assign_self.cpp

#include <iostream>

struct A {
  int x;
  A(int x) : x(x) {}
  void assign_self(A& a) {
    *this = a;
  }
};

int main() {
  A a1(1);
  A a2(2);
  a1.assign_self(a2);
  std::cout << a1.x << std::endl;
}