41 lines
1.4 KiB
C++
41 lines
1.4 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, c++11, c++14, c++17
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// UNSUPPORTED: libcpp-no-concepts
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// UNSUPPORTED: libcpp-has-no-incomplete-ranges
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// std::ranges::dangling;
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#include <ranges>
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#include <concepts>
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#include <type_traits>
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static_assert(std::is_empty_v<std::ranges::dangling>);
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template<int> struct S { };
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static_assert(std::is_nothrow_constructible_v<std::ranges::dangling>);
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static_assert(std::is_nothrow_constructible_v<std::ranges::dangling, S<0>>);
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static_assert(std::is_nothrow_constructible_v<std::ranges::dangling, S<0>, S<1>>);
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static_assert(std::is_nothrow_constructible_v<std::ranges::dangling, S<0>, S<1>, S<2>>);
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constexpr bool test_dangling() {
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[[maybe_unused]] auto a = std::ranges::dangling();
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[[maybe_unused]] auto b = std::ranges::dangling(S<0>());
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[[maybe_unused]] auto c = std::ranges::dangling(S<0>(), S<1>());
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[[maybe_unused]] auto d = std::ranges::dangling(S<0>(), S<1>(), S<2>());
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return true;
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}
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int main(int, char**) {
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static_assert(test_dangling());
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test_dangling();
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return 0;
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}
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