Does an object destruction invalidate pointers?

Asked Jul 09 '20 at 20:41

Active Jul 09 '20 at 20:41

Viewed 39 times

In the code below, is sstill pointing to valid memory after s1 is destroyed ? If yes, how does that work ? If no, anything we can do to avoid it ?

#include <iostream>
struct S {
    S(){std::cout<<"S()\n";}
    ~S(){std::cout<<"~S()\n";}
};

int main(){
    S *s;
    {
        S s1;
        s=&s1;
    }
}

//output:
//S()
//~S()

asked Jul 09 '20 at 20:41

Midnight Exigent

1

very related: https://stackoverflow.com/questions/6441218/can-a-local-variables-memory-be-accessed-outside-its-scope – NathanOliver Jul 09 '20 at 20:43
*"If no, anything we can do to avoid it ?"* - Now that, is the million dollar question. And it mostly revolves around program design and training people – StoryTeller - Unslander Monica Jul 09 '20 at 20:48
I think the best way to avoid this is experience. This is something I never do because I know this is Undefined Behavior. – drescherjm Jul 09 '20 at 23:13

Does an object destruction invalidate pointers?

0 Answers0