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 #include "test_macros.h"
22
23 #if TEST_STD_VER > 11
24 struct S {
25 std::pair<int, int> a;
26 int k;
SS27 constexpr S() : a{1,2}, k(std::get<0>(a)) {}
28 };
29
getP()30 constexpr std::pair<int, int> getP () { return { 3, 4 }; }
31 #endif
32
main()33 int main()
34 {
35 {
36 typedef std::pair<int, short> P;
37 P p(3, static_cast<short>(4));
38 assert(std::get<0>(p) == 3);
39 assert(std::get<1>(p) == 4);
40 std::get<0>(p) = 5;
41 std::get<1>(p) = 6;
42 assert(std::get<0>(p) == 5);
43 assert(std::get<1>(p) == 6);
44 }
45
46 #if TEST_STD_VER > 11
47 {
48 static_assert(S().k == 1, "");
49 static_assert(std::get<1>(getP()) == 4, "");
50 }
51 #endif
52
53 }
54