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33 lines
1.2 KiB
C++
33 lines
1.2 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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 <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 <memory>
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#include <type_traits>
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#include <variant>
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int main() {
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using V = std::variant<int, void *, const void *, long double>;
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std::variant_alternative<4, V>::type foo; // expected-error@variant:* {{Index out of bounds in std::variant_alternative<>}}
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}
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