Are there any valid use cases to use new and delete, raw pointers or c-style arrays with modern C++?

Question

Here\'s a notable video (Stop teaching C) about that paradigm change to take in teaching the c++ language.

And an also notable blog post

Answer 1

You can still use new and delete if we want to create our own lightweight memory allocation mechanism. For example

1.Using In-Place new : Generally used for allocating from preallocated memory;

char arr[4];

int * intVar = new (&arr) int; // assuming int of size 4 bytes

2.Using Class Specific Allocators : If we want a custom allocator for our own classes.

class AwithCustom {

public:
    void * operator new(size_t size) {
         return malloc(size);
    }

    void operator delete(void * ptr) {
          free(ptr);
    }
};