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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, c++11, c++14, c++17, c++20
// Older Clangs do not support the C++20 feature to constrain destructors
// XFAIL: apple-clang-14
// constexpr ~expected();
//
// Effects: If has_value() is false, destroys unex.
//
// Remarks: If is_trivially_destructible_v<E> is true, then this destructor is a trivial destructor.
#include <cassert>
#include <expected>
#include <type_traits>
#include <utility>
#include "test_macros.h"
// Test Remarks: If is_trivially_destructible_v<E> is true, then this destructor is a trivial destructor.
struct NonTrivial {
~NonTrivial() {}
};
static_assert(std::is_trivially_destructible_v<std::expected<void, int>>);
static_assert(!std::is_trivially_destructible_v<std::expected<void, NonTrivial>>);
struct TrackedDestroy {
bool& destroyed;
constexpr TrackedDestroy(bool& b) : destroyed(b) {}
constexpr ~TrackedDestroy() { destroyed = true; }
};
constexpr bool test() {
// has value
{ [[maybe_unused]] std::expected<void, TrackedDestroy> e(std::in_place); }
// has error
{
bool errorDestroyed = false;
{ [[maybe_unused]] std::expected<void, TrackedDestroy> e(std::unexpect, errorDestroyed); }
assert(errorDestroyed);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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