ab95005a05
Requirements on character-like types are updated unconditionally, because `basic_string` does requires the default-constructibility. It might be possible to make `basic_string_view` support classes with non-public trivial default constructor, but this doesn't seem sensible. libcxxabi's `ItaniumDemangle.h` is also updated to avoid deprecated features.
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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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
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// <tuple>
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// inline constexpr ignore-type ignore;
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#include <cassert>
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#include <cstdint>
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#include <tuple>
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#include <type_traits>
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#include "test_macros.h"
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static_assert(std::is_trivially_copyable<decltype(std::ignore)>::value, "");
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static_assert(std::is_trivially_default_constructible<decltype(std::ignore)>::value, "");
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#if TEST_STD_VER >= 17
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[[nodiscard]] constexpr int test_nodiscard() { return 8294; }
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#endif
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TEST_CONSTEXPR_CXX14 bool test() {
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{ [[maybe_unused]] auto& ignore_v = std::ignore; }
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{ // Test that std::ignore provides converting assignment.
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auto& res = (std::ignore = 42);
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static_assert(noexcept(res = (std::ignore = 42)), "Must be noexcept");
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assert(&res == &std::ignore);
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}
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{ // Test bit-field binding.
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struct S {
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unsigned int bf : 3;
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};
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S s{0b010};
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auto& res = (std::ignore = s.bf);
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assert(&res == &std::ignore);
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}
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{ // Test that std::ignore provides copy/move constructors
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auto copy = std::ignore;
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[[maybe_unused]] auto moved = std::move(copy);
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}
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{ // Test that std::ignore provides copy/move assignment
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auto copy = std::ignore;
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copy = std::ignore;
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auto moved = std::ignore;
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moved = std::move(copy);
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}
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#if TEST_STD_VER >= 17
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{ std::ignore = test_nodiscard(); }
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#endif
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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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#if TEST_STD_VER >= 14
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static_assert(test(), "");
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#endif
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return 0;
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}
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