Construct a default‐valued forward iterator.
Synopsis
Declared in <bslstl_forwarditerator.h>
ForwardIterator();
Description
All default‐constructed ForwardIterator objects represent non‐dereferenceable iterators into the same empty range. They do not have a singular value unless an object of the type specified by the template parameter ITER_IMP has a singular value after value‐initialization.
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