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#include <iostream>
 
struct S {
  S() { std::cout << "S::S()" << std::endl; }
  ~S() { std::cout << "S::~S()" << std::endl; }
};

void f() {
  alignas(struct S) char space[sizeof(struct S)];
  S *s1 = new (&space) S;

  // ...

  delete s1;
}

#include <iostream>
 
struct S {
  S() { std::cout << "S::S()" << std::endl; }
  ~S() { std::cout << "S::~S()" << std::endl; }
};
 
void f() {
  alignas(struct S) char space[sizeof(struct S)];
  S *s1 = new (&space) S;
 
  // ...

  s1->~S();
}