C++ Use of smart pointers inside STL containers -

C++ Use of smart pointers inside STL containers -

what benefit of using smart pointers within stl containers ( vectors, maps etc... ) knowing these containers manages memory ?

example:

std::vector<std::unique_ptr<int>>

instead of

std::vector<int*>

if objects pointers not plenty manage memory pointers occupy. need manage pointers point to. thought store objects pointed instead of pointers (in case of illustration std::vector<int> appropriate), however, in case have polymorphic objects not possible.

c++ stl smart-pointers