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    #include <iostream>

    struct A {
        A (const A& other) : x{other.x} { std::cout << "Copy ctor\n" ;}
        A (A&& other) : x{other.x} { std::cout << "Move ctor\n" ;}
        A() : x{0}  { std::cout << "Default ctor\n" ;}
        A(int x_) : x{x_}  { std::cout << "int ctor\n" ;}
        A& operator=(const A& other) { x = other.x; std::cout << "Copy assignment\n" ; return *this; }
        A& operator=(A&& other) { x = other.x; std::cout << "Move assignment\n" ; return *this; }
        int x;
    };

    int main() { A a1 = A(5); }