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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>
// template <class T>
// class optional
// {
// public:
// typedef T value_type;
// ...
#include <optional>
#include <type_traits>
using std::optional;
template <class Opt, class T>
void
test()
{
static_assert(std::is_same<typename Opt::value_type, T>::value, "");
}
int main()
{
test<optional<int>, int>();
test<optional<const int>, const int>();
test<optional<double>, double>();
test<optional<const double>, const double>();
}
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