//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// <cuda/std/tuple>

// template <class... Types> class tuple;

// template <size_t I, class... Types>
//   typename tuple_element<I, tuple<Types...> >::type const&
//   get(const tuple<Types...>& t);

// UNSUPPORTED: c++98, c++03 
// UNSUPPORTED: nvrtc

#include <cuda/std/tuple>
// cuda::std::string not supported
//#include <cuda/std/string>
#include <cuda/std/cassert>

int main(int, char**)
{
    // cuda::std::string not supported
    /*
    {
        typedef cuda::std::tuple<double&, cuda::std::string, int> T;
        double d = 1.5;
        const T t(d, "high", 5);
        assert(cuda::std::get<0>(t) == 1.5);
        assert(cuda::std::get<1>(t) == "high");
        assert(cuda::std::get<2>(t) == 5);
        cuda::std::get<0>(t) = 2.5;
        assert(cuda::std::get<0>(t) == 2.5);
        assert(cuda::std::get<1>(t) == "high");
        assert(cuda::std::get<2>(t) == 5);
        assert(d == 2.5);

        cuda::std::get<1>(t) = "four";
    }
    */
    {
        typedef cuda::std::tuple<double&, int> T;
        double d = 1.5;
        const T t(d, 5);
        assert(cuda::std::get<0>(t) == 1.5);
        assert(cuda::std::get<1>(t) == 5);
        cuda::std::get<0>(t) = 2.5;
        assert(cuda::std::get<0>(t) == 2.5);
        assert(cuda::std::get<1>(t) == 5);
        assert(d == 2.5);

        // Expected failure: <1> is not a modifiable lvalue
        cuda::std::get<1>(t) = 10;
    }
  return 0;
}
