# File lib/core/facets/enumerable/recursively.rb, line 26
    def method_missing(op, &yld)
      rec = @block || lambda{ |v| v }
      yld = yld    || lambda{ |v| v }  # ? to_enum
      @enum.__send__(op) do |v|
        case v
        when String # b/c of 1.8
          yld.call(v)
        when *@types
          res = v.recursively(*@types, &@block).__send__(op,&yld)
          rec.call(res)
        else
          yld.call(v)
        end
      end
    end