Initial commit

module/jni/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/ranges.replace.pass.cpp

@@ -0,0 +1,200 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// template<input_iterator I, sentinel_for<I> S, class T1, class T2, class Proj = identity>
+//   requires indirectly_writable<I, const T2&> &&
+//            indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T1*>
+//   constexpr I
+//     ranges::replace(I first, S last, const T1& old_value, const T2& new_value, Proj proj = {});
+// template<input_range R, class T1, class T2, class Proj = identity>
+//   requires indirectly_writable<iterator_t<R>, const T2&> &&
+//            indirect_binary_predicate<ranges::equal_to, projected<iterator_t<R>, Proj>, const T1*>
+//   constexpr borrowed_iterator_t<R>
+//     ranges::replace(R&& r, const T1& old_value, const T2& new_value, Proj proj = {});
+
+#include <algorithm>
+#include <array>
+#include <cassert>
+#include <ranges>
+
+#include "almost_satisfies_types.h"
+#include "boolean_testable.h"
+#include "test_iterators.h"
+
+template <class Iter, class Sent = sentinel_wrapper<Iter>>
+concept HasReplaceIt = requires(Iter iter, Sent sent) { std::ranges::replace(iter, sent, 0, 0); };
+
+static_assert(HasReplaceIt<int*>);
+static_assert(!HasReplaceIt<InputIteratorNotDerivedFrom>);
+static_assert(!HasReplaceIt<InputIteratorNotIndirectlyReadable>);
+static_assert(!HasReplaceIt<InputIteratorNotInputOrOutputIterator>);
+static_assert(!HasReplaceIt<int*, SentinelForNotSemiregular>);
+static_assert(!HasReplaceIt<int*, SentinelForNotWeaklyEqualityComparableWith>);
+static_assert(!HasReplaceIt<int**>); // not indirectly_writable
+static_assert(!HasReplaceIt<IndirectBinaryPredicateNotIndirectlyReadable>);
+
+template <class Range>
+concept HasReplaceR = requires(Range range) { std::ranges::replace(range, 0, 0); };
+
+static_assert(HasReplaceR<UncheckedRange<int*>>);
+static_assert(!HasReplaceR<InputRangeNotDerivedFrom>);
+static_assert(!HasReplaceR<InputRangeNotIndirectlyReadable>);
+static_assert(!HasReplaceR<InputRangeNotInputOrOutputIterator>);
+static_assert(!HasReplaceR<InputRangeNotSentinelSemiregular>);
+static_assert(!HasReplaceR<InputRangeNotSentinelEqualityComparableWith>);
+static_assert(!HasReplaceR<UncheckedRange<int**>>); // not indirectly_writable
+static_assert(!HasReplaceR<InputRangeIndirectBinaryPredicateNotIndirectlyReadable>);
+
+template <int N>
+struct Data {
+  std::array<int, N> input;
+  int oldval;
+  int newval;
+  std::array<int, N> expected;
+};
+
+template <class Iter, class Sent, int N>
+constexpr void test(Data<N> d) {
+  {
+    auto a = d.input;
+    std::same_as<Iter> decltype(auto) ret = std::ranges::replace(Iter(a.data()), Sent(Iter(a.data() + N)),
+                                                                 d.oldval,
+                                                                 d.newval);
+    assert(base(ret) == a.data() + N);
+    assert(a == d.expected);
+  }
+  {
+    auto a = d.input;
+    auto range = std::ranges::subrange(Iter(a.data()), Sent(Iter(a.data() + N)));
+    std::same_as<Iter> decltype(auto) ret = std::ranges::replace(range, d.oldval, d.newval);
+    assert(base(ret) == a.data() + N);
+    assert(a == d.expected);
+  }
+}
+
+template <class Iter, class Sent = Iter>
+constexpr void test_iterators() {
+  // simple test
+  test<Iter, Sent, 4>({.input = {1, 2, 3, 4}, .oldval = 2, .newval = 23, .expected = {1, 23, 3, 4}});
+  // no match
+  test<Iter, Sent, 4>({.input = {1, 2, 3, 4}, .oldval = 5, .newval = 23, .expected = {1, 2, 3, 4}});
+  // all match
+  test<Iter, Sent, 4>({.input = {1, 1, 1, 1}, .oldval = 1, .newval = 23, .expected = {23, 23, 23, 23}});
+  // empty range
+  test<Iter, Sent, 0>({.input = {}, .oldval = 1, .newval = 23, .expected = {}});
+  // single element range
+  test<Iter, Sent, 1>({.input = {1}, .oldval = 1, .newval = 2, .expected = {2}});
+}
+
+constexpr bool test() {
+  test_iterators<cpp17_input_iterator<int*>, sentinel_wrapper<cpp17_input_iterator<int*>>>();
+  test_iterators<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_input_iterator<int*>>>();
+  test_iterators<forward_iterator<int*>>();
+  test_iterators<bidirectional_iterator<int*>>();
+  test_iterators<random_access_iterator<int*>>();
+  test_iterators<contiguous_iterator<int*>>();
+  test_iterators<int*>();
+
+  { // check that the projection is used
+    struct S {
+      constexpr S(int i_) : i(i_) {}
+      int i;
+    };
+    {
+      S a[] = {1, 2, 3, 4};
+      std::ranges::replace(a, a + 4, 3, S{0}, &S::i);
+    }
+    {
+      S a[] = {1, 2, 3, 4};
+      std::ranges::replace(a, 3, S{0}, &S::i);
+    }
+  }
+
+  { // check that std::invoke is used
+    struct S {
+      constexpr S(int i_) : i(i_) {}
+      constexpr bool operator==(const S&) const = default;
+      constexpr const S& identity() const { return *this; }
+      int i;
+    };
+    {
+      S a[] = {1, 2, 3, 4};
+      auto ret = std::ranges::replace(std::begin(a), std::end(a), S{1}, S{2}, &S::identity);
+      assert(ret == a + 4);
+    }
+    {
+      S a[] = {1, 2, 3, 4};
+      auto ret = std::ranges::replace(a, S{1}, S{2}, &S::identity);
+      assert(ret == a + 4);
+    }
+  }
+
+  { // check that the implicit conversion to bool works
+    {
+      StrictComparable<int> a[] = {1, 2, 2, 4};
