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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// <variant>
// template <size_t I, class T> struct variant_alternative; // undefined
// template <size_t I, class T> struct variant_alternative<I, const T>;
// template <size_t I, class T> struct variant_alternative<I, volatile T>;
// template <size_t I, class T> struct variant_alternative<I, const volatile T>;
// template <size_t I, class T>
// using variant_alternative_t = typename variant_alternative<I, T>::type;
//
// template <size_t I, class... Types>
// struct variant_alternative<I, variant<Types...>>;
#include <memory>
#include <type_traits>
#include <variant>
int main() {
using V = std::variant<int, void *, const void *, long double>;
std::variant_alternative<4, V>::type foo; // expected-error@variant:* {{Index out of bounds in std::variant_alternative<>}}
}
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