How can I create a shared_ptr to a std::vector?

Question

I need to create a shared_ptr to a std::vector, what is the correct syntax?

std::vector mVector;
shared_ptr> mSha         


        

Answer 1

your code doesn't compile because you are assigning a raw pointer '&mVector' to smart pointer 'mSharedPtr' which are two different objects and no casting is allowed.

you can do that by other approaches

(1) intializing your shared_ptr with the raw pointer from the begining

std::shared_ptr> sPtr (&mVector);

(2) using reset() method of shared_ptr

std::shared_ptr> sPtr;
sPtr.reset(&mVector);

assigning a stack object raw pointer to smart pointer , you should also supply an empty deleter to the smart pointer, so that the smart pointer doesn't delete the object when it is still on the stack.

std::shared_ptr> sPtr (&mVector,[](std::vector*){});