+      auto ret = std::ranges::replace(std::begin(a), std::end(a), 1, 2);
+      assert(ret == std::end(a));
+    }
+    {
+      StrictComparable<int> a[] = {1, 2, 2, 4};
+      auto ret = std::ranges::replace(a, 1, 2);
+      assert(ret == std::end(a));
+    }
+  }
+
+  { // check that T1 and T2 can be different types
+    {
+      StrictComparable<int> a[] = {1, 2, 2, 4};
+      auto ret = std::ranges::replace(std::begin(a), std::end(a), '\0', 2ull);
+      assert(ret == std::end(a));
+    }
+    {
+      StrictComparable<int> a[] = {1, 2, 2, 4};
+      auto ret = std::ranges::replace(a, '\0', 2ull);
+      assert(ret == std::end(a));
+    }
+  }
+
+  { // check that std::ranges::dangling is returned
+    [[maybe_unused]] std::same_as<std::ranges::dangling> decltype(auto) ret =
+        std::ranges::replace(std::array {1, 2, 3, 4}, 1, 1);
+  }
+
+  { // check that the complexity requirements are met
+    {
+      auto projectionCount = 0;
+      auto proj = [&](int i) { ++projectionCount; return i; };
+      int a[] = {1, 2, 3, 4, 5};
+      auto ret = std::ranges::replace(std::begin(a), std::end(a), 1, 2, proj);
+      assert(ret == a + 5);
+      assert(projectionCount == 5);
+    }
+    {
+      auto projectionCount = 0;
+      auto proj = [&](int i) { ++projectionCount; return i; };
+      int a[] = {1, 2, 3, 4, 5};
+      auto ret = std::ranges::replace(a, 1, 2, proj);
+      assert(ret == a + 5);
+      assert(projectionCount == 5);
+    }
+  }
+
+  return true;
+}
+
+int main(int, char**) {
+  test();
+  static_assert(test());
+
+  return 0;
+}

module/jni/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/ranges.replace_if.pass.cpp

@@ -0,0 +1,188 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// template<input_iterator I, sentinel_for<I> S, class T, class Proj = identity,
+//          indirect_unary_predicate<projected<I, Proj>> Pred>
+//   requires indirectly_writable<I, const T&>
+//   constexpr I ranges::replace_if(I first, S last, Pred pred, const T& new_value, Proj proj = {});
+// template<input_range R, class T, class Proj = identity,
+//          indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+//   requires indirectly_writable<iterator_t<R>, const T&>
+//   constexpr borrowed_iterator_t<R>
+//     ranges::replace_if(R&& r, Pred pred, const T& new_value, Proj proj = {});
+
+#include <algorithm>
+#include <array>
+#include <cassert>
+#include <ranges>
+
+#include "almost_satisfies_types.h"
+#include "boolean_testable.h"
+#include "test_iterators.h"
+
+struct FalsePredicate {
+  bool operator()(auto&&) { return false; }
+};
+
+template <class Iter, class Sent = sentinel_wrapper<Iter>>
+concept HasReplaceIt = requires(Iter iter, Sent sent) { std::ranges::replace_if(iter, sent, FalsePredicate{}, 0); };
+
+static_assert(HasReplaceIt<int*>);
+static_assert(!HasReplaceIt<InputIteratorNotDerivedFrom>);
+static_assert(!HasReplaceIt<InputIteratorNotIndirectlyReadable>);
+static_assert(!HasReplaceIt<InputIteratorNotInputOrOutputIterator>);
+static_assert(!HasReplaceIt<int*, SentinelForNotSemiregular>);
+static_assert(!HasReplaceIt<int*, SentinelForNotWeaklyEqualityComparableWith>);
+static_assert(!HasReplaceIt<int**>); // not indirectly_writable
+static_assert(!HasReplaceIt<IndirectBinaryPredicateNotIndirectlyReadable>);
+
+template <class Range>
+concept HasReplaceR = requires(Range range) { std::ranges::replace_if(range, FalsePredicate{}, 0); };
+
+static_assert(HasReplaceR<UncheckedRange<int*>>);
+static_assert(!HasReplaceR<InputRangeNotDerivedFrom>);
+static_assert(!HasReplaceR<InputRangeNotIndirectlyReadable>);
+static_assert(!HasReplaceR<InputRangeNotInputOrOutputIterator>);
+static_assert(!HasReplaceR<InputRangeNotSentinelSemiregular>);
+static_assert(!HasReplaceR<InputRangeNotSentinelEqualityComparableWith>);
+static_assert(!HasReplaceR<UncheckedRange<int**>>); // not indirectly_writable
+static_assert(!HasReplaceR<InputRangeIndirectBinaryPredicateNotIndirectlyReadable>);
+
+template <class Iter, class Sent, int N, class Pred>
+constexpr void test(std::array<int, N> a_, Pred pred, int val, std::array<int, N> expected) {
+  {
+    auto a = a_;
+    std::same_as<Iter> auto ret = std::ranges::replace_if(Iter(a.data()), Sent(Iter(a.data() + N)),
+                                                          pred,
+                                                          val);
+    assert(base(ret) == a.data() + N);
+    assert(a == expected);
+  }
+  {
+    auto a = a_;
+    auto range = std::ranges::subrange(Iter(a.data()), Sent(Iter(a.data() + N)));
+    std::same_as<Iter> auto ret = std::ranges::replace_if(range, pred, val);
+    assert(base(ret) == a.data() + N);
+    assert(a == expected);
+  }
+}
+
+template <class Iter, class Sent = Iter>
+constexpr void test_iterators() {
+  // simple test
+  test<Iter, Sent, 4>({1, 2, 3, 4}, [](int i) { return i < 3; }, 23, {23, 23, 3, 4});
+  // no match
+  test<Iter, Sent, 4>({1, 2, 3, 4}, [](int i) { return i < 0; }, 23, {1, 2, 3, 4});
+  // all match
+  test<Iter, Sent, 4>({1, 2, 3, 4}, [](int i) { return i > 0; }, 23, {23, 23, 23, 23});
+  // empty range
+  test<Iter, Sent, 0>({}, [](int i) { return i > 0; }, 23, {});
+  // single element range
+  test<Iter, Sent, 1>({1}, [](int i) { return i > 0; }, 2, {2});
+}
+
+constexpr bool test() {
