# File lib/sass/script/lexer.rb, line 151
      def initialize(str, line, offset, options)
        @scanner = str.is_a?(StringScanner) ? str : Sass::Util::MultibyteStringScanner.new(str)
        @line = line
        @offset = offset
        @options = options
        @interpolation_stack = []
        @prev = nil
        @tok = nil
        @next_tok = nil
      end