).

And this PR use rubocop/rubocop-ast#186 feature, so it requires RuboCop AST 1.7.0 or higher.


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.

@koic koic force-pushed the add_new_style_in_pattern_then_cop branch from f9358cf to ffa71e4 Compare May 28, 2021 17:26
This PR adds new `Style/InPatternThen` cop.
It checks for `in;` uses in `case` expressions.

```ruby
# bad
case expression
in pattern_a; foo
in pattern_b; bar
end

# good
case expression
in pattern_a then foo
in pattern_b then bar
end
```

This cop is similar to `Style/WhenThen`, but with different supported
syntax and Ruby version (requires 2.7 or higher).

And this PR use rubocop/rubocop-ast#186 feature,
so it requires RuboCop AST 1.7.0 or higher.
@koic koic force-pushed the add_new_style_in_pattern_then_cop branch from ffa71e4 to 2b903ff Compare May 29, 2021 19:40
@bbatsov bbatsov merged commit c95a145 into rubocop:master May 30, 2021
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bbatsov commented May 30, 2021

Looks good!

@koic koic deleted the add_new_style_in_pattern_then_cop branch May 30, 2021 07:32
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2 participants