diff --git a/libcxx/include/CMakeLists.txt b/libcxx/include/CMakeLists.txt
--- a/libcxx/include/CMakeLists.txt
+++ b/libcxx/include/CMakeLists.txt
@@ -97,6 +97,7 @@
__algorithm/ranges_copy_n.h
__algorithm/ranges_count.h
__algorithm/ranges_count_if.h
+ __algorithm/ranges_ends_with.h
__algorithm/ranges_equal.h
__algorithm/ranges_equal_range.h
__algorithm/ranges_fill.h
diff --git a/libcxx/include/__algorithm/ranges_ends_with.h b/libcxx/include/__algorithm/ranges_ends_with.h
new file mode 100644
--- /dev/null
+++ b/libcxx/include/__algorithm/ranges_ends_with.h
@@ -0,0 +1,116 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___ALGORITHM_RANGES_ENDS_WITH_H
+#define _LIBCPP___ALGORITHM_RANGES_ENDS_WITH_H
+
+#include <__algorithm/in_in_result.h>
+#include <__algorithm/ranges_equal.h>
+#include <__config>
+#include <__functional/identity.h>
+#include <__functional/ranges_operations.h>
+#include <__iterator/concepts.h>
+#include <__iterator/distance.h>
+#include <__iterator/indirectly_comparable.h>
+#include <__ranges/access.h>
+#include <__ranges/concepts.h>
+#include <__ranges/drop_view.h>
+#include <__ranges/ref_view.h>
+#include <__utility/move.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+# pragma GCC system_header
+#endif
+
+#if _LIBCPP_STD_VER >= 23
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace ranges {
+namespace __ends_with {
+struct __fn {
+ template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Pred, class _Proj1, class _Proj2>
+ static _LIBCPP_HIDE_FROM_ABI constexpr bool __ends_with_fn_impl(
+ _Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2, _Pred __pred, _Proj1 __proj1, _Proj2 __proj2) {
+ auto __n1 = ranges::distance(__first1, __last1);
+ auto __n2 = ranges::distance(__first2, __last2);
+ if (__n2 > __n1)
+ return false;
+
+ ranges::advance(__first1, (__n1 - __n2));
+ auto __unwrapped1 = std::__unwrap_range(std::move(__first1), std::move(__last1));
+ auto __unwrapped2 = std::__unwrap_range(std::move(__first2), std::move(__last2));
+ return ranges::equal(
+ std::move(__unwrapped1.first),
+ std::move(__unwrapped1.second),
+ std::move(__unwrapped2.first),
+ std::move(__unwrapped2.second),
+ __pred,
+ __proj1,
+ __proj2);
+ }
+
+ template <input_iterator _Iter1,
+ sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2,
+ sentinel_for<_Iter2> _Sent2,
+ class _Pred = ranges::equal_to,
+ class _Proj1 = identity,
+ class _Proj2 = identity>
+ requires(forward_iterator<_Iter1> || sized_sentinel_for<_Sent1, _Iter1>) &&
+ (forward_iterator<_Iter2> || sized_sentinel_for<_Sent2, _Iter2>) &&
+ indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
+ _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(
+ _Iter1 __first1,
+ _Sent1 __last1,
+ _Iter2 __first2,
+ _Sent2 __last2,
+ _Pred __pred = {},
+ _Proj1 __proj1 = {},
+ _Proj2 __proj2 = {}) const {
+ return __ends_with_fn_impl(
+ std::move(__first1),
+ std::move(__last1),
+ std::move(__first2),
+ std::move(__last2),
+ std::ref(__pred),
+ std::ref(__proj1),
+ std::ref(__proj2));
+ }
+
+ template <input_range _Range1,
+ input_range _Range2,
+ class _Pred = ranges::equal_to,
+ class _Proj1 = identity,
+ class _Proj2 = identity>
+ requires(forward_range<_Range1> || sized_range<_Range1>) && (forward_range<_Range2> || sized_range<_Range2>) &&
+ indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>, _Pred, _Proj1, _Proj2>
+ _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(
+ _Range1&& __range1, _Range2&& __range2, _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const {
+ return __ends_with_fn_impl(
+ std::move(ranges::begin(__range1)),
+ std::move(ranges::end(__range1)),
+ std::move(ranges::begin(__range2)),
+ std::move(ranges::end(__range2)),
+ std::ref(__pred),
+ std::ref(__proj1),
+ std::ref(__proj2));
+ }
+};
+} // namespace __ends_with
+
+inline namespace __cpo {
+inline constexpr auto ends_with = __ends_with::__fn{};
+} // namespace __cpo
