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 U1, class U2> tuple(const pair<U1, U2>& u);
15
16 // UNSUPPORTED: c++98, c++03
17
18 #include <tuple>
19 #include <utility>
20 #include <cassert>
21
22 #include "test_macros.h"
23
main()24 int main()
25 {
26 {
27 typedef std::pair<long, char> T0;
28 typedef std::tuple<long long, short> T1;
29 T0 t0(2, 'a');
30 T1 t1 = t0;
31 assert(std::get<0>(t1) == 2);
32 assert(std::get<1>(t1) == short('a'));
33 }
34 #if TEST_STD_VER > 11
35 {
36 typedef std::pair<long, char> P0;
37 typedef std::tuple<long long, short> T1;
38 constexpr P0 p0(2, 'a');
39 constexpr T1 t1 = p0;
40 static_assert(std::get<0>(t1) == std::get<0>(p0), "");
41 static_assert(std::get<1>(t1) == std::get<1>(p0), "");
42 static_assert(std::get<0>(t1) == 2, "");
43 static_assert(std::get<1>(t1) == short('a'), "");
44 }
45 #endif
46 }
47