# File lib/core_ex/object/instance_eval_with_args.rb, line 15
      def instance_eval_with_args ( *args, &block )
        raise ArgumentError, "no block given" if block.nil?
        method_name = "instance_eval_temporary_method#{object_id}.#{@@seed}""instance_eval_temporary_method#{object_id}.#{@@seed}"
        @@seed += 1
        define_singleton_method(method_name, &block)
        begin
          result = __send__(method_name, *args)
        ensure
          undef_singleton_method(method_name)
        end
        result
      end