std::experimental::ranges::Sentinel

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template < class S, class I >

concept bool Sentinel =
    Semiregular<S> && Iterator<I> &&

    WeaklyEqualityComparableWith<S, I> ;
(ranges TS)

The Sentinel concept specifies the relationship between an Iterator type and a Semiregular

Let s and i be values of type S and I, respectively, such that [is) denotes a range. Sentinel<S, I>

  • i == s is well-defined.
  • If bool(i != s) then i is dereferenceable and [ ++i s )

The domain of == can change over time. Given an iterator i and sentinel s such that [ i s ) denotes a range and i != s, [ i s ) is not required to continue to denote a range after incrementing any iterator equal to i (and so i == s