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

Defined in header `<ranges>`
template <class T> using iterator_t = decltype(ranges::begin(declval<T&>()));	(1)	(since C++20)
template <class T> using sentinel_t = decltype(ranges::end(declval<T&>()));	(2)	(since C++20)

1) Used to obtain the iterator type of the type T.

2) Used to obtain the sentinel type of the type T.

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