Method compare

ThirdParty/jsoncpp/vtkjsoncpp/jsoncpp.cpp:2920–2926

}

int Value::compare(const Value& other) const {
  if (*this < other)
    return -1;
  if (*this > other)
    return 1;
  return 0;
}

bool Value::operator<(const Value& other) const {
  int typeDelta = type() - other.type();