cpp/iterator/istreambuf iterator/istreambuf iterator

@1-2@ Constructs an end-of-stream iterator.

@3@ Initializes the iterator and stores the value of in a data member. If is null, then end-of-stream iterator is constructed.

@4@ Initializes the iterator and stores the value of in a data member. If is null, then end-of-stream iterator is constructed.

@5@ Effectively call with the  pointer  holds.

@6@ The copy constructor is trivial and explicitly defaulted.