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 // UNSUPPORTED: c++98, c++03
11
12 // <utility>
13
14 // template <class T1, class T2> struct pair
15
16 // template <class... Args1, class... Args2>
17 // pair(piecewise_construct_t, tuple<Args1...> first_args,
18 // tuple<Args2...> second_args);
19
20 #include <cassert>
21 #include <tuple>
22 #include <utility>
23
24
main()25 int main()
26 {
27 {
28 typedef std::pair<int, int*> P1;
29 typedef std::pair<int*, int> P2;
30 typedef std::pair<P1, P2> P3;
31 P3 p3(std::piecewise_construct, std::tuple<int, int*>(3, nullptr),
32 std::tuple<int*, int>(nullptr, 4));
33 assert(p3.first == P1(3, nullptr));
34 assert(p3.second == P2(nullptr, 4));
35 }
36 }
37