+  test_iterators<cpp17_input_iterator<int*>, sentinel_wrapper<cpp17_input_iterator<int*>>>();
+  test_iterators<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_input_iterator<int*>>>();
+  test_iterators<forward_iterator<int*>>();
+  test_iterators<bidirectional_iterator<int*>>();
+  test_iterators<random_access_iterator<int*>>();
+  test_iterators<contiguous_iterator<int*>>();
+  test_iterators<int*>();
+
+  { // check that the projection is used
+    struct S {
+      constexpr S(int i_) : i(i_) {}
+      int i;
+    };
+    {
+      S a[] = {1, 2, 3, 4};
+      std::ranges::replace_if(a, a + 4, [](int i) { return i == 3; }, S{0}, &S::i);
+    }
+    {
+      S a[] = {1, 2, 3, 4};
+      std::ranges::replace_if(a, [](int i) { return i == 3; }, S{0}, &S::i);
+    }
+  }
+
+  { // check that std::invoke is used
+    struct S {
+      constexpr S(int i_) : i(i_) {}
+      constexpr bool check() const { return false; }
+      constexpr const S& identity() const { return *this; }
+      int i;
+    };
+    {
+      S a[] = {1, 2, 3, 4};
+      auto ret = std::ranges::replace_if(std::begin(a), std::end(a), &S::check, S{2}, &S::identity);
+      assert(ret == std::end(a));
+    }
+    {
+      S a[] = {1, 2, 3, 4};
+      auto ret = std::ranges::replace_if(a, &S::check, S{2}, &S::identity);
+      assert(ret == std::end(a));
+    }
+  }
+
+  { // check that the implicit conversion to bool works
+    {
+      int a[] = {1, 2, 2, 4};
+      auto ret = std::ranges::replace_if(std::begin(a), std::end(a), [](int) { return BooleanTestable{false}; }, 2);
+      assert(ret == std::end(a));
+    }
+    {
+      int a[] = {1, 2, 2, 4};
+      auto ret = std::ranges::replace_if(a, [](int) { return BooleanTestable{false}; }, 2);
+      assert(ret == std::end(a));
+    }
+  }
+
+  { // check that std::ranges::dangling is returned
+    [[maybe_unused]] std::same_as<std::ranges::dangling> decltype(auto) ret =
+        std::ranges::replace_if(std::array {1, 2, 3, 4}, [](int) { return false; }, 1);
+  }
+
+  { // check that the complexity requirements are met
+    {
+      int predicateCount = 0;
+      auto pred = [&](int) { ++predicateCount; return false; };
+      auto projectionCount = 0;
+      auto proj = [&](int i) { ++projectionCount; return i; };
+      int a[] = {1, 2, 3, 4, 5};
+      auto ret = std::ranges::replace_if(a, a + 5, pred, 1, proj);
+      assert(ret == a + 5);
+      assert(predicateCount == 5);
+      assert(projectionCount == 5);
+    }
+    {
+      int predicateCount = 0;
+      auto pred = [&](int) { ++predicateCount; return false; };
+      auto projectionCount = 0;
+      auto proj = [&](int i) { ++projectionCount; return i; };
+      int a[] = {1, 2, 3, 4, 5};
+      auto ret = std::ranges::replace_if(a, pred, 1, proj);
+      assert(ret == a + 5);
+      assert(predicateCount == 5);
+      assert(projectionCount == 5);
+    }
+  }
+
+  return true;
+}
+
+int main(int, char**) {
+  test();
+  static_assert(test());
+
+  return 0;
+}

module/jni/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/ranges_replace_copy.pass.cpp

@@ -0,0 +1,255 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// template<input_iterator I, sentinel_for<I> S, class T1, class T2,
+//          output_iterator<const T2&> O, class Proj = identity>
+//   requires indirectly_copyable<I, O> &&
+//            indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T1*>
+//   constexpr replace_copy_result<I, O>
+//     replace_copy(I first, S last, O result, const T1& old_value, const T2& new_value,
+//                  Proj proj = {});                                                                // Since C++20
+//
+// template<input_range R, class T1, class T2, output_iterator<const T2&> O,
+//          class Proj = identity>
+//   requires indirectly_copyable<iterator_t<R>, O> &&
+//            indirect_binary_predicate<ranges::equal_to,
+//                                      projected<iterator_t<R>, Proj>, const T1*>
+//   constexpr replace_copy_result<borrowed_iterator_t<R>, O>
+//     replace_copy(R&& r, O result, const T1& old_value, const T2& new_value,
+//                  Proj proj = {});                                                                // Since C++20
+
+#include <algorithm>
+#include <array>
+#include <concepts>
+#include <functional>
+#include <ranges>
+#include <utility>
+
+#include "almost_satisfies_types.h"
+#include "counting_projection.h"
+#include "test_iterators.h"
+
+template <class Iter, class Sent = sentinel_wrapper<Iter>, class OutIter = int*>
+concept HasReplaceCopyIter =
+  requires(Iter&& first, Sent&& last, OutIter&& result) {
+    std::ranges::replace_copy(
+        std::forward<Iter>(first), std::forward<Sent>(last), std::forward<OutIter>(result), 0, 0);
+};
+
+static_assert(HasReplaceCopyIter<int*>);
+
+// !input_iterator<I>
+static_assert(!HasReplaceCopyIter<InputIteratorNotDerivedFrom>);
+static_assert(!HasReplaceCopyIter<InputIteratorNotIndirectlyReadable>);
+static_assert(!HasReplaceCopyIter<InputIteratorNotInputOrOutputIterator>);
+
+// !sentinel_for<S, I>
+static_assert(!HasReplaceCopyIter<int*, SentinelForNotSemiregular>);
+static_assert(!HasReplaceCopyIter<int*, SentinelForNotWeaklyEqualityComparableWith>);
+
+// !output_iterator<O, const T2&>
