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 // <tuple>
11
12 // template <class... Types> class tuple;
13
14 // template <class... Types, class Alloc>
15 // struct uses_allocator<tuple<Types...>, Alloc> : true_type { };
16
17 #include <tuple>
18 #include <type_traits>
19
20 struct A {};
21
main()22 int main()
23 {
24 {
25 typedef std::tuple<> T;
26 static_assert((std::is_base_of<std::true_type,
27 std::uses_allocator<T, A>>::value), "");
28 }
29 {
30 typedef std::tuple<int> T;
31 static_assert((std::is_base_of<std::true_type,
32 std::uses_allocator<T, A>>::value), "");
33 }
34 {
35 typedef std::tuple<char, int> T;
36 static_assert((std::is_base_of<std::true_type,
37 std::uses_allocator<T, A>>::value), "");
38 }
39 {
40 typedef std::tuple<double&, char, int> T;
41 static_assert((std::is_base_of<std::true_type,
42 std::uses_allocator<T, A>>::value), "");
43 }
44 }
45