class RuboCop::Cop::Style::WhenThen

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

@example

# bad
case foo
when 1; 'baz'
when 2; 'bar'
end

# good
case foo
when 1 then 'baz'
when 2 then 'bar'
end

Constants

MSG

Public Instance Methods

on_when(node) click to toggle source
# File lib/rubocop/cop/style/when_then.rb, line 25
def on_when(node)
  return if node.multiline? || node.then? || !node.body

  message = format(MSG, expression: node.conditions.map(&:source).join(', '))

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