module Signal
  def self.call
    Call
  end

  module Call
    def self.included(target)
      target.include(Signal)
      target.extend(ClassMethods)
    end

    module ClassMethods
      def call(*args, &block)
        new(*args).tap do |instance|
          yield(instance)
          instance.call
        end
      end
    end
  end
end