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 OuterAlloc, class... InnerAllocs>
13 //   class scoped_allocator_adaptor
14 
15 // scoped_allocator_adaptor select_on_container_copy_construction() const;
16 
17 #include <scoped_allocator>
18 #include <cassert>
19 
20 #include "allocators.h"
21 
main()22 int main()
23 {
24 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
25 
26     {
27         typedef std::scoped_allocator_adaptor<A1<int>> A;
28         A a1(A1<int>(3));
29         assert(a1.outer_allocator().id() == 3);
30         A a2 = std::allocator_traits<A>::select_on_container_copy_construction(a1);
31         assert(a2.outer_allocator().id() == 3);
32     }
33 
34     {
35         typedef std::scoped_allocator_adaptor<A3<int>> A;
36         A a1(A3<int>(3));
37         assert(a1.outer_allocator().id() == 3);
38         A a2 = std::allocator_traits<A>::select_on_container_copy_construction(a1);
39         assert(a2.outer_allocator().id() == -1);
40     }
41 
42     {
43         typedef std::scoped_allocator_adaptor<A1<int>, A2<int>, A3<int>> A;
44         A a1(A1<int>(1), A2<int>(2), A3<int>(3));
45         assert(a1.outer_allocator().id() == 1);
46         assert(a1.inner_allocator().outer_allocator().id() == 2);
47         assert(a1.inner_allocator().inner_allocator().outer_allocator().id() == 3);
48         A a2 = std::allocator_traits<A>::select_on_container_copy_construction(a1);
49         assert(a2.outer_allocator().id() == 1);
50         assert(a2.inner_allocator().outer_allocator().id() == 2);
51         assert(a2.inner_allocator().inner_allocator().outer_allocator().id() == -1);
52     }
53 
54 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
55 }
56