+static_assert(!HasReplaceCopyIter<int*, int*, OutputIteratorNotIndirectlyWritable>);
+static_assert(!HasReplaceCopyIter<int*, int*, OutputIteratorNotInputOrOutputIterator>);
+
+// !indirectly_copyable<I, O>
+static_assert(!HasReplaceCopyIter<int*, int*, int**>);
+
+// !indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T1*>
+static_assert(!HasReplaceCopyIter<IndirectBinaryPredicateNotIndirectlyReadable>);
+
+template <class Range, class OutIter = int*>
+concept HasReplaceCopyRange = requires(Range&& range, OutIter&& result) {
+  std::ranges::replace_copy(std::forward<Range>(range), std::forward<OutIter>(result), 0, 0);
+};
+
+template <class T>
+using R = UncheckedRange<T>;
+
+static_assert(HasReplaceCopyRange<R<int*>>);
+
+// !input_range<R>
+static_assert(!HasReplaceCopyRange<InputRangeNotDerivedFrom>);
+static_assert(!HasReplaceCopyRange<InputRangeNotIndirectlyReadable>);
+static_assert(!HasReplaceCopyRange<InputRangeNotInputOrOutputIterator>);
+static_assert(!HasReplaceCopyRange<InputRangeNotSentinelSemiregular>);
+static_assert(!HasReplaceCopyRange<InputRangeNotSentinelEqualityComparableWith>);
+
+// !output_iterator<O, const T2&>
+static_assert(!HasReplaceCopyRange<R<int*>, OutputIteratorNotIndirectlyWritable>);
+static_assert(!HasReplaceCopyRange<R<int*>, OutputIteratorNotInputOrOutputIterator>);
+
+// !indirectly_copyable<iterator_t<R>, O>
+static_assert(!HasReplaceCopyRange<R<int*>, R<int**>>);
+
+// !indirect_binary_predicate<ranges::equal_to, projected<iterator_t<T>, Proj>, const T1*>
+static_assert(!HasReplaceCopyRange<R<IndirectBinaryPredicateNotIndirectlyReadable>>);
+
+template <int N>
+struct Data {
+  std::array<int, N> input;
+  int old_value;
+  int new_value;
+  std::array<int, N> expected;
+};
+
+template <class InIter, class Sent, class OutIter, int N>
+constexpr void test(Data<N> d) {
+  { // iterator overload
+    std::array<int, N> output;
+
+    auto first  = InIter(d.input.data());
+    auto last   = Sent(InIter(d.input.data() + d.input.size()));
+    auto result = OutIter(output.data());
+
+    std::same_as<std::ranges::replace_copy_result<InIter, OutIter>> decltype(auto) ret =
+        std::ranges::replace_copy(std::move(first), std::move(last), std::move(result), d.old_value, d.new_value);
+    assert(base(ret.in) == d.input.data() + d.input.size());
+    assert(base(ret.out) == output.data() + output.size());
+    assert(d.expected == output);
+  }
+
+  { // range overload
+    std::array<int, N> output;
+
+    auto range  = std::ranges::subrange(InIter(d.input.data()), Sent(InIter(d.input.data() + d.input.size())));
+    auto result = OutIter(output.data());
+
+    std::same_as<std::ranges::replace_copy_result<InIter, OutIter>> decltype(auto) ret =
+        std::ranges::replace_copy(range, result, d.old_value, d.new_value);
+    assert(base(ret.in) == d.input.data() + d.input.size());
+    assert(base(ret.out) == output.data() + output.size());
+    assert(d.expected == output);
+  }
+}
+
+template <class InIter, class Sent, class OutIter>
+constexpr void tests() {
+  // simple test
+  test<InIter, Sent, OutIter, 4>({.input = {1, 2, 3, 4}, .old_value = 2, .new_value = 5, .expected = {1, 5, 3, 4}});
+  // empty range
+  test<InIter, Sent, OutIter, 0>({.input = {}, .old_value = 2, .new_value = 5, .expected = {}});
+  // all elements match
+  test<InIter, Sent, OutIter, 4>({.input = {1, 1, 1, 1}, .old_value = 1, .new_value = 2, .expected = {2, 2, 2, 2}});
+  // no element matches
+  test<InIter, Sent, OutIter, 4>({.input = {1, 1, 1, 1}, .old_value = 2, .new_value = 3, .expected = {1, 1, 1, 1}});
+  // old_value and new_value are identical - match
+  test<InIter, Sent, OutIter, 4>({.input = {1, 1, 1, 1}, .old_value = 1, .new_value = 1, .expected = {1, 1, 1, 1}});
+  // old_value and new_value are identical - no match
+  test<InIter, Sent, OutIter, 4>({.input = {1, 1, 1, 1}, .old_value = 2, .new_value = 2, .expected = {1, 1, 1, 1}});
+  // more elements
+  test<InIter, Sent, OutIter, 7>(
+      {.input = {1, 2, 3, 4, 5, 6, 7}, .old_value = 2, .new_value = 3, .expected = {1, 3, 3, 4, 5, 6, 7}});
+  // single element - match
+  test<InIter, Sent, OutIter, 1>({.input = {1}, .old_value = 1, .new_value = 5, .expected = {5}});
+  // single element - no match
+  test<InIter, Sent, OutIter, 1>({.input = {2}, .old_value = 1, .new_value = 5, .expected = {2}});
+}
+
+template <class InIter, class Sent>
+constexpr void test_output_iterators() {
+  tests<InIter, Sent, cpp17_output_iterator<int*>>();
+  tests<InIter, Sent, forward_iterator<int*>>();
+  tests<InIter, Sent, bidirectional_iterator<int*>>();
+  tests<InIter, Sent, random_access_iterator<int*>>();
+  tests<InIter, Sent, contiguous_iterator<int*>>();
+  tests<InIter, Sent, int*>();
+}
+
+template <class InIter>
+constexpr void test_sentinels() {
+  test_output_iterators<InIter, InIter>();
+  test_output_iterators<InIter, sentinel_wrapper<InIter>>();
+  test_output_iterators<InIter, sized_sentinel<InIter>>();
+}
+
+constexpr bool test() {
+  test_output_iterators<cpp17_input_iterator<int*>, sentinel_wrapper<cpp17_input_iterator<int*>>>();
+  test_output_iterators<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_input_iterator<int*>>>();
+  test_sentinels<forward_iterator<int*>>();
+  test_sentinels<bidirectional_iterator<int*>>();
+  test_sentinels<random_access_iterator<int*>>();
