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(pair<U1, U2>&& u);
14
15// UNSUPPORTED: c++03
16
17#include <tuple>
18#include <utility>
19#include <memory>
20#include <cassert>
21
22#include "test_macros.h"
23
24struct B
25{
26 int id_;
27
28 explicit B(int i) : id_(i) {}
29
30 virtual ~B() {}
31};
32
33struct D
34 : B
35{
36 explicit D(int i) : B(i) {}
37};
38
39int main(int, char**)
40{
41 {
42 typedef std::pair<long, std::unique_ptr<D>> T0;
43 typedef std::tuple<long long, std::unique_ptr<B>> T1;
44 T0 t0(2, std::unique_ptr<D>(new D(3)));
45 T1 t1 = std::move(t0);
46 assert(std::get<0>(t1) == 2);
47 assert(std::get<1>(t1)->id_ == 3);
48 }
49
50#if TEST_STD_VER > 11
51 {
52 using pair_t = std::pair<int, char>;
53 constexpr std::tuple<long, long> t(pair_t(0, 'a'));
54 static_assert(std::get<0>(t) == 0, "");
55 static_assert(std::get<1>(t) == 'a', "");
56 }
57#endif
58
59 return 0;
60}
61

source code of libcxx/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/move_pair.pass.cpp