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38 lines
1.3 KiB
C++
38 lines
1.3 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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// <variant>
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// template <size_t I, class T> struct variant_alternative; // undefined
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// template <size_t I, class T> struct variant_alternative<I, const T>;
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// template <size_t I, class T> struct variant_alternative<I, volatile T>;
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// template <size_t I, class T> struct variant_alternative<I, const volatile T>;
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// template <size_t I, class T>
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// using variant_alternative_t = typename variant_alternative<I, T>::type;
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//
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// template <size_t I, class... Types>
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// struct variant_alternative<I, variant<Types...>>;
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#include <variant>
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#include <cassert>
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int main(int, char**)
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{
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{
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typedef std::variant<int, double> T;
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std::variant_alternative<2, T>::type foo; // expected-note {{requested here}}
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// expected-error-re@variant:* {{static_assert failed{{( due to requirement '2U[L]{0,2} < sizeof...\(_Types\)')?}} "Index out of bounds in std::variant_alternative<>"}}
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}
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return 0;
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}
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