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//     static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint);
16//     ...
17// };
18
19#include <memory>
20#include <cassert>
21
22template <class T>
23struct A
24{
25    typedef T value_type;
26
27    value_type* allocate(std::size_t n)
28    {
29        assert(n == 10);
30        return (value_type*)0xDEADBEEF;
31    }
32};
33
34template <class T>
35struct B
36{
37    typedef T value_type;
38
39    value_type* allocate(std::size_t n)
40    {
41        assert(n == 12);
42        return (value_type*)0xEEADBEEF;
43    }
44    value_type* allocate(std::size_t n, const void* p)
45    {
46        assert(n == 11);
47        assert(p == 0);
48        return (value_type*)0xFEADBEEF;
49    }
50};
51
52int main()
53{
54#ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE
55    A<int> a;
56    assert(std::allocator_traits<A<int> >::allocate(a, 10, nullptr) == (int*)0xDEADBEEF);
57#endif  // _LIBCPP_HAS_NO_ADVANCED_SFINAE
58    B<int> b;
59    assert(std::allocator_traits<B<int> >::allocate(b, 11, nullptr) == (int*)0xFEADBEEF);
60}
61