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 Alloc>
13 // struct allocator_traits
14 // {
15 //     typedef Alloc::propagate_on_container_move_assignment
16 //           | false_type                   propagate_on_container_move_assignment;
17 //     ...
18 // };
19 
20 #include <memory>
21 #include <type_traits>
22 
23 template <class T>
24 struct A
25 {
26     typedef T value_type;
27     typedef std::true_type propagate_on_container_move_assignment;
28 };
29 
30 template <class T>
31 struct B
32 {
33     typedef T value_type;
34 };
35 
main()36 int main()
37 {
38     static_assert((std::is_same<std::allocator_traits<A<char> >::propagate_on_container_move_assignment, std::true_type>::value), "");
39     static_assert((std::is_same<std::allocator_traits<B<char> >::propagate_on_container_move_assignment, std::false_type>::value), "");
40 }
41