ruby alias methods

ruby alias methods

class A
  class << self
    def set_opt
      self.instance_eval do 
        define_method(:foo) do 
          puts "wrapped!"
          super()
          puts "end wrap"
        end
      end
      # self.class_eval do
      #   define_method(:perform_async) do 
      #     puts "perform_async wrapped!"
      #     super()
      #     puts "perform_async end wrap"
      #   end
      # # end
      def perform_async
        puts "orig async"
      end

      alias :ruby_is_stupid :perform_async

      def perform_async
        puts "new async"
        ruby_is_stupid
      end
    end

  end

  def foo
    puts 123
  end

end

class B < A
  set_opt
end

A.perform_async