23 General utilities library [utilities]

23.10 Memory [memory]

23.10.10 Specialized algorithms [specialized.algorithms]

23.10.10.2 uninitialized_­default_­construct [uninitialized.construct.default]

template <class ForwardIterator> void uninitialized_default_construct(ForwardIterator first, ForwardIterator last);

for (; first != last; ++first)
  ::new (static_cast<void*>(addressof(*first)))
    typename iterator_traits<ForwardIterator>::value_type;

template <class ForwardIterator, class Size> ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n);

for (; n>0; (void)++first, --n)
  ::new (static_cast<void*>(addressof(*first)))
    typename iterator_traits<ForwardIterator>::value_type;
return first;