#include <iostream>
#include <new>
using namespace std;

struct foo {
    ~foo() { cout << "destructor\n"; }
    void operator delete(void* p) { 
        cout << "operator delete (not explicitly calling destructor)\n"; 
        free(p);
        cout << "After delete\n"; 
    }
};

int main()
{
    void *pv = malloc(sizeof(foo));
    foo* pf = new (pv) foo; // use placement new
    delete pf;
}

destructor
operator delete (not explicitly calling destructor)
After delete