scan

# File actionpack/lib/action_dispatch/journey/scanner.rb, line 44
        def scan
          case
            # /
          when @ss.skip(/\//)
            [:SLASH, "/"]
          when @ss.skip(/\(/)
            [:LPAREN, "("]
          when @ss.skip(/\)/)
            [:RPAREN, ")"]
          when @ss.skip(/\|/)
            [:OR, "|"]
          when @ss.skip(/\./)
            [:DOT, "."]
          when text = dedup_scan(/:\w+/)
            [:SYMBOL, text]
          when text = dedup_scan(/\*\w+/)
            [:STAR, text]
          when text = @ss.scan(/(?:[\w%\-~!$&'*+,;=@]|\\[:()])+/)
            text.tr! "\\", ""
            [:LITERAL, -text]
            # any char
          when text = dedup_scan(/./)
            [:LITERAL, text]
          end
        end