QVariant operator==() documentation doesn't answer all questions

The documentation of the QVariant::operator==() is not answering all questions.

The important question is how user defined types are handeled:

• is the result undefined?
• are only adresses compared?
• is the data compared bytewise?
• has using the Q_DECLARE_METATYPE macro an effect?

After experimenting with it, I would assume user types are compared bytewise. But that's just an assumption.

It would be optimal if programmers could know the behavior by reading the documentation.