| 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| 10 | |
| 11 | // <utility> |
| 12 | |
| 13 | // LWG-3382 NTTP for pair and array: |
| 14 | // Two values p1 and p2 of type pair<T, U> are template-argument-equivalent ([temp.type]) if and only if |
| 15 | // p1.first and p2.first are template-argument-equivalent and p1.second and p2.second are template-argument-equivalent. |
| 16 | |
| 17 | // This deprecated ABI switch makes pair a non-structural type. |
| 18 | // XFAIL: libcpp-deprecated-abi-disable-pair-trivial-copy-ctor |
| 19 | |
| 20 | #include <utility> |
| 21 | |
| 22 | #include <type_traits> |
| 23 | |
| 24 | int i = 0; |
| 25 | int j = 1; |
| 26 | |
| 27 | namespace test_full_type { |
| 28 | template <class T, class U, std::pair<T, U> P> |
| 29 | struct test : std::false_type {}; |
| 30 | |
| 31 | template <> |
| 32 | struct test<int&, int, std::pair<int&, int>{i, 5}> : std::true_type {}; |
| 33 | |
| 34 | static_assert(!test<int*, int*, std::pair<int*, int*>{}>::value); |
| 35 | static_assert(!test<int*, int, std::pair<int*, int>{}>::value); |
| 36 | static_assert(!test<int&, int*, std::pair<int&, int*>{i, nullptr}>::value); |
| 37 | static_assert(!test<int&, int, std::pair<int&, int>{j, 0}>::value); |
| 38 | static_assert(!test<int&, int, std::pair<int&, int>{j, 5}>::value); |
| 39 | static_assert(!test<int&, int, std::pair<int&, int>{i, 0}>::value); |
| 40 | static_assert(!test<int&, unsigned int, std::pair<int&, unsigned int>{j, 0}>::value); |
| 41 | static_assert(test<int&, int, std::pair<int&, int>{i, 5}>::value); |
| 42 | } // namespace test_full_type |
| 43 | |
| 44 | namespace test_ctad { |
| 45 | template <std::pair P> |
| 46 | struct test : std::false_type {}; |
| 47 | |
| 48 | template <> |
| 49 | struct test<std::pair<int&, int>{i, 10}> : std::true_type {}; |
| 50 | |
| 51 | static_assert(!test<std::pair<int*, int*>{}>::value); |
| 52 | static_assert(!test<std::pair<int*, int>{}>::value); |
| 53 | static_assert(!test<std::pair<int&, int*>{i, nullptr}>::value); |
| 54 | static_assert(!test<std::pair<int&, int>{j, 0}>::value); |
| 55 | static_assert(!test<std::pair<int&, int>{j, 10}>::value); |
| 56 | static_assert(!test<std::pair<int&, int>{i, 0}>::value); |
| 57 | static_assert(!test<std::pair<int&, unsigned int>{j, 0}>::value); |
| 58 | static_assert(test<std::pair<int&, int>{i, 10}>::value); |
| 59 | } // namespace test_ctad |
| 60 | |
| 61 | namespace test_auto { |
| 62 | template <auto P> |
| 63 | struct test : std::false_type {}; |
| 64 | |
| 65 | template <> |
| 66 | struct test<std::pair<int&, int>{i, 15}> : std::true_type {}; |
| 67 | |
| 68 | static_assert(!test<std::pair<int*, int*>{}>::value); |
| 69 | static_assert(!test<std::pair<int*, int>{}>::value); |
| 70 | static_assert(!test<std::pair<int&, int*>{i, nullptr}>::value); |
| 71 | static_assert(!test<std::pair<int&, int>{j, 0}>::value); |
| 72 | static_assert(!test<std::pair<int&, int>{j, 15}>::value); |
| 73 | static_assert(!test<std::pair<int&, int>{i, 0}>::value); |
| 74 | static_assert(!test<std::pair<int&, unsigned int>{j, 0}>::value); |
| 75 | static_assert(test<std::pair<int&, int>{i, 15}>::value); |
| 76 | } // namespace test_auto |
| 77 | |