+} // namespace ranges
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP_STD_VER >= 23
+
+#endif // _LIBCPP___ALGORITHM_RANGES_ENDS_WITH_H
diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm
--- a/libcxx/include/algorithm
+++ b/libcxx/include/algorithm
@@ -437,6 +437,22 @@
template<input_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
constexpr bool ranges::any_of(R&& r, Pred pred, Proj proj = {}); // since C++20
+
+ 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 = {}); // since C++23
+
+ 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 = {}); // since C++23
template<input_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
@@ -1818,6 +1834,7 @@
#include <__algorithm/ranges_copy_n.h>
#include <__algorithm/ranges_count.h>
#include <__algorithm/ranges_count_if.h>
+#include <__algorithm/ranges_ends_with.h>
#include <__algorithm/ranges_equal.h>
#include <__algorithm/ranges_equal_range.h>
#include <__algorithm/ranges_fill.h>
diff --git a/libcxx/include/module.modulemap.in b/libcxx/include/module.modulemap.in
--- a/libcxx/include/module.modulemap.in
+++ b/libcxx/include/module.modulemap.in
@@ -374,6 +374,7 @@
}
module ranges_count { private header "__algorithm/ranges_count.h" }
module ranges_count_if { private header "__algorithm/ranges_count_if.h" }
+ module ranges_ends_with { private header "__algorithm/ranges_ends_with.h" }
module ranges_equal { private header "__algorithm/ranges_equal.h" }
module ranges_equal_range {
private header "__algorithm/ranges_equal_range.h"
diff --git a/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_comparators.pass.cpp b/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_comparators.pass.cpp
--- a/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_comparators.pass.cpp
+++ b/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_comparators.pass.cpp
@@ -103,7 +103,8 @@
(void)std::ranges::copy_if(first, last, first2, UnaryTrue(&copies)); assert(copies == 0);
(void)std::ranges::copy_if(a, first2, UnaryTrue(&copies)); assert(copies == 0);
#if TEST_STD_VER > 20
- //(void)std::ranges::ends_with(first, last, first2, last2, Equal(&copies)); assert(copies == 0);
+ (void)std::ranges::ends_with(first, last, first2, last2, Equal(&copies)); assert(copies == 0);
+ (void)std::ranges::ends_with(a, b, Equal(&copies)); assert(copies == 0);
#endif
(void)std::ranges::equal(first, last, first2, last2, Equal(&copies)); assert(copies == 0);
(void)std::ranges::equal(a, b, Equal(&copies)); assert(copies == 0);
diff --git a/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_projections.pass.cpp b/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_projections.pass.cpp
--- a/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_projections.pass.cpp
+++ b/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_projections.pass.cpp
@@ -87,7 +87,8 @@
(void)std::ranges::copy_if(first, last, first2, UnaryTrue(), Proj(&copies)); assert(copies == 0);
(void)std::ranges::copy_if(a, first2, UnaryTrue(), Proj(&copies)); assert(copies == 0);
#if TEST_STD_VER > 20
- //(void)std::ranges::ends_with(first, last, first2, last2, Equal(), Proj(&copies), Proj(&copies)); assert(copies == 0);
+ (void)std::ranges::ends_with(first, last, first2, last2, Equal(), Proj(&copies), Proj(&copies)); assert(copies == 0);
+ (void)std::ranges::ends_with(a, b, Equal(), Proj(&copies), Proj(&copies)); assert(copies == 0);
#endif
(void)std::ranges::equal(first, last, first2, last2, Equal(), Proj(&copies), Proj(&copies)); assert(copies == 0);
(void)std::ranges::equal(a, b, Equal(), Proj(&copies), Proj(&copies)); assert(copies == 0);
diff --git a/libcxx/test/libcxx/private_headers.verify.cpp b/libcxx/test/libcxx/private_headers.verify.cpp
--- a/libcxx/test/libcxx/private_headers.verify.cpp
+++ b/libcxx/test/libcxx/private_headers.verify.cpp
@@ -134,6 +134,7 @@
