class I18n::Locale::Tag::Rfc4646

def parser 

def parser
  @@parser ||= Rfc4646::Parser
end

def parser=(parser) 

def parser=(parser)
  @@parser = parser
end

def tag(tag)

Returns false if the given tag is not valid according to RFC 4646.
Parses the given tag and returns a Tag instance if it is valid. 
def tag(tag)
  matches = parser.match(tag)
  new(*matches) if matches
end

def to_a 

def to_a
  members.collect { |attr| self.send(attr) }
end

def to_s 

def to_s
  @tag ||= to_a.compact.join("-")
end

def to_sym 

def to_sym
  to_s.to_sym
end