Method swap

external/jsoncpp/jsoncpp.cpp:1684–1687

}

void Value::CZString::swap(CZString &other) {
  std::swap(cstr_, other.cstr_);
  std::swap(index_, other.index_);
}

Value::CZString &Value::CZString::operator=(const CZString &other) {
  CZString temp(other);