C++程序  |  35行  |  963 B

//===----------------------------------------------------------------------===//
//
//                     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.
//
//===----------------------------------------------------------------------===//

// type_traits

// add_pointer

#include <type_traits>

template <class T, class U>
void test_add_pointer()
{
    static_assert((std::is_same<typename std::add_pointer<T>::type, U>::value), "");
#if _LIBCPP_STD_VER > 11
    static_assert((std::is_same<std::add_pointer_t<T>,     U>::value), "");
#endif
}

int main()
{
    test_add_pointer<void, void*>();
    test_add_pointer<int, int*>();
    test_add_pointer<int[3], int(*)[3]>();
    test_add_pointer<int&, int*>();
    test_add_pointer<const int&, const int*>();
    test_add_pointer<int*, int**>();
    test_add_pointer<const int*, const int**>();
}