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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>
// constexpr const T* optional<T>::operator->() const;
#include <optional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
using std::optional;
struct X
{
constexpr int test() const {return 3;}
};
struct Y
{
int test() const noexcept {return 2;}
};
struct Z
{
const Z* operator&() const;
constexpr int test() const {return 1;}
};
int main(int, char**)
{
{
const std::optional<X> opt; ((void)opt);
ASSERT_SAME_TYPE(decltype(opt.operator->()), X const*);
ASSERT_NOEXCEPT(opt.operator->());
}
{
constexpr optional<X> opt(X{});
static_assert(opt->test() == 3, "");
}
{
constexpr optional<Y> opt(Y{});
assert(opt->test() == 2);
}
{
constexpr optional<Z> opt(Z{});
static_assert(opt->test() == 1, "");
}
return 0;
}
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