1fd3173e02
Concepts should be supported by all supported compilers. This is probably a left over from an older version of the expected patch. Reviewed By: #libc, philnik Differential Revision: https://reviews.llvm.org/D140632
58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
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// Older Clangs do not support the C++20 feature to constrain destructors
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// XFAIL: clang-14, apple-clang-14
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// constexpr ~expected();
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//
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// Effects: If has_value() is false, destroys unex.
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//
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// Remarks: If is_trivially_destructible_v<E> is true, then this destructor is a trivial destructor.
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#include <cassert>
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#include <expected>
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#include <type_traits>
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#include <utility>
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#include "test_macros.h"
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// Test Remarks: If is_trivially_destructible_v<E> is true, then this destructor is a trivial destructor.
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struct NonTrivial {
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~NonTrivial() {}
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};
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static_assert(std::is_trivially_destructible_v<std::expected<void, int>>);
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static_assert(!std::is_trivially_destructible_v<std::expected<void, NonTrivial>>);
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struct TrackedDestroy {
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bool& destroyed;
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constexpr TrackedDestroy(bool& b) : destroyed(b) {}
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constexpr ~TrackedDestroy() { destroyed = true; }
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};
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constexpr bool test() {
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// has value
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{ [[maybe_unused]] std::expected<void, TrackedDestroy> e(std::in_place); }
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// has error
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{
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bool errorDestroyed = false;
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{ [[maybe_unused]] std::expected<void, TrackedDestroy> e(std::unexpect, errorDestroyed); }
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assert(errorDestroyed);
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}
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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