Smart pointers in container like std::vector?

Question

I am learning about smart pointers (std::auto_ptr) and just read here and here that smart pointers (std::auto_ptr) should not be put in containers

Answer 1

Any type that you use with a standard container template must conform with the requirements for that container. In particular, the type must satisfy the requirements for CopyConstructible and Assignable types.

Many smart pointers do satisfy these requirements and may be used with standard containers but std::auto_ptr is not one of them because copies of std::auto_ptr are not equivalent to the source that they were created or assigned from.

Although some implementations of standard container may work with auto_ptr in some situations it is dangerous to rely on such implementation details.