Always overload matched allocation/deallocation pairs

Reason

Otherwise you get mismatched operations and chaos.

Example

class X {
    // ...
    void* operator new(size_t s);
    void operator delete(void*);
    // ...
};

Note

If you want memory that cannot be deallocated, =delete the deallocation operation. Don't leave it undeclared.

Enforcement

Flag incomplete pairs.

R.smart: Smart pointers