#include <__algorithm/ranges_copy_n.h> // expected-error@*:* {{use of private header from outside its module: '__algorithm/ranges_copy_n.h'}}
#include <__algorithm/ranges_count.h> // expected-error@*:* {{use of private header from outside its module: '__algorithm/ranges_count.h'}}
#include <__algorithm/ranges_count_if.h> // expected-error@*:* {{use of private header from outside its module: '__algorithm/ranges_count_if.h'}}
+#include <__algorithm/ranges_ends_with.h> // expected-error@*:* {{use of private header from outside its module: '__algorithm/ranges_ends_with.h'}}
#include <__algorithm/ranges_equal.h> // expected-error@*:* {{use of private header from outside its module: '__algorithm/ranges_equal.h'}}
#include <__algorithm/ranges_equal_range.h> // expected-error@*:* {{use of private header from outside its module: '__algorithm/ranges_equal_range.h'}}
#include <__algorithm/ranges_fill.h> // expected-error@*:* {{use of private header from outside its module: '__algorithm/ranges_fill.h'}}
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.ends_with/ranges.ends_with.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.ends_with/ranges.ends_with.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.ends_with/ranges.ends_with.pass.cpp
@@ -0,0 +1,271 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// <algorithm>
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+
+// 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 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 = {});
+// template<input_range R1, input_range R2, class Pred = ranges::equal_to, class Proj1 = identity,
+// class Proj2 = identity>
+// requires 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 = {});
+
+#include <algorithm>
+#include <array>
+#include <ranges>
+
+#include "almost_satisfies_types.h"
+#include "test_iterators.h"
+
+template <class Iter1, class Sent1 = Iter1, class Iter2 = int*, class Sent2 = Iter2>
+concept HasEndsWithIt = requires(Iter1 first1, Sent1 last1, Iter2 first2, Sent2 last2) {
+ std::ranges::ends_with(first1, last1, first2, last2);
+};
+
+static_assert(HasEndsWithIt<int*>);
+static_assert(!HasEndsWithIt<ForwardIteratorNotDerivedFrom>);
+static_assert(!HasEndsWithIt<ForwardIteratorNotIncrementable>);
+static_assert(!HasEndsWithIt<int*, SentinelForNotSemiregular>);
+static_assert(!HasEndsWithIt<int*, int*, int**>); // not indirectly comparable
+static_assert(!HasEndsWithIt<int*, SentinelForNotWeaklyEqualityComparableWith>);
+static_assert(!HasEndsWithIt<int*, int*, ForwardIteratorNotDerivedFrom>);
+static_assert(!HasEndsWithIt<int*, int*, ForwardIteratorNotIncrementable>);
+static_assert(!HasEndsWithIt<int*, int*, int*, SentinelForNotSemiregular>);
+static_assert(!HasEndsWithIt<int*, int*, int*, SentinelForNotWeaklyEqualityComparableWith>);
+
+template <class Range1, class Range2 = UncheckedRange<int*>>
+concept HasEndsWithR = requires(Range1 range1, Range2 range2) { std::ranges::ends_with(range1, range2); };
+
+static_assert(HasEndsWithR<UncheckedRange<int*>>);
+static_assert(!HasEndsWithR<ForwardRangeNotDerivedFrom>);
+static_assert(!HasEndsWithR<ForwardIteratorNotIncrementable>);
+static_assert(!HasEndsWithR<ForwardRangeNotSentinelSemiregular>);
+static_assert(!HasEndsWithR<ForwardRangeNotSentinelEqualityComparableWith>);
+static_assert(!HasEndsWithR<UncheckedRange<int*>, UncheckedRange<int**>>); // not indirectly comparable
+static_assert(!HasEndsWithR<UncheckedRange<int*>, ForwardRangeNotDerivedFrom>);
+static_assert(!HasEndsWithR<UncheckedRange<int*>, ForwardRangeNotIncrementable>);
+static_assert(!HasEndsWithR<UncheckedRange<int*>, ForwardRangeNotSentinelSemiregular>);
+static_assert(!HasEndsWithR<UncheckedRange<int*>, ForwardRangeNotSentinelEqualityComparableWith>);
+
+// clang-format off
+template <class Iter1, class Sent1 = Iter1, class Iter2, class Sent2 = Iter2>
+constexpr void test_iterators() {
+ { // simple tests
+ int a[] = {1, 2, 3, 4, 5, 6};
