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 // <utility>
11
12 // template <class T1, class T2> struct pair
13
14 // template<size_t I, class T1, class T2>
15 // typename tuple_element<I, std::pair<T1, T2> >::type&
16 // get(pair<T1, T2>&);
17
18 #include <utility>
19 #include <cassert>
20
21 #if __cplusplus > 201103L
22 struct S {
23 std::pair<int, int> a;
24 int k;
SS25 constexpr S() : a{1,2}, k(std::get<0>(a)) {}
26 };
27
getP()28 constexpr std::pair<int, int> getP () { return { 3, 4 }; }
29 #endif
30
main()31 int main()
32 {
33 {
34 typedef std::pair<int, short> P;
35 P p(3, 4);
36 assert(std::get<0>(p) == 3);
37 assert(std::get<1>(p) == 4);
38 std::get<0>(p) = 5;
39 std::get<1>(p) = 6;
40 assert(std::get<0>(p) == 5);
41 assert(std::get<1>(p) == 6);
42 }
43
44 #if __cplusplus > 201103L
45 {
46 static_assert(S().k == 1, "");
47 static_assert(std::get<1>(getP()) == 4, "");
48 }
49 #endif
50
51 }
52