Initial commit

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

@@ -0,0 +1,145 @@
+//===----------------------------------------------------------------------===//
+//
+// 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<bidirectional_iterator I, sentinel_for<I> S>
+//   requires permutable<I>
+//   constexpr I ranges::reverse(I first, S last);
+// template<bidirectional_range R>
+//   requires permutable<iterator_t<R>>
+//   constexpr borrowed_iterator_t<R> ranges::reverse(R&& r);
+
+#include <algorithm>
+#include <array>
+#include <concepts>
+#include <ranges>
+
+#include "almost_satisfies_types.h"
+#include "MoveOnly.h"
+#include "test_iterators.h"
+
+template <class Iter, class Sent = sentinel_wrapper<Iter>>
+concept HasReverseIt = requires (Iter first, Sent last) { std::ranges::reverse(first, last); };
+
+static_assert(HasReverseIt<int*>);
+static_assert(!HasReverseIt<BidirectionalIteratorNotDerivedFrom>);
+static_assert(!HasReverseIt<BidirectionalIteratorNotDecrementable>);
+static_assert(!HasReverseIt<PermutableNotForwardIterator>);
+static_assert(!HasReverseIt<PermutableNotSwappable>);
+
+
+template <class Range>
+concept HasReverseR = requires (Range range) { std::ranges::reverse(range); };
+
+static_assert(HasReverseR<UncheckedRange<int*>>);
+static_assert(!HasReverseR<BidirectionalRangeNotDerivedFrom>);
+static_assert(!HasReverseR<BidirectionalRangeNotDecrementable>);
+static_assert(!HasReverseR<PermutableRangeNotForwardIterator>);
+static_assert(!HasReverseR<PermutableRangeNotSwappable>);
+
+template <class Iter, class Sent, size_t N>
+constexpr void test(std::array<int, N> value, std::array<int, N> expected) {
+  {
+    auto val = value;
+    std::same_as<Iter> decltype(auto) ret = std::ranges::reverse(Iter(val.data()), Sent(Iter(val.data() + val.size())));
+    assert(val == expected);
+    assert(base(ret) == val.data() + val.size());
+  }
+  {
+    auto val = value;
+    auto range = std::ranges::subrange(Iter(val.data()), Sent(Iter(val.data() + val.size())));
+    std::same_as<Iter> decltype(auto) ret = std::ranges::reverse(range);
+    assert(val == expected);
+    assert(base(ret) == val.data() + val.size());
+  }
+}
+
+template <class Iter, class Sent = Iter>
+constexpr void test_iterators() {
+  // simple test
+  test<Iter, Sent, 4>({1, 2, 3, 4}, {4, 3, 2, 1});
+  // check that an odd number of elements works
+  test<Iter, Sent, 7>({1, 2, 3, 4, 5, 6, 7}, {7, 6, 5, 4, 3, 2, 1});
+  // check that an empty range works
+  test<Iter, Sent, 0>({}, {});
+  // check that a single element works
+  test<Iter, Sent, 1>({5}, {5});
+}
+
+struct SwapCounter {
+  int* counter;
+  constexpr SwapCounter(int* counter_) : counter(counter_) {}
+  friend constexpr void swap(SwapCounter& lhs, SwapCounter&) { ++*lhs.counter; }
+};
+
+constexpr bool test() {
+  test_iterators<bidirectional_iterator<int*>>();
+  test_iterators<bidirectional_iterator<int*>, sentinel_wrapper<bidirectional_iterator<int*>>>();
+  test_iterators<random_access_iterator<int*>>();
+  test_iterators<random_access_iterator<int*>, sentinel_wrapper<random_access_iterator<int*>>>();
+  test_iterators<contiguous_iterator<int*>>();
+  test_iterators<contiguous_iterator<int*>, sentinel_wrapper<contiguous_iterator<int*>>>();
+  test_iterators<int*>();
+
+  test_iterators<ProxyIterator<bidirectional_iterator<int*>>>();
+  test_iterators<ProxyIterator<random_access_iterator<int*>>>();
+  test_iterators<ProxyIterator<contiguous_iterator<int*>>>();
+
+  // check that std::ranges::dangling is returned
+  {
+    [[maybe_unused]] std::same_as<std::ranges::dangling> auto ret = std::ranges::reverse(std::array {1, 2, 3, 4});
+  }
+
+  {
+    {
+      int counter = 0;
+      SwapCounter a[] = {&counter, &counter, &counter, &counter};
+      std::ranges::reverse(a);
+      assert(counter == 2);
+    }
+    {
+      int counter = 0;
+      SwapCounter a[] = {&counter, &counter, &counter, &counter};
+      std::ranges::reverse(a, a + 4);
+      assert(counter == 2);
+    }
+  }
+
+  // Move only types work for ProxyIterator
+  {
+    {
+      MoveOnly a[] = {1, 2, 3};
+      ProxyRange proxyA{a};
+      std::ranges::reverse(proxyA.begin(), proxyA.end());
+      assert(a[0].get() == 3);
+      assert(a[1].get() == 2);
+      assert(a[2].get() == 1);
+    }
+    {
+      MoveOnly a[] = {1, 2, 3};
+      ProxyRange proxyA{a};
+      std::ranges::reverse(proxyA);
+      assert(a[0].get() == 3);
+      assert(a[1].get() == 2);
+      assert(a[2].get() == 1);
+    }
+  }
+
+  return true;
+}
+
+int main(int, char**) {
+  test();
+  static_assert(test());
+
+  return 0;
+}

