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//===----------------------------------------------------------------------===//
//
// 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;
}
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