+ int p[] = {4, 5, 6};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
+ {
+ [[maybe_unused]] std::same_as<bool> decltype(auto) ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(ret);
+ }
+ {
+ [[maybe_unused]] std::same_as<bool> decltype(auto) ret = std::ranges::ends_with(whole, suffix);
+ assert(ret);
+ }
+ }
+
+ { // suffix doesn't match
+ int a[] = {1, 2, 3, 4, 5, 6};
+ int p[] = {1, 2, 3};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(!ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix);
+ assert(!ret);
+ }
+ }
+
+ { // range consists of just one element
+ int a[] = {1};
+ int p[] = {1};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 1)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 1)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix);
+ assert(ret);
+ }
+ }
+
+ { // suffix consists of just one element
+ int a[] = {5, 1, 2, 4, 3};
+ int p[] = {3};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 5)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 1)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix);
+ assert(ret);
+ }
+ }
+
+ { // range and suffix are identical
+ int a[] = {1, 2, 3, 4, 5, 6};
+ int p[] = {1, 2, 3, 4, 5, 6};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 6)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix);
+ assert(ret);
+ }
+ }
+
+ { // suffix is longer than range
+ int a[] = {3, 4, 5, 6, 7, 8};
+ int p[] = {1, 2, 3, 4, 5, 6, 7, 8};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 8)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(!ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix);
+ assert(!ret);
+ }
+ }
+
+ { // suffix has zero length
+ int a[] = {1, 2, 3, 4, 5, 6};
+ int p[] = {};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix);
+ assert(ret);
+ }
+ }
+
+ { // range has zero length
+ int a[] = {};
+ int p[] = {1, 2, 3, 4, 5, 6, 7, 8};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 8)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(!ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix);
+ assert(!ret);
+ }
+ }
+
+ { // subarray
+ int a[] = {0, 3, 5, 10, 7, 3, 5, 89, 3, 5, 2, 1, 8, 6};
+ int p[] = {3, 5};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 13)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 2)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(!ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix);
+ assert(!ret);
+ }
+ }
+
+ { // repeated suffix
+ int a[] = {8, 6, 3, 5, 1, 2};
+ int p[] = {1, 2, 1, 2};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 4)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end());
+ assert(!ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix);
+ assert(!ret);
+ }
+ }
+
+ { // check that the predicate is used
+ int a[] = {5, 1, 3, 2, 7};
+ int p[] = {-2, -7};
+ auto pred = [](int l, int r) { return l * -1 == r; };
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 5)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 2)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end(), pred);
+ assert(ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix, pred);
+ assert(ret);
+ }
+ }
+
+ { // check that the projections are used
+ int a[] = {1, 3, 15, 1, 2, 1};
+ int p[] = {2, 1, 2};
+ auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+ auto suffix = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
+ {
+ bool ret = std::ranges::ends_with(whole.begin(), whole.end(), suffix.begin(), suffix.end(), {},
+ [](int i) { return i - 3; },
+ [](int i) { return i * -1; });
+ assert(ret);
+ }
+ {
+ bool ret = std::ranges::ends_with(whole, suffix, {},
+ [](int i) { return i - 3; },
+ [](int i) { return i * -1; });
+ assert(ret);
+ }
+ }
+}
+
+constexpr bool test() {
+ types::for_each(types::cpp20_input_iterator_list<int*>{}, []<class Iter2>() {
+ types::for_each(types::cpp20_input_iterator_list<int*>{}, []<class Iter1>() {
+ if constexpr (std::forward_iterator<Iter1> && std::forward_iterator<Iter2>)
