"Maarten Kronenburg" <M.Kronenburg@inter.nl.net> writes:
Stefan, Templates provide compile-time polymorphism, while derivation provides run-time polymorphism. For using mixed expressions with different types, run-time polymorphism is required.
No, that's why we have templates. In fact, runtime polymorphism breaks down horribly with mixed type expressions. I suggest you google "binary method problem" to see why. Maarten, I may be speaking too soon because admittedly I have not followed every message in this thread, but at this point it looks to me like several of your proposed design choices are so far from what this group would be likely to accept that there would be little point in bringing such a library for review. It also seems as though you'd benefit more by trying to learn from your fellow Boosters than by arguing with them. I suggest you try to adopt a different approach. -- Dave Abrahams Boost Consulting www.boost-consulting.com