26 Algorithms library [algorithms]

26.6 Non-modifying sequence operations [alg.nonmodifying]

26.6.17 Ends with [alg.ends.with]

template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
         class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
  requires (forward_iterator<I1> || sized_sentinel_for<S1, I1>) &&
           (forward_iterator<I2> || sized_sentinel_for<S2, I2>) &&
           indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
  constexpr bool ranges::ends_with(I1 first1, S1 last1, I2 first2, S2 last2, Pred pred = {},
                                   Proj1 proj1 = {}, Proj2 proj2 = {});

Let N1 be last1 - first1 and N2 be last2 - first2.

Returns: false if N1 < N2, otherwise ranges::equal(std::move(first1) + (N1 - N2), last1, std::move(first2), last2, pred, proj1, proj2)

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template<input_range R1, input_range R2, class Pred = ranges::equal_to, class Proj1 = identity,
         class Proj2 = identity>
  requires (forward_range<R1> || sized_range<R1>) &&
           (forward_range<R2> || sized_range<R2>) &&
           indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
  constexpr bool ranges::ends_with(R1&& r1, R2&& r2, Pred pred = {},
                                   Proj1 proj1 = {}, Proj2 proj2 = {});

Let N1 be ranges::distance(r1) and N2 be ranges::distance(r2).

Returns: false if N1 < N2, otherwise ranges::equal(views::drop(ranges::ref_view(r1), N1 - static_cast<decltype(N1)>(N2)), r2, pred, proj1, proj2)