Question

I got the following code:

set<Object*>::iterator it;
try
    {
        for (it = SetOfObjects->begin(); it != SetOfObjects->end(); ++it)
        {
            //some actions, not applicable to the question
        }
    }
    catch(...)
    {
        this->m_error_raiser->error_Name = "Station isn`t connected to Object! Use connectToObject method or list of forecast objects is empty";
        this->m_error_raiser->error_Number = 101;
        //throw (this->m_error_raiser);
    }

When instance of SetOfObjects is not created and I am trying to iterate through that set I got expected run- time error.

So I decided to handle that error and give info about it to the user by means of try catch.

My question: although I catch all exceptions thus they are considered handled, my program still terminates during run -time which contradicts to it`s behavior which I expect from it: it should continue to work because all generated exceptions were handled. What is wrong here?

Answer 1

If object is pointer and it’s not initialized, usage of such object is undefined behaviour. You can’t handle usage of such pointer by exception handling (by standard). Only initialize to 0 by default and verify that pointer is not null before usage.