# File scanf.rb, line 684
  def block_scanf(fstr,&b)
    fs = Scanf::FormatString.new(fstr)
    str = self.dup
    final = []
    begin
      current = str.scanf(fs)
      final.push(yield(current)) unless current.empty?
      str = fs.string_left
    end until current.empty? || str.empty?
    return final
  end

# File scanf.rb, line 670
  def scanf(fstr,&b)
    if b
      block_scanf(fstr,&b)
    else
      fs = 
        if fstr.is_a? Scanf::FormatString
          fstr 
        else 
          Scanf::FormatString.new(fstr)
        end
      fs.match(self)
    end
  end