blob: 1c96dd42e808c0af6624e23b586a5f1188f95055 [file] [log] [blame]
//===----------------------------------------------------------------------===//
//
// 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
// <optional>
// template <class T> constexpr bool operator!=(const optional<T>& x, nullopt_t) noexcept;
// template <class T> constexpr bool operator!=(nullopt_t, const optional<T>& x) noexcept;
#include <optional>
int main()
{
using std::optional;
using std::nullopt_t;
using std::nullopt;
{
typedef int T;
typedef optional<T> O;
constexpr O o1; // disengaged
constexpr O o2{1}; // engaged
static_assert ( !(nullopt != o1), "" );
static_assert ( (nullopt != o2), "" );
static_assert ( !(o1 != nullopt), "" );
static_assert ( (o2 != nullopt), "" );
static_assert (noexcept(nullopt != o1), "");
static_assert (noexcept(o1 != nullopt), "");
}
}