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

@@ -0,0 +1,141 @@
+//===----------------------------------------------------------------------===//
+//
+// 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<bidirectional_iterator I, sentinel_for<I> S, weakly_incrementable O>
+//   requires indirectly_copyable<I, O>
+//   constexpr ranges::reverse_copy_result<I, O>
+//     ranges::reverse_copy(I first, S last, O result);
+// template<bidirectional_range R, weakly_incrementable O>
+//   requires indirectly_copyable<iterator_t<R>, O>
+//   constexpr ranges::reverse_copy_result<borrowed_iterator_t<R>, O>
+//     ranges::reverse_copy(R&& r, O result);
+
+// <algorithm>
+
+#include <algorithm>
+#include <array>
+#include <cassert>
+#include <ranges>
+
+#include "almost_satisfies_types.h"
+#include "test_iterators.h"
+
+template <class Iter, class Out = int*, class Sent = sentinel_wrapper<Iter>>
+concept HasReverseCopyIt = requires(Iter first, Sent last, Out out) { std::ranges::reverse_copy(first, last, out); };
+
+template <class Range, class Out = int*>
+concept HasReverseCopyR = requires(Range range, Out out) { std::ranges::reverse_copy(range, out); };
+
+static_assert(HasReverseCopyIt<int*>);
+static_assert(!HasReverseCopyIt<BidirectionalIteratorNotDerivedFrom>);
+static_assert(!HasReverseCopyIt<BidirectionalIteratorNotDecrementable>);
+static_assert(!HasReverseCopyIt<int*, SentinelForNotSemiregular>);
+static_assert(!HasReverseCopyIt<int*, SentinelForNotWeaklyEqualityComparableWith>);
+static_assert(!HasReverseCopyIt<int*, OutputIteratorNotIndirectlyWritable>);
+static_assert(!HasReverseCopyIt<int*, OutputIteratorNotInputOrOutputIterator>);
+
+static_assert(HasReverseCopyR<UncheckedRange<int*>>);
+static_assert(!HasReverseCopyR<BidirectionalRangeNotDerivedFrom>);
+static_assert(!HasReverseCopyR<BidirectionalRangeNotDecrementable>);
+static_assert(!HasReverseCopyR<UncheckedRange<int*, SentinelForNotSemiregular>>);
+static_assert(!HasReverseCopyR<UncheckedRange<int*>, OutputIteratorNotIndirectlyWritable>);
+static_assert(!HasReverseCopyR<UncheckedRange<int*>, OutputIteratorNotInputOrOutputIterator>);
+
+static_assert(std::is_same_v<std::ranges::reverse_copy_result<int, int>, std::ranges::in_out_result<int, int>>);
+
+template <class Iter, class OutIter, class Sent, int N>
+constexpr void test(std::array<int, N> value, std::array<int, N> expected) {
+  {
+    std::array<int, N> out;
+    std::same_as<std::ranges::in_out_result<Iter, OutIter>> decltype(auto) ret =
+        std::ranges::reverse_copy(Iter(value.data()),
