class RuboCop::Cop::Style::EmptyCaseCondition

def on_case(case_node)
  return if case_node.condition
  branch_bodies = [
    *case_node.when_branches.map(&:body),
    case_node.else_branch
  ].compact
  return if branch_bodies.any? do |body|
    body.return_type? ||
    body.each_descendant.any?(&:return_type?)
  end
  add_offense(case_node.loc.keyword) do |corrector|
    autocorrect(corrector, case_node)
  end
end