template <class ForwardIterator, class T>
void uninitialized_fill(ForwardIterator first, ForwardIterator last,
const T& x);
for (; first != last; ++first)
::new (static_cast<void*>(addressof(*first)))
typename iterator_traits<ForwardIterator>::value_type(x);template <class ForwardIterator, class Size, class T>
ForwardIterator uninitialized_fill_n(ForwardIterator first, Size n, const T& x);