rvo.cpp

#include <iostream>

class A {
public:
  A(const char * foo) {
    std::cout << "Invoking constructor" << std::endl;
    s = std::string(foo);
  }
  A(const A& a) {
    std::cout << "Invoking copy constructor" << std::endl;
    s = a.s;
  }
  A(A&& a) {
    std::cout << "Invoking move constructor" << std::endl;
    s = a.s;
  }
  std::string s;
};

static A construct(const char * foo) {
  A a(foo);
  return a;
}

int main() {
  A a = construct("hello world");
  std::cout << "Value of a: " << a.s << std::endl;

}