C++ catching dangling reference

Question

Suppose the following piece of code

struct S {
    S(int & value): value_(value) {}
    int & value_;
};

S function() {
    int value = 0;
    retur         


        

Answer 1

There is a guideline I follow after having been beaten by this exact thing:

When a class has a reference member (or a pointer to something that can have a lifetime you don't control), make the object non-copyable.

This way, you reduce the chances of escaping the scope with a dangling reference.