I have a T* addressing a buffer with len elements of type T. I need this data in the form of an std::vector<T>, for certain reasons. AFAICT, I construct a vector which uses my buffer as its internal storage. Why is that?

Notes:

• Please don't suggest I use iterators - I know that's usually the way around such issues.


• I don't mind that the vector might need to copy data around if it's resized later.


• I'm asking about the reason, not about the possibility_


• This question especially baffles me now that C++ has move semantics. If we can pull an object's storage from under its feet, why not be able to shove in our own?