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//===----------------------------------------------------------------------===//
//
// 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>
// constexpr bool optional<T>::has_value() const noexcept;
#include <optional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
int main()
{
using std::optional;
{
const optional<int> opt; ((void)opt);
ASSERT_NOEXCEPT(opt.has_value());
ASSERT_SAME_TYPE(decltype(opt.has_value()), bool);
}
{
constexpr optional<int> opt;
static_assert(!opt.has_value(), "");
}
{
constexpr optional<int> opt(0);
static_assert(opt.has_value(), "");
}
}
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