a while back, a guy i worked with came up with a really cool bit of code; it would tell you if one class inherited from another, and this test was done at compile time.
it was used like this:
Inheritance<Base,Derived>::exists
i could really use it now, but i don't have his code and i don't know how he did it. any ideas?
it probably used dynamic_cast. it could be done like this at runtime:
Code:template<typename Base, typename Derived> bool InheritanceExists() { Derived* derived; return dynamic_cast<Base*>(derived); }
actually it didn't. it was a pure compile-time operation. i just found it. it's on p34 of alexandrescu's modern c++.
Boost has some interesting meta template stuff.
Originally Posted by Adak
definitely not worth pulling in boost over. the implementation is trivial, actually.
it just so happens this is in the book preview:
Modern C++ design: generic programming and design patterns applied - Andrei Alexandrescu - Google Books
Boost has a lot of other goodies, too. Boost is always worth having.
