llvm/libcxx/test/libcxx/utilities/tuple/tuple.tuple/empty_member.pass.cpp

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

// <tuple>

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

// UNSUPPORTED: c++03

// This is not a portable test

#include <tuple>

#include "test_macros.h"

struct A {};

struct B {};

int main(int, char**)
{
    {
        typedef std::tuple<int, A> T;
        static_assert((sizeof(T) == sizeof(int)), "");
    }
    {
        typedef std::tuple<A, int> T;
        static_assert((sizeof(T) == sizeof(int)), "");
    }
    {
        typedef std::tuple<A, int, B> T;
        static_assert((sizeof(T) == sizeof(int)), "");
    }
    {
        typedef std::tuple<A, B, int> T;
        static_assert((sizeof(T) == sizeof(int)), "");
    }
    {
        typedef std::tuple<int, A, B> T;
        static_assert((sizeof(T) == sizeof(int)), "");
    }

  return 0;
}