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#include <iostream>
 
using namespace std;
struct C {
    //Obj() { cout << __func__<< endl; }
    //~Obj() { cout << __func__<< endl; }
    virtual ~C() { cout << __func__<< endl; }                     // Destructor
    C(const C&) = { cout << __func__<< endl; };               // Copy constructor
    C(C&&) = { cout << __func__<< endl; };                    // Move constructor
    C& operator=(const C&) & = { cout << __func__<< endl; };  // Copy assignment operator
    C& operator=(C&&) & = { cout << __func__<< endl; };       // Move assignment operator
};
int main()
{
    C obj1;
    C& obj2 = obj1;
 
    return 0;
}
 

prog.cpp:8:21: error: invalid pure specifier (only ‘= 0’ is allowed) before ‘cout’
     C(const C&) = { cout << __func__<< endl; };               // Copy constructor
                     ^~~~
prog.cpp:9:8: error: expected ‘)’ before ‘&&’ token
     C(C&&) = { cout << __func__<< endl; };                    // Move constructor
        ^~
prog.cpp:10:28: error: non-member function ‘C& operator=(const C&)’ cannot have ref-qualifier
     C& operator=(const C&) & = { cout << __func__<< endl; };  // Copy assignment operator
                            ^
prog.cpp:10:28: error: ‘C& operator=(const C&)’ must be a nonstatic member function
prog.cpp:10:34: error: invalid pure specifier (only ‘= 0’ is allowed) before ‘cout’
     C& operator=(const C&) & = { cout << __func__<< endl; };  // Copy assignment operator
                                  ^~~~
prog.cpp:10:59: error: expected declaration before ‘}’ token
     C& operator=(const C&) & = { cout << __func__<< endl; };  // Copy assignment operator
                                                           ^

Standard output is empty