# File lib/webrobots/robotstxt.rb, line 742
      def compile
        case @value
        when /\A((0|[1-9][0-9]*)\.[0-9]+)/
          @delay = @value.to_f
        when /\A(0|[1-9][0-9]*)/
          @delay = @value.to_i
        else
          @delay = nil
        end
        self
      end