# File lib/liquid/lexer.rb, line 25
    def tokenize
      @output = []

      while !@ss.eos?
        @ss.skip(/\s*/)
        tok = case
        when t = @ss.scan(COMPARISON_OPERATOR) then [:comparison, t]
        when t = @ss.scan(SINGLE_STRING_LITERAL) then [:string, t]
        when t = @ss.scan(DOUBLE_STRING_LITERAL) then [:string, t]
        when t = @ss.scan(NUMBER_LITERAL) then [:number, t]
        when t = @ss.scan(IDENTIFIER) then [:id, t]
        when t = @ss.scan(DOTDOT) then [:dotdot, t]
        else
          c = @ss.getch
          if s = SPECIALS[c]
            [s,c]
          else
            raise SyntaxError, "Unexpected character #{c}"
          end
        end
        @output << tok
      end

      @output << [:end_of_string]
    end