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40 lines
1.0 KiB
C++
40 lines
1.0 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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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++98, c++03, c++11, c++14
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// <variant>
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// template <class T, class... Types>
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// constexpr bool holds_alternative(const variant<Types...>& v) noexcept;
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#include "test_macros.h"
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#include <variant>
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int main(int, char**) {
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{
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using V = std::variant<int>;
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constexpr V v;
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static_assert(std::holds_alternative<int>(v), "");
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}
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{
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using V = std::variant<int, long>;
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constexpr V v;
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static_assert(std::holds_alternative<int>(v), "");
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static_assert(!std::holds_alternative<long>(v), "");
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}
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{ // noexcept test
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using V = std::variant<int>;
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const V v;
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ASSERT_NOEXCEPT(std::holds_alternative<int>(v));
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}
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return 0;
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}
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