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 // <memory>
11 
12 // template <class Ptr>
13 // struct pointer_traits
14 // {
15 //     typedef <details> element_type;
16 //     ...
17 // };
18 
19 #include <memory>
20 #include <type_traits>
21 
22 struct A
23 {
24     typedef char element_type;
25 };
26 
27 template <class T>
28 struct B
29 {
30     typedef char element_type;
31 };
32 
33 template <class T>
34 struct C
35 {
36 };
37 
38 template <class T, class U>
39 struct D
40 {
41 };
42 
43 int main()
44 {
45     static_assert((std::is_same<std::pointer_traits<A>::element_type, char>::value), "");
46     static_assert((std::is_same<std::pointer_traits<B<int> >::element_type, char>::value), "");
47     static_assert((std::is_same<std::pointer_traits<C<int> >::element_type, int>::value), "");
48     static_assert((std::is_same<std::pointer_traits<D<double, int> >::element_type, double>::value), "");
49 }
50