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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: 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>
#include "test_macros.h"
int main(int, char**)
{
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), "");
}
return 0;
}
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