+  test_sentinels<contiguous_iterator<int*>>();
+  test_sentinels<int*>();
+  test_sentinels<const int*>();
+
+  { // check that a custom projection works
+    struct S {
+      int i;
+    };
+
+    { // iterator overload
+      S a[] = {{1}, {2}, {3}, {4}};
+      S b[4];
+      auto ret = std::ranges::replace_copy(std::begin(a), std::end(a), std::begin(b), 1, S{2}, &S::i);
+      assert(ret.in == std::end(a));
+      assert(ret.out == std::end(b));
+    }
+
+    { // range overload
+      S a[] = {{1}, {2}, {3}, {4}};
+      S b[4];
+      auto ret = std::ranges::replace_copy(a, std::begin(b), 1, S{2}, &S::i);
+      assert(ret.in == std::end(a));
+      assert(ret.out == std::end(b));
+    }
+  }
+
+  {   // Complexity: exactly `last - first` applications of the corresponding predicate and any projection.
+    { // iterator overload
+      int proj_count = 0;
+      int a[] = {1, 2, 3, 4};
+      int b[4];
+      std::ranges::replace_copy(
+          std::begin(a), std::end(a), std::begin(b), 0, 0, counting_projection(proj_count));
+      assert(proj_count == 4);
+    }
+
+    { // range overload
+      int proj_count = 0;
+      int a[] = {1, 2, 3, 4};
+      int b[4];
+      std::ranges::replace_copy(a, std::begin(b), 0, 0, counting_projection(proj_count));
+      assert(proj_count == 4);
+    }
+  }
+
+  { // using different types for the old and new values works
+    struct S {
+      constexpr operator int() const { return 0; }
+      constexpr bool operator==(const S&) const = default;
+      constexpr bool operator==(int i) const { return i == 0; }
+    };
+    struct T {
+      constexpr operator int() const { return 1; }
+    };
+    {
+      int a[] = {0, 1, 2, 3};
+      int b[4];
+      std::ranges::replace_copy(std::begin(a), std::end(a), std::begin(b), S{}, T{});
+      assert(std::ranges::equal(b, std::array{1, 1, 2, 3}));
+    }
+    {
+      int a[] = {0, 1, 2, 3};
+      int b[4];
+      std::ranges::replace_copy(a, std::begin(b), S{}, T{});
+      assert(std::ranges::equal(b, std::array{1, 1, 2, 3}));
+    }
+  }
+
+  return true;
+}
+
+int main(int, char**) {
+  test();
+  static_assert(test());
+
+  return 0;
+}

module/jni/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/ranges_replace_copy_if.pass.cpp

@@ -0,0 +1,265 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// <algorithm>
+
+// template<input_iterator I, sentinel_for<I> S, class T, output_iterator<const T&> O,
+//          class Proj = identity, indirect_unary_predicate<projected<I, Proj>> Pred>
+//   requires indirectly_copyable<I, O>
+//   constexpr replace_copy_if_result<I, O>
+//     replace_copy_if(I first, S last, O result, Pred pred, const T& new_value,
+//                     Proj proj = {});                                                             // Since C++20
+//
+// template<input_range R, class T, output_iterator<const T&> O, class Proj = identity,
+//          indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+//   requires indirectly_copyable<iterator_t<R>, O>
+//   constexpr replace_copy_if_result<borrowed_iterator_t<R>, O>
+//     replace_copy_if(R&& r, O result, Pred pred, const T& new_value,
+//                     Proj proj = {});                                                             // Since C++20
+
+#include <algorithm>
+#include <array>
+#include <concepts>
+#include <functional>
+#include <ranges>
+#include <utility>
+
+#include "almost_satisfies_types.h"
+#include "counting_predicates.h"
+#include "counting_projection.h"
+#include "test_iterators.h"
+
+struct FalsePredicate {
+  constexpr bool operator()(int) { return false; }
+};
+
+template <class Iter, class Sent = sentinel_wrapper<Iter>, class OutIter = int*>
+concept HasReplaceCopyIfIter = requires(Iter&& first, Sent&& last, OutIter&& result) {
+  std::ranges::replace_copy_if(
+      std::forward<Iter>(first), std::forward<Sent>(last), std::forward<OutIter>(result), FalsePredicate{}, 0);
+};
+
+static_assert(HasReplaceCopyIfIter<int*>);
+
+// !input_iterator<I>
+static_assert(!HasReplaceCopyIfIter<InputIteratorNotDerivedFrom>);
+static_assert(!HasReplaceCopyIfIter<InputIteratorNotIndirectlyReadable>);
+static_assert(!HasReplaceCopyIfIter<InputIteratorNotInputOrOutputIterator>);
+
+// !sentinel_for<S, I>
+static_assert(!HasReplaceCopyIfIter<int*, SentinelForNotSemiregular>);
+static_assert(!HasReplaceCopyIfIter<int*, SentinelForNotWeaklyEqualityComparableWith>);
+
+// !output_iterator<O, const T2&>
+static_assert(!HasReplaceCopyIfIter<int*, int*, OutputIteratorNotIndirectlyWritable>);
+static_assert(!HasReplaceCopyIfIter<int*, int*, OutputIteratorNotInputOrOutputIterator>);
+
+// !indirect_unary_predicate<Pred, projected<I, Proj>> Pred>
+static_assert(!HasReplaceCopyIfIter<IndirectUnaryPredicateNotCopyConstructible>);
+static_assert(!HasReplaceCopyIfIter<IndirectUnaryPredicateNotPredicate>);
+
+// !indirectly_copyable<I, O>
+static_assert(!HasReplaceCopyIfIter<int*, int*, int**>);
+
+template <class Range, class OutIter = int*>
+concept HasReplaceCopyIfRange = requires(Range&& range, OutIter&& result) {
+  std::ranges::replace_copy_if(std::forward<Range>(range), std::forward<OutIter>(result), FalsePredicate{}, 0);
+};
+
+template <class T>
+using R = UncheckedRange<T>;
+
+static_assert(HasReplaceCopyIfRange<R<int*>>);
+
+// !input_range<R>
