std::experimental::ranges::iterator_t, std::experimental::ranges::sentinel_t

来自cppreference.com
< cpp‎ | experimental‎ | ranges
在标头 <experimental/ranges/range> 定义
template< class T >
using iterator_t = decltype(ranges::begin(std::declval<T&>()));
(1) (范围 TS)
template< class T >
using sentinel_t = decltype(ranges::end(std::declval<T&>()));
(2) (范围 TS)

获得范围 T 的迭代器和哨位类型。