# File lib/racc/grammarfileparser.rb, line 297
    def initialize(str, filename = '-')
      @lines  = str.split(/\n|\r\n|\r/)
      @filename = filename
      @lineno = -1
      @line_head   = true
      @in_rule_blk = false
      @in_conv_blk = false
      @in_block = nil
      @epilogue = ''
      @debug = false
      next_line
    end