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#include <iostream>
 
class A {
private:
    int *x;
public:
    A() { x = new int; *(A::x) = 0; printme("A()"); }
    A(const int *y) { x = new int; *(A::x) = *y; printme("A(const int*)"); }
    ~A() { printme("~A()"); delete x; }
    void operator = (const int *y) { printme("before"); A(y); printme("after");}
 
    void printme(const char* s) const
    { std::cout << s << ": " << this << ": " << *x << '\n'; }
};
 
int main() {
    A a;
    int y = 3;
    a = &y;
}

prog.cpp: In member function ‘void A::operator=(const int*)’:
prog.cpp:10:60: error: declaration of ‘A y’ shadows a parameter
     void operator = (const int *y) { printme("before"); A(y); printme("after");}
                                                            ^

Standard output is empty