1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // type_traits
11 
12 // add_cv
13 
14 #include <type_traits>
15 
16 template <class T, class U>
test_add_cv_imp()17 void test_add_cv_imp()
18 {
19     static_assert((std::is_same<typename std::add_cv<T>::type, const volatile U>::value), "");
20 #if _LIBCPP_STD_VER > 11
21     static_assert((std::is_same<std::add_cv_t<T>, U>::value), "");
22 #endif
23 }
24 
25 template <class T>
test_add_cv()26 void test_add_cv()
27 {
28     test_add_cv_imp<T, const volatile T>();
29     test_add_cv_imp<const T, const volatile T>();
30     test_add_cv_imp<volatile T, volatile const T>();
31     test_add_cv_imp<const volatile T, const volatile T>();
32 }
33 
main()34 int main()
35 {
36     test_add_cv<void>();
37     test_add_cv<int>();
38     test_add_cv<int[3]>();
39     test_add_cv<int&>();
40     test_add_cv<const int&>();
41     test_add_cv<int*>();
42     test_add_cv<const int*>();
43 }
44