class Symbol

def self.from_msgpack_ext(data)
  # from_msgpack_ext is supposed to parse a binary string.
  # The canonical way to do it for symbols would be:
  #  data.unpack1('A*').to_sym
  # However in this instance we can take a shortcut
  # We assume the string encoding is UTF-8, and let Ruby create either
  # an ASCII symbol or UTF-8 symbol.
  data.force_encoding(Encoding::UTF_8).to_sym
rescue EncodingError
  # If somehow the string wasn't valid UTF-8 not valid ASCII, we fallback
  # to what has been the historical behavior of creating a binary symbol
  data.force_encoding(Encoding::BINARY).to_sym
end

def to_msgpack_with_packer(packer)
  packer.write_symbol self
  packer
end