C++ vector with dynamic item size

Question

the C++ STL vector has a lot of decent properties, but only works when the size of each item is known at run-time.

I would like to have a vector class that features

Answer 1

I think the best way forward (in terms of performance and maintaiability) is a workaround, where you wrap std::vector and std::vector in two classes that interhit a common base class with an appropriate interface.

If you want it dynamic at runtime, that's how to do it properly. It'd also help you write efficient code for processing each item, as well as accessing each element simply (but slowly).