Why is this vector iterator not incrementable?

Question

I\'m trying to delete the vector\'s content and I\'m getting an error - vector iterator is not incrementable, why is that?

This is my destructor:

C         


        

Answer 1

This is not relevant to the original problem posted above, but Google search on the error takes me to this page so I am posting it here for anyone to see.

I ran into this error message recently and all lines of codes checked out (there was no 'erase' or anything alike; the vector was merely read).

Eventually, I realized that there is a problem with nested loops.

For example, consider something like this:

`for (it=begin(); it!=end();i++)
{
    for (; it!=end();i++)
    {
    }
}`

When you are done with the nested loop, it will increment the iterator - and then, the parent loop will increment it again(!), ultimately making the iterator step over the end(). I.e. it would be "end()+1" if there were such a thing. Consequently, the parent loop throws this error at the next check.

To get around this, I ended up insert this line after the child loop:

`if (it == vStringList.end()) --it;`

Dirty, but works :D

I know it may be obvious to some, but I've been scratching my head over this for a while, lol