Are there any downsides with using make_shared to create a shared_ptr

Question

Are there any downsides with using make_shared() instead of using shared_ptr(new T).

Boost documentation states

Answer 1

With make shared you can not specify how allocation and deallocation of the held object will be done.

When that is desired, use std::allocate_shared instead:

std::vector> avec; 
std::allocator aAllocator;
avec.push_back(std::allocate_shared(aAllocator,"hi there!"));

Note that the vector does not need to be informed about the allocator!

For making a custom allocator, have a look here https://stackoverflow.com/a/542339/1149664