Deny std::vector from deleting its data

Question

I have the following case:

T* get_somthing(){
    std::vector vec; //T is trivally-copyable
    //fill vec
    T* temp = new T[vec.size()];
    memc         


        

Answer 1

In C++11 there is no option to release the buffer from the vector.

Such extension to standard was proposed to C++17: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4359.pdf but, as T.C. pointed out, it was rejected: https://issues.isocpp.org/show_bug.cgi?id=81

So no luck in the standard for that. Also a related question was posted that is already answered and explains the same problem: Destroy std::vector without releasing memory

If you are able to mess with either of these libraries you can try custom allocators or other weird stuff (like binding yourself to internal implementation of library and messing with private vector data), but really, don't.