+static_assert(!HasReplaceCopyIfRange<InputRangeNotDerivedFrom>);
+static_assert(!HasReplaceCopyIfRange<InputRangeNotIndirectlyReadable>);
+static_assert(!HasReplaceCopyIfRange<InputRangeNotInputOrOutputIterator>);
+static_assert(!HasReplaceCopyIfRange<InputRangeNotSentinelSemiregular>);
+static_assert(!HasReplaceCopyIfRange<InputRangeNotSentinelEqualityComparableWith>);
+
+// !output_iterator<O, const T2&>
+static_assert(!HasReplaceCopyIfRange<R<int*>, OutputIteratorNotIndirectlyWritable>);
+static_assert(!HasReplaceCopyIfRange<R<int*>, OutputIteratorNotInputOrOutputIterator>);
+
+// !indirect_unary_predicate<Pred, projected<iterator_t<R>, Proj>> Pred>
+static_assert(!HasReplaceCopyIfRange<R<IndirectUnaryPredicateNotPredicate>>);
+
+// !indirectly_copyable<iterator_t<R>, O>
+static_assert(!HasReplaceCopyIfRange<R<int*>, int**>);
+
+template <int N>
+struct Data {
+  std::array<int, N> input;
+  int cutoff;
+  int new_value;
+  std::array<int, N> expected;
+};
+
+template <class InIter, class Sent, class OutIter, int N>
+constexpr void test(Data<N> d) {
+  { // iterator overload
+    std::array<int, N> output;
+
+    auto first  = InIter(d.input.data());
+    auto last   = Sent(InIter(d.input.data() + d.input.size()));
+    auto result = OutIter(output.data());
+
+    auto pred = [&](int i) { return i < d.cutoff; };
+
+    std::same_as<std::ranges::replace_copy_if_result<InIter, OutIter>> decltype(auto) ret =
+        std::ranges::replace_copy_if(std::move(first), std::move(last), std::move(result), pred, d.new_value);
+    assert(base(ret.in) == d.input.data() + d.input.size());
+    assert(base(ret.out) == output.data() + output.size());
+    assert(d.expected == output);
+  }
+
+  { // range overload
+    std::array<int, N> output;
+
+    auto range  = std::ranges::subrange(InIter(d.input.data()), Sent(InIter(d.input.data() + d.input.size())));
+    auto result = OutIter(output.data());
+
+    auto pred = [&](int i) { return i < d.cutoff; };
+
+    std::same_as<std::ranges::replace_copy_if_result<InIter, OutIter>> decltype(auto) ret =
+        std::ranges::replace_copy_if(range, result, pred, d.new_value);
+    assert(base(ret.in) == d.input.data() + d.input.size());
+    assert(base(ret.out) == output.data() + output.size());
+    assert(d.expected == output);
+  }
+}
+
+template <class InIter, class Sent, class OutIter>
+constexpr void tests() {
+  // simple test
+  test<InIter, Sent, OutIter, 4>({.input = {1, 2, 3, 4}, .cutoff = 2, .new_value = 5, .expected = {5, 2, 3, 4}});
+  // empty range
+  test<InIter, Sent, OutIter, 0>({.input = {}, .cutoff = 2, .new_value = 5, .expected = {}});
+  // all elements match
+  test<InIter, Sent, OutIter, 4>({.input = {1, 1, 1, 1}, .cutoff = 2, .new_value = 2, .expected = {2, 2, 2, 2}});
+  // no element matches
+  test<InIter, Sent, OutIter, 4>({.input = {1, 1, 1, 1}, .cutoff = 1, .new_value = 3, .expected = {1, 1, 1, 1}});
+  // more elements
+  test<InIter, Sent, OutIter, 7>(
+      {.input = {1, 2, 3, 4, 5, 6, 7}, .cutoff = 3, .new_value = 3, .expected = {3, 3, 3, 4, 5, 6, 7}});
+  // single element - match
+  test<InIter, Sent, OutIter, 1>({.input = {1}, .cutoff = 2, .new_value = 5, .expected = {5}});
+  // single element - no match
+  test<InIter, Sent, OutIter, 1>({.input = {2}, .cutoff = 2, .new_value = 5, .expected = {2}});
+}
+
+template <class InIter, class Sent>
+constexpr void test_output_iterators() {
+  tests<InIter, Sent, cpp17_output_iterator<int*>>();
+  tests<InIter, Sent, forward_iterator<int*>>();
+  tests<InIter, Sent, bidirectional_iterator<int*>>();
+  tests<InIter, Sent, random_access_iterator<int*>>();
+  tests<InIter, Sent, contiguous_iterator<int*>>();
+  tests<InIter, Sent, int*>();
+}
+
+template <class InIter>
+constexpr void test_sentinels() {
+  test_output_iterators<InIter, InIter>();
+  test_output_iterators<InIter, sentinel_wrapper<InIter>>();
+  test_output_iterators<InIter, sized_sentinel<InIter>>();
+}
+
+constexpr bool test() {
+  test_output_iterators<cpp17_input_iterator<int*>, sentinel_wrapper<cpp17_input_iterator<int*>>>();
+  test_output_iterators<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_input_iterator<int*>>>();
+  test_sentinels<forward_iterator<int*>>();
+  test_sentinels<bidirectional_iterator<int*>>();
+  test_sentinels<random_access_iterator<int*>>();
+  test_sentinels<contiguous_iterator<int*>>();
+  test_sentinels<int*>();
+  test_sentinels<const int*>();
+
+  { // check that a custom projection works
+    struct S {
+      int i;
+    };
+
+    { // iterator overload
+      S a[] = {{1}, {2}, {3}, {4}};
+      S b[4];
+      auto ret = std::ranges::replace_copy_if(std::begin(a), std::end(a), std::begin(b), FalsePredicate{}, S{2}, &S::i);
+      assert(ret.in == std::end(a));
+      assert(ret.out == std::end(b));
+      assert(std::ranges::equal(a, b, {}, &S::i, &S::i));
+    }
+
+    { // range overload
+      S a[] = {{1}, {2}, {3}, {4}};
+      S b[4];
+      auto ret = std::ranges::replace_copy_if(a, std::begin(b), FalsePredicate{}, S{2}, &S::i);
+      assert(ret.in == std::end(a));
+      assert(ret.out == std::end(b));
+      assert(std::ranges::equal(a, b, {}, &S::i, &S::i));
+    }
+  }
+
+  {   // Complexity: exactly `last - first` applications of the corresponding predicate and any projection.
