2017-09-11 7:12 GMT+02:00 François Dumont <frs.dum...@gmail.com>: > When user declare a container iterator like that: > > std::forward_list<int>::iterator it; > > There is no reason to initialize it with a null node pointer. It is just an > uninitialized iterator which is invalid to use except to initialize it.
While that is correct, for every forward iterator (and std::forward_list<int>::iterator meets these requirements), it is also required that a value-initialized iterator can be compared against other initialized iterators, so this reduces the amount of freedom to define a default constructor for such iterators even when used to default-initialize. This is not meant as a showstopper argument, since I have not fully understood of what you are planning, but just a reminder. - Daniel