+                                 Sent(Iter(value.data() + value.size())),
+                                 OutIter(out.data()));
+    assert(base(ret.in) == value.data() + value.size());
+    assert(base(ret.out) == out.data() + out.size());
+    assert(out == expected);
+  }
+  {
+    std::array<int, N> out;
+    auto range = std::ranges::subrange(Iter(value.data()), Sent(Iter(value.data() + value.size())));
+    std::same_as<std::ranges::in_out_result<Iter, OutIter>> decltype(auto) ret =
+        std::ranges::reverse_copy(range, OutIter(out.data()));
+    assert(base(ret.in) == value.data() + value.size());
+    assert(base(ret.out) == out.data() + out.size());
+    assert(out == expected);
+  }
+}
+
+template <class Iter, class OutIter, class Sent>
+constexpr void test_iterators() {
+  // simple test
+  test<Iter, OutIter, Sent, 4>({1, 2, 3, 4}, {4, 3, 2, 1});
+
+  // check that an empty range works
+  test<Iter, OutIter, Sent, 0>({}, {});
+
+  // check that a single element range works
+  test<Iter, OutIter, Sent, 1>({1}, {1});
+
+  // check that a two element range works
+  test<Iter, OutIter, Sent, 2>({1, 2}, {2, 1});
+}
+
+template <class Iter, class Sent = Iter>
+constexpr void test_out_iterators() {
+  test_iterators<Iter, cpp20_output_iterator<int*>, Sent>();
+  test_iterators<Iter, forward_iterator<int*>, Sent>();
+  test_iterators<Iter, bidirectional_iterator<int*>, Sent>();
+  test_iterators<Iter, random_access_iterator<int*>, Sent>();
+  test_iterators<Iter, contiguous_iterator<int*>, Sent>();
+  test_iterators<Iter, int*, Sent>();
+}
+
+constexpr bool test() {
+  test_out_iterators<bidirectional_iterator<int*>>();
+  test_out_iterators<random_access_iterator<int*>>();
+  test_out_iterators<contiguous_iterator<int*>>();
+  test_out_iterators<int*>();
+  test_out_iterators<const int*>();
+
+  {
+    struct AssignmentCounter {
+      int* counter;
+
+      constexpr AssignmentCounter(int* counter_) : counter(counter_) {}
+      constexpr AssignmentCounter& operator=(const AssignmentCounter&) { ++*counter; return *this; }
+    };
+
+    {
+      int c = 0;
+      AssignmentCounter a[] = {&c, &c, &c, &c};
+      AssignmentCounter b[] = {&c, &c, &c, &c};
+      std::ranges::reverse_copy(a, a + 4, b);
+      assert(c == 4);
+    }
+    {
+      int c = 0;
+      AssignmentCounter a[] = {&c, &c, &c, &c};
+      AssignmentCounter b[] = {&c, &c, &c, &c};
+      std::ranges::reverse_copy(a, b);
+      assert(c == 4);
+    }
+  }
+
+  return true;
+}
+
+int main(int, char**) {
+  test();
+  static_assert(test());
+
+  return 0;
+}