+    { // iterator overload
+      int pred_count = 0;
+      int proj_count = 0;
+      int a[] = {1, 2, 3, 4};
+      int b[4];
+
+      std::ranges::replace_copy_if(
+          std::begin(a), std::end(a), std::begin(b),
+          counting_predicate(FalsePredicate{}, pred_count), 0, counting_projection(proj_count));
+      assert(pred_count == 4);
+      assert(proj_count == 4);
+    }
+
+    { // range overload
+      int pred_count = 0;
+      int proj_count = 0;
+      int a[] = {1, 2, 3, 4};
+      int b[4];
+
+      std::ranges::replace_copy_if(a, std::begin(b),
+          counting_predicate(FalsePredicate{}, pred_count), 0, counting_projection(proj_count));
+      assert(pred_count == 4);
+      assert(proj_count == 4);
+    }
+  }
+
+  { // using different types for the old and new values works
+    struct S {
+      constexpr operator int() const { return 1; }
+    };
+    {
+      int a[] = {0, 0, 2, 3};
+      int b[4];
+      std::ranges::replace_copy_if(std::begin(a), std::end(a), std::begin(b), [](int i) { return i < 2; }, S{});
+      assert(std::ranges::equal(b, std::array{1, 1, 2, 3}));
+    }
+
+    {
+      int a[] = {0, 0, 2, 3};
+      int b[4];
+      std::ranges::replace_copy_if(a, std::begin(b), [](int i) { return i < 2; }, S{});
+      assert(std::ranges::equal(b, std::array{1, 1, 2, 3}));
+    }
+  }
+
+  return true;
+}
+
+int main(int, char**) {
+  test();
+  static_assert(test());
+
+  return 0;
+}

module/jni/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/replace.pass.cpp

@@ -0,0 +1,62 @@
+//===----------------------------------------------------------------------===//
+//
+// 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>
+
+// template<ForwardIterator Iter, class T>
+//   requires OutputIterator<Iter, Iter::reference>
+//         && OutputIterator<Iter, const T&>
+//         && HasEqualTo<Iter::value_type, T>
+//   constexpr void      // constexpr after C++17
+//   replace(Iter first, Iter last, const T& old_value, const T& new_value);
+
+#include <algorithm>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_iterators.h"
+
+
+#if TEST_STD_VER > 17
+TEST_CONSTEXPR bool test_constexpr() {
+          int ia[]       = {0, 1, 2, 3, 4};
+    const int expected[] = {0, 1, 5, 3, 4};
+
+    std::replace(std::begin(ia), std::end(ia), 2, 5);
+    return std::equal(std::begin(ia), std::end(ia), std::begin(expected), std::end(expected))
+        ;
+    }
+#endif
+
+template <class Iter>
+void
+test()
+{
+    int ia[] = {0, 1, 2, 3, 4};
+    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
+    std::replace(Iter(ia), Iter(ia+sa), 2, 5);
+    assert(ia[0] == 0);
+    assert(ia[1] == 1);
+    assert(ia[2] == 5);
+    assert(ia[3] == 3);
+    assert(ia[4] == 4);
+}
+
+int main(int, char**)
+{
+    test<forward_iterator<int*> >();
+    test<bidirectional_iterator<int*> >();
+    test<random_access_iterator<int*> >();
+    test<int*>();
+
+#if TEST_STD_VER > 17
+    static_assert(test_constexpr());
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/replace_copy.pass.cpp

@@ -0,0 +1,94 @@
+//===----------------------------------------------------------------------===//
+//
+// 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>
+
+// template<InputIterator InIter, typename OutIter, class T>
+//   requires OutputIterator<OutIter, InIter::reference>
+//         && OutputIterator<OutIter, const T&>
+//         && HasEqualTo<InIter::value_type, T>
+//   constexpr OutIter      // constexpr after C++17
+//   replace_copy(InIter first, InIter last, OutIter result, const T& old_value,
+//                                                           const T& new_value);
+
+#include <algorithm>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_iterators.h"
+
+
+#if TEST_STD_VER > 17
+TEST_CONSTEXPR bool test_constexpr() {
+    int ia[] = {0, 1, 2, 3, 4};
+    int ib[] = {0, 0, 0, 0, 0, 0}; // one bigger
+    const int expected[] = {0, 1, 5, 3, 4};
+
+    auto it = std::replace_copy(std::begin(ia), std::end(ia), std::begin(ib), 2, 5);
+
+    return it == (std::begin(ib) + std::size(ia))
+        && *it == 0 // don't overwrite the last value in the output array
+        && std::equal(std::begin(ib), it, std::begin(expected), std::end(expected))
+        ;
+    }
+#endif
+
+template <class InIter, class OutIter>
+void
+test()
+{
+    int ia[] = {0, 1, 2, 3, 4};
+    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
+    int ib[sa] = {0};
+    OutIter r = std::replace_copy(InIter(ia), InIter(ia+sa), OutIter(ib), 2, 5);
+    assert(base(r) == ib + sa);
+    assert(ib[0] == 0);
+    assert(ib[1] == 1);
+    assert(ib[2] == 5);
+    assert(ib[3] == 3);
+    assert(ib[4] == 4);
+}
+
+int main(int, char**)
+{
+    test<cpp17_input_iterator<const int*>, cpp17_output_iterator<int*> >();
+    test<cpp17_input_iterator<const int*>, forward_iterator<int*> >();
+    test<cpp17_input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<cpp17_input_iterator<const int*>, random_access_iterator<int*> >();
