1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <tuple>
10
11 // template <class... Types> class tuple;
12
13 // template <class U1, class U2> tuple(const pair<U1, U2>& u);
14
15 // UNSUPPORTED: c++03
16
17 #include <tuple>
18 #include <utility>
19 #include <cassert>
20
21 #include "test_macros.h"
22
main(int,char **)23 int main(int, char**)
24 {
25 {
26 typedef std::pair<long, char> T0;
27 typedef std::tuple<long long, short> T1;
28 T0 t0(2, 'a');
29 T1 t1 = t0;
30 assert(std::get<0>(t1) == 2);
31 assert(std::get<1>(t1) == short('a'));
32 }
33 #if TEST_STD_VER > 11
34 {
35 typedef std::pair<long, char> P0;
36 typedef std::tuple<long long, short> T1;
37 constexpr P0 p0(2, 'a');
38 constexpr T1 t1 = p0;
39 static_assert(std::get<0>(t1) == std::get<0>(p0), "");
40 static_assert(std::get<1>(t1) == std::get<1>(p0), "");
41 static_assert(std::get<0>(t1) == 2, "");
42 static_assert(std::get<1>(t1) == short('a'), "");
43 }
44 #endif
45
46 return 0;
47 }
48