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

@@ -0,0 +1,70 @@
+//===----------------------------------------------------------------------===//
+//
+// 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<BidirectionalIterator Iter>
+//   requires HasSwap<Iter::reference, Iter::reference>
+//   constexpr void  // constexpr in C++20
+//   reverse(Iter first, Iter last);
+
+#include <algorithm>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_iterators.h"
+
+template <class Iter>
+TEST_CONSTEXPR_CXX20 bool
+test()
+{
+    int ia[] = {0};
+    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
+    std::reverse(Iter(ia), Iter(ia));
+    assert(ia[0] == 0);
+    std::reverse(Iter(ia), Iter(ia+sa));
+    assert(ia[0] == 0);
+
+    int ib[] = {0, 1};
+    const unsigned sb = sizeof(ib)/sizeof(ib[0]);
+    std::reverse(Iter(ib), Iter(ib+sb));
+    assert(ib[0] == 1);
+    assert(ib[1] == 0);
+
+    int ic[] = {0, 1, 2};
+    const unsigned sc = sizeof(ic)/sizeof(ic[0]);
+    std::reverse(Iter(ic), Iter(ic+sc));
+    assert(ic[0] == 2);
+    assert(ic[1] == 1);
+    assert(ic[2] == 0);
+
+    int id[] = {0, 1, 2, 3};
+    const unsigned sd = sizeof(id)/sizeof(id[0]);
+    std::reverse(Iter(id), Iter(id+sd));
+    assert(id[0] == 3);
+    assert(id[1] == 2);
+    assert(id[2] == 1);
+    assert(id[3] == 0);
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test<bidirectional_iterator<int*> >();
+    test<random_access_iterator<int*> >();
+    test<int*>();
+
+#if TEST_STD_VER >= 20
+    static_assert(test<bidirectional_iterator<int*>>());
+    static_assert(test<random_access_iterator<int*>>());
+    static_assert(test<int*>());
+#endif
+
+    return 0;
+}

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

@@ -0,0 +1,100 @@
+//===----------------------------------------------------------------------===//
+//
+// 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<BidirectionalIterator InIter, OutputIterator<auto, InIter::reference> OutIter>
+//   constexpr OutIter          // constexpr after C++17
+//   reverse_copy(InIter first, InIter last, OutIter result);
+
+#include <algorithm>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_iterators.h"
+
+#if TEST_STD_VER > 17
+TEST_CONSTEXPR bool test_constexpr() {
+    int ia[] = {1, 3, 5, 2, 5, 6};
+    int ib[std::size(ia)] = {0};
+
+    auto it = std::reverse_copy(std::begin(ia), std::end(ia), std::begin(ib));
+
+    return std::distance(std::begin(ib), it) == static_cast<int>(std::size(ia))
+        && std::equal   (std::begin(ia), std::end(ia), std::rbegin(ib))
+           ;
+    }
+#endif
+
+template <class InIter, class OutIter>
+void
+test()
+{
+    const int ia[] = {0};
+    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
+    int ja[sa] = {-1};
+    OutIter r = std::reverse_copy(InIter(ia), InIter(ia), OutIter(ja));
+    assert(base(r) == ja);
+    assert(ja[0] == -1);
+    r = std::reverse_copy(InIter(ia), InIter(ia+sa), OutIter(ja));
+    assert(ja[0] == 0);
+
+    const int ib[] = {0, 1};
+    const unsigned sb = sizeof(ib)/sizeof(ib[0]);
+    int jb[sb] = {-1};
+    r = std::reverse_copy(InIter(ib), InIter(ib+sb), OutIter(jb));
+    assert(base(r) == jb+sb);
+    assert(jb[0] == 1);
+    assert(jb[1] == 0);
+
+    const int ic[] = {0, 1, 2};
+    const unsigned sc = sizeof(ic)/sizeof(ic[0]);
+    int jc[sc] = {-1};
+    r = std::reverse_copy(InIter(ic), InIter(ic+sc), OutIter(jc));
+    assert(base(r) == jc+sc);
+    assert(jc[0] == 2);
+    assert(jc[1] == 1);
+    assert(jc[2] == 0);
+
+    int id[] = {0, 1, 2, 3};
+    const unsigned sd = sizeof(id)/sizeof(id[0]);
+    int jd[sd] = {-1};
+    r = std::reverse_copy(InIter(id), InIter(id+sd), OutIter(jd));
+    assert(base(r) == jd+sd);
+    assert(jd[0] == 3);
+    assert(jd[1] == 2);
+    assert(jd[2] == 1);
+    assert(jd[3] == 0);
+}
+
+int main(int, char**)
+{
+    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;
+}