//===----------------------------------------------------------------------===//
//
// 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
// Internal compiler error in 14.24
// XFAIL: msvc-19.20, msvc-19.21, msvc-19.22, msvc-19.23, msvc-19.24, msvc-19.25

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

#include "test_macros.h"

struct Empty {};

int main(int, char**)
{
    {
        typedef cuda::std::tuple<int> T;
        const T t(3);
        assert(cuda::std::get<0>(t) == 3);
    }
    // cuda::std::string not supported
    /*
    {
        typedef cuda::std::tuple<cuda::std::string, int> T;
        const T t("high", 5);
        assert(cuda::std::get<0>(t) == "high");
        assert(cuda::std::get<1>(t) == 5);
    }
    */
#if TEST_STD_VER > 11
    {
        typedef cuda::std::tuple<double, int> T;
        constexpr T t(2.718, 5);
        static_assert(cuda::std::get<0>(t) == 2.718, "");
        static_assert(cuda::std::get<1>(t) == 5, "");
    }
    {
        typedef cuda::std::tuple<Empty> T;
        constexpr T t{Empty()};
        constexpr Empty e = cuda::std::get<0>(t);
        ((void)e); // Prevent unused warning
    }
#endif
    // 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);
    }
    */
    {
        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);
    }
  return 0;
}
