Question

Hi to all =)
I’ve a little curiosity
If I’ve the following function, that close the program calling sys.exit:

void stop(int state){
    std::exit(state);
}

Now, I want to call this function, but without exit the program.
So, I want to “catch” the std::exit command… is there a method to do it?

Answer 1

Do the same as with tail recursion: Have the offending function call always be the last statement in the execution path, or not occur at all:

void stop(int state)
{
  const bool exitReally = DecideWhetherToExit();
  if (exitReally)
    std::exit(state);
}

This function will never do anything after calling std::exit, but might also not call it at all, decided after evaluating whatever you want in another function, for example.