Class: RuboCop::Cop::Style::InPatternThen

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector, TargetRubyVersion
Defined in:
lib/rubocop/cop/style/in_pattern_then.rb

Overview

Checks for ‘in;` uses in `case` expressions.

Examples:

# 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

Constant Summary collapse

MSG = 
'Do not use `in %<pattern>s;`. Use `in %<pattern>s then` instead.'

Instance Method Summary collapse

Methods included from AutoCorrector

support_autocorrect?

Methods included from TargetRubyVersion

maximum_target_ruby_version, minimum_target_ruby_version, required_maximum_ruby_version, required_minimum_ruby_version, support_target_ruby_version?

Instance Method Details

#on_in_pattern(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/in_pattern_then.rb', line 29

def on_in_pattern(node)
  return if node.multiline? || node.then? || !node.body

  pattern = node.pattern
  pattern_source = if pattern.match_alt_type?
                     alternative_pattern_source(pattern)
                   else
                     pattern.source
                   end

  add_offense(node.loc.begin, message: format(MSG, pattern: pattern_source)) do |corrector|
    corrector.replace(node.loc.begin, ' then')
  end
end