template<class NoThrowForwardIterator>
void uninitialized_default_construct(NoThrowForwardIterator first, NoThrowForwardIterator last);
namespace ranges {
template<nothrow-forward-iterator I, nothrow-sentinel-for<I> S>
requires default_initializable<iter_value_t<I>>
I uninitialized_default_construct(I first, S last);
template<nothrow-forward-range R>
requires default_initializable<range_value_t<R>>
borrowed_iterator_t<R> uninitialized_default_construct(R&& r);
}
template<class NoThrowForwardIterator, class Size>
NoThrowForwardIterator uninitialized_default_construct_n(NoThrowForwardIterator first, Size n);
namespace ranges {
template<nothrow-forward-iterator I>
requires default_initializable<iter_value_t<I>>
I uninitialized_default_construct_n(I first, iter_difference_t<I> n);
}