I'm skeptical with the ability to have movable objects with just a dedicated allocator. How do you handle that with only allocate() and deallocate() ? Edit² @b

I'm skeptical with the ability to have movable objects with just a dedicated allocator. How do you handle that with only allocate() and deallocate() ? Edit² @bnegreve: but how do you handle moved blocks then ? And this would involve copying all objects anyway, because this is the std::vector's logic to allocate+memcpy+deallocate when the capacity is reached. The only solution is to ... rewrite std::vector, which is precisely what FB did :)