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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
// XFAIL: libcpp-no-exceptions
// <optional>
// T& optional<T>::value();
#include <experimental/optional>
#include <type_traits>
#include <cassert>
using std::experimental::optional;
using std::experimental::bad_optional_access;
struct X
{
X() = default;
X(const X&) = delete;
constexpr int test() const {return 3;}
int test() {return 4;}
};
int main()
{
{
optional<X> opt;
opt.emplace();
assert(opt.value().test() == 4);
}
{
optional<X> opt;
try
{
opt.value();
assert(false);
}
catch (const bad_optional_access&)
{
}
}
}
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