module ActionController::Routing
  class DynamicSegment
    def interpolation_chunk
      "\#{CGI.escape(#{local_name}.to_s)}"
    end

    def match_extraction(next_capture)
      default_value = default ? default.inspect : nil
      %[
        value = if (m = match[#{next_capture}])
          CGI.unescape(m)
        else
          #{default_value}
        end
        params[:#{key}] = value if value
      ]
    end
  end
end