_parse_iso2

# File lib/date/format.rb, line 802
  def self._parse_iso2(str, e) # :nodoc:
    if str.sub!(/\b(\d{2}|\d{4})?-?w(\d{2})(?:-?(\d))?\b/, ' ')
      e.cwyear = $1.to_i if $1
      e.cweek = $2.to_i
      e.cwday = $3.to_i if $3
      true
    elsif str.sub!(/-w-(\d)\b/, ' ')
      e.cwday = $1.to_i
      true
    elsif str.sub!(/--(\d{2})?-(\d{2})\b/, ' ')
      e.mon = $1.to_i if $1
      e.mday = $2.to_i
      true
    elsif str.sub!(/--(\d{2})(\d{2})?\b/, ' ')
      e.mon = $1.to_i
      e.mday = $2.to_i if $2
      true
    elsif /[,.](\d{2}|\d{4})-\d{3}\b/ !~ str &&
        str.sub!(/\b(\d{2}|\d{4})-(\d{3})\b/, ' ')
      e.year = $1.to_i
      e.yday = $2.to_i
      true
    elsif /\d-\d{3}\b/ !~ str &&
        str.sub!(/\b-(\d{3})\b/, ' ')
      e.yday = $1.to_i
      true
    end
  end