+ test_iterators<Iter1, Iter1, Iter2, Iter2>();
+ if constexpr (std::forward_iterator<Iter2>)
+ test_iterators<Iter1, sized_sentinel<Iter1>, Iter2, Iter2>();
+ if constexpr (std::forward_iterator<Iter1>)
+ test_iterators<Iter1, Iter1, Iter2, sized_sentinel<Iter2>>();
+ test_iterators<Iter1, sized_sentinel<Iter1>, Iter2, sized_sentinel<Iter2>>();
+ });
+ });
+
+ return true;
+}
+
+int main(int, char**) {
+ test();
+ static_assert(test());
+
+ return 0;
+}
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_differing_projections.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_differing_projections.pass.cpp
--- a/libcxx/test/std/algorithms/ranges_robust_against_differing_projections.pass.cpp
+++ b/libcxx/test/std/algorithms/ranges_robust_against_differing_projections.pass.cpp
@@ -54,6 +54,7 @@
auto proj1 = [](int x) { return x * -1; };
auto proj2 = [](A a) { return a.x * -1; };
+ test(std::ranges::ends_with, in, in2, eq, proj1, proj2);
test(std::ranges::equal, in, in2, eq, proj1, proj2);
test(std::ranges::lexicographical_compare, in, in2, eq, proj1, proj2);
test(std::ranges::is_permutation, in, in2, eq, proj1, proj2);
@@ -77,7 +78,7 @@
test(std::ranges::set_union, in, in2, out2, less, proj1, proj2);
#if TEST_STD_VER > 20
test(std::ranges::starts_with, in, in2, eq, proj1, proj2);
- // test(std::ranges::ends_with, in, in2, eq, proj1, proj2);
+ test(std::ranges::ends_with, in, in2, eq, proj1, proj2);
#endif
return true;
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.pass.cpp
--- a/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.pass.cpp
+++ b/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.pass.cpp
@@ -68,6 +68,7 @@
test(std::ranges::any_of, in, unary_pred);
test(std::ranges::all_of, in, unary_pred);
+ test(std::ranges::ends_with, in, in2, binary_pred);
test(std::ranges::none_of, in, unary_pred);
test(std::ranges::find_if, in, unary_pred);
test(std::ranges::find_if_not, in, unary_pred);
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.pass.cpp
--- a/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.pass.cpp
+++ b/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.pass.cpp
@@ -73,6 +73,7 @@
test(std::ranges::any_of, in, &Foo::unary_pred, &Bar::val);
test(std::ranges::all_of, in, &Foo::unary_pred, &Bar::val);
+ test(std::ranges::ends_with, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
test(std::ranges::none_of, in, &Foo::unary_pred, &Bar::val);
test(std::ranges::find, in, x, &Bar::val);
test(std::ranges::find_if, in, &Foo::unary_pred, &Bar::val);
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp
--- a/libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp
+++ b/libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp
@@ -73,6 +73,7 @@
test(std::ranges::any_of, in, unary_pred);
test(std::ranges::all_of, in, unary_pred);
+ test(std::ranges::ends_with, in, in2);
test(std::ranges::none_of, in, unary_pred);
test(std::ranges::find, in, x);
test(std::ranges::find_if, in, unary_pred);
diff --git a/libcxx/test/std/library/description/conventions/customization.point.object/niebloid.compile.pass.cpp b/libcxx/test/std/library/description/conventions/customization.point.object/niebloid.compile.pass.cpp
--- a/libcxx/test/std/library/description/conventions/customization.point.object/niebloid.compile.pass.cpp
+++ b/libcxx/test/std/library/description/conventions/customization.point.object/niebloid.compile.pass.cpp
@@ -71,7 +71,9 @@
static_assert(test(std::ranges::copy_n, a, 10, a));
static_assert(test(std::ranges::count, a, 42));
static_assert(test(std::ranges::count_if, a, odd));
-//static_assert(test(std::ranges::ends_with, a, a));
+#if TEST_STD_VER > 20
+static_assert(test(std::ranges::ends_with, a, a));
+#endif
static_assert(test(std::ranges::equal, a, a));
static_assert(test(std::ranges::equal_range, a, 42));
static_assert(test(std::ranges::fill, a, 42));