Replaces the value in a std::experimental::shared_ptr with a copy of the
value in another std::experimental::shared_ptr, decreasing the
use_count()
of the old value and increasing the use_count() of the new one.
template<typename Other> shared_ptr& operator=(shared_ptr<Other> const& other) noexcept;
template<typename Other> shared_ptr& operator=(shared_ptr<Other> const& other) noexcept{ shared_ptr temp(other); this->swap(temp); return *this; }
#include <experimental/atomic>