- https://godbolt.org/z/8hh7a633v - nested pointer of the parent class that is allocated on the heap won't be deallocated automatically if
deletethe parent object only, we need todeleteeach individual of the class's data member as well - https://godbolt.org/z/eKMvfqP7v - compare passing a pointer by value and by reference
- https://godbolt.org/z/eaozssao5 - double pointer memory deletion handling (no leak, checked with valgrind on Linux)
- https://godbolt.org/z/rEahKqGsf - double pointer memory deletion handling with the main pointer array is as of opaque pointer type (no leak, checked with valgrind on Linux)
- https://godbolt.org/z/bbErcGsGG - validate that ::operator new is just a global scope function that we can call (included store address of function into std::function, and demonstrate the use of allocate memory, and deallocate memory using ::operator new/delete, and placement new)
- https://godbolt.org/z/zfEezvrK1 - share common code in implementing output operator for a custom type without having to duplicate implementation for both ASCII string, and wide-string character
- https://godbolt.org/z/39ETTT331 - making destructor method as private has implications that we cannot explicitly delete the pointer, and it cannot automatically destroy itself after it goes out of scope