Mastering the C++17 STL

A final warning

The mini-ecosystem of shared_ptr, weak_ptr, and enable_shared_from_this is one of the coolest parts of modern C++; it can give your code the safety of a garbage-collected language while preserving the speed and deterministic destruction that have always characterized C++. However, be careful not to abuse shared_ptr! Most of your C++ code shouldn't be using shared_ptr at all, because you shouldn't be sharing the ownership of heap-allocated objects. Your first preference should always be to avoid heap-allocation altogether (by using value semantics); your second preference should be to make sure each heap-allocated object has a unique owner (by using std::unique_ptr<T>); and only if both of those are really impossible should ...