Compared to new, make functions eliminate source code duplication, improve exception safety, and, for std::make_shard and std::allocate_shared, generate code that’s smaller and faster.

Potential use cases for std::weak_ptr include caching, observer lists, and the prevention of std::shared_ptr cycles.

std::shared_ptrs offer convenience approaching that of garbage collection for the shared lifetime management of arbitrary resources.

std::unique_ptr is a small, fast, move-only smart pointer for managing resources with exclusive-ownership semantics.

The special member functions are those ccompilers may generate on their own: default constructor, destructor, copy operations, and move operations.