//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <variant>
// UNSUPPORTED: c++03, c++11, c++14
// 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 <variant>
#include <cassert>
int main(int, char**)
{
{
typedef std::variant<int, double> T;
std::variant_alternative<2, T>::type foo; // expected-note {{requested here}}
// expected-error-re@variant:* {{static assertion failed{{( due to requirement '2U[L]{0,2} < sizeof...\(_Types\)')?}}{{.*}}Index out of bounds in std::variant_alternative<>}}
}
return 0;
}