| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // <tuple> |
| |
| // template <class... Types> class tuple; |
| |
| // ~tuple(); |
| |
| // C++17 added: |
| // The destructor of tuple shall be a trivial destructor |
| // if (is_trivially_destructible_v<Types> && ...) is true. |
| |
| #include <tuple> |
| #include <string> |
| #include <cassert> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| struct TrackDtor { |
| int* count_; |
| constexpr explicit TrackDtor(int* count) : count_(count) {} |
| TEST_CONSTEXPR_CXX14 TrackDtor(TrackDtor&& that) : count_(that.count_) { that.count_ = nullptr; } |
| TEST_CONSTEXPR_CXX20 ~TrackDtor() { if(count_) ++*count_; } |
| }; |
| static_assert(!std::is_trivially_destructible<TrackDtor>::value, ""); |
| |
| static_assert(std::is_trivially_destructible<std::tuple<>>::value, ""); |
| static_assert(std::is_trivially_destructible<std::tuple<void*>>::value, ""); |
| static_assert(std::is_trivially_destructible<std::tuple<int, float>>::value, ""); |
| static_assert(!std::is_trivially_destructible<std::tuple<std::string>>::value, ""); |
| static_assert(!std::is_trivially_destructible<std::tuple<int, std::string>>::value, ""); |
| |
| TEST_CONSTEXPR_CXX20 bool test() { |
| int count = 0; |
| { |
| std::tuple<TrackDtor> tuple{TrackDtor(&count)}; |
| assert(count == 0); |
| } |
| assert(count == 1); |
| |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| |
| return 0; |
| } |