+    test<cpp17_input_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, cpp17_output_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, cpp17_output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, cpp17_output_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, int*>();
+
+    test<const int*, cpp17_output_iterator<int*> >();
+    test<const int*, forward_iterator<int*> >();
+    test<const int*, bidirectional_iterator<int*> >();
+    test<const int*, random_access_iterator<int*> >();
+    test<const int*, int*>();
+
+#if TEST_STD_VER > 17
+    static_assert(test_constexpr());
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/replace_copy_if.pass.cpp

@@ -0,0 +1,98 @@
+//===----------------------------------------------------------------------===//
+//
+// 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>
+
+// template<InputIterator InIter, typename OutIter,
+//          Predicate<auto, InIter::value_type> Pred, class T>
+//   requires OutputIterator<OutIter, InIter::reference>
+//         && OutputIterator<OutIter, const T&>
+//         && CopyConstructible<Pred>
+//   constexpr OutIter      // constexpr after C++17
+//   replace_copy_if(InIter first, InIter last, OutIter result, Pred pred, const T& new_value);
+
+#include <algorithm>
+#include <functional>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_iterators.h"
+
+TEST_CONSTEXPR bool equalToTwo(int v) { return v == 2; }
+
+
+#if TEST_STD_VER > 17
+TEST_CONSTEXPR bool test_constexpr() {
+    int ia[] = {0, 1, 2, 3, 4};
+    int ib[] = {0, 0, 0, 0, 0, 0}; // one bigger
+    const int expected[] = {0, 1, 5, 3, 4};
+
+    auto it = std::replace_copy_if(std::begin(ia), std::end(ia), std::begin(ib), equalToTwo, 5);
+
+    return it == (std::begin(ib) + std::size(ia))
+        && *it == 0 // don't overwrite the last value in the output array
+        && std::equal(std::begin(ib), it, std::begin(expected), std::end(expected))
+        ;
+    }
+#endif
+
+template <class InIter, class OutIter>
+void
+test()
+{
+    int ia[] = {0, 1, 2, 3, 4};
+    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
+    int ib[sa] = {0};
+    OutIter r = std::replace_copy_if(InIter(ia), InIter(ia+sa),
+                                     OutIter(ib), equalToTwo, 5);
+    assert(base(r) == ib + sa);
+    assert(ib[0] == 0);
+    assert(ib[1] == 1);
+    assert(ib[2] == 5);
+    assert(ib[3] == 3);
+    assert(ib[4] == 4);
+}
+
+int main(int, char**)
+{
+    test<cpp17_input_iterator<const int*>, cpp17_output_iterator<int*> >();
+    test<cpp17_input_iterator<const int*>, forward_iterator<int*> >();
+    test<cpp17_input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<cpp17_input_iterator<const int*>, random_access_iterator<int*> >();
+    test<cpp17_input_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, cpp17_output_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, cpp17_output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, cpp17_output_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, int*>();
+
+    test<const int*, cpp17_output_iterator<int*> >();
+    test<const int*, forward_iterator<int*> >();
+    test<const int*, bidirectional_iterator<int*> >();
+    test<const int*, random_access_iterator<int*> >();
+    test<const int*, int*>();
+
+#if TEST_STD_VER > 17
+    static_assert(test_constexpr());
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/replace_if.pass.cpp

@@ -0,0 +1,65 @@
+//===----------------------------------------------------------------------===//
+//
+// 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>
+
+// template<ForwardIterator Iter, Predicate<auto, Iter::value_type> Pred, class T>
+//   requires OutputIterator<Iter, Iter::reference>
+//         && OutputIterator<Iter, const T&>
+//         && CopyConstructible<Pred>
+//   constexpr void      // constexpr after C++17
+//   replace_if(Iter first, Iter last, Pred pred, const T& new_value);
+
+#include <algorithm>
+#include <functional>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_iterators.h"
+
+TEST_CONSTEXPR bool equalToTwo(int v) { return v == 2; }
+
+#if TEST_STD_VER > 17
+TEST_CONSTEXPR bool test_constexpr() {
+          int ia[]       = {0, 1, 2, 3, 4};
+    const int expected[] = {0, 1, 5, 3, 4};
+
+    std::replace_if(std::begin(ia), std::end(ia), equalToTwo, 5);
+    return std::equal(std::begin(ia), std::end(ia), std::begin(expected), std::end(expected))
+        ;
+    }
+#endif
+
+
+template <class Iter>
+void
+test()
+{
+    int ia[] = {0, 1, 2, 3, 4};
+    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
+    std::replace_if(Iter(ia), Iter(ia+sa), equalToTwo, 5);
+    assert(ia[0] == 0);
+    assert(ia[1] == 1);
+    assert(ia[2] == 5);
+    assert(ia[3] == 3);
+    assert(ia[4] == 4);
+}
+
+int main(int, char**)
+{
+    test<forward_iterator<int*> >();
+    test<bidirectional_iterator<int*> >();
+    test<random_access_iterator<int*> >();
+    test<int*>();
+
+#if TEST_STD_VER > 17
+    static_assert(test_constexpr());
+#endif
+
+  return 0;
+}