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 // UNSUPPORTED: c++98, c++03
18
19 #include <tuple>
20 #include <type_traits>
21
22 struct A {};
23
main()24 int main()
25 {
26 {
27 typedef std::tuple<> T;
28 static_assert((std::is_base_of<std::true_type,
29 std::uses_allocator<T, A>>::value), "");
30 }
31 {
32 typedef std::tuple<int> T;
33 static_assert((std::is_base_of<std::true_type,
34 std::uses_allocator<T, A>>::value), "");
35 }
36 {
37 typedef std::tuple<char, int> T;
38 static_assert((std::is_base_of<std::true_type,
39 std::uses_allocator<T, A>>::value), "");
40 }
41 {
42 typedef std::tuple<double&, char, int> T;
43 static_assert((std::is_base_of<std::true_type,
44 std::uses_allocator<T, A>>::value), "");
45 }
46 }
47