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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.
//
//===----------------------------------------------------------------------===//
// <optional>
// constexpr const T& optional<T>::operator*() const;
#ifdef _LIBCPP_DEBUG
#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
#endif
#include <experimental/optional>
#include <type_traits>
#include <cassert>
#if _LIBCPP_STD_VER > 11
using std::experimental::optional;
struct X
{
constexpr int test() const {return 3;}
};
struct Y
{
int test() const {return 2;}
};
#endif // _LIBCPP_STD_VER > 11
int main()
{
#if _LIBCPP_STD_VER > 11
{
constexpr optional<X> opt(X{});
static_assert((*opt).test() == 3, "");
}
{
constexpr optional<Y> opt(Y{});
assert((*opt).test() == 2);
}
#ifdef _LIBCPP_DEBUG
{
const optional<X> opt;
assert((*opt).test() == 3);
assert(false);
}
#endif // _LIBCPP_DEBUG
#endif // _LIBCPP_STD_VER > 11
}
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