1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// <utility>
// template <class T1, class T2> struct pair
// pair(pair&&) = default;
#include <cassert>
#include <memory>
#include <type_traits>
#include <utility>
#include "test_macros.h"
struct Dummy {
Dummy(Dummy const&) = delete;
Dummy(Dummy &&) = default;
};
struct NotCopyOrMoveConstructible {
NotCopyOrMoveConstructible() = default;
NotCopyOrMoveConstructible(NotCopyOrMoveConstructible const&) = delete;
NotCopyOrMoveConstructible(NotCopyOrMoveConstructible&&) = delete;
};
int main(int, char**)
{
{
typedef std::pair<int, short> P1;
static_assert(std::is_move_constructible<P1>::value, "");
P1 p1(3, static_cast<short>(4));
P1 p2 = std::move(p1);
assert(p2.first == 3);
assert(p2.second == 4);
}
{
using P = std::pair<Dummy, int>;
static_assert(!std::is_copy_constructible<P>::value, "");
static_assert(std::is_move_constructible<P>::value, "");
}
{
// When constructing a pair containing a reference, we only bind the
// reference, so it doesn't matter whether the type is or isn't
// copy/move constructible.
{
using P = std::pair<NotCopyOrMoveConstructible&, int>;
static_assert(std::is_move_constructible<P>::value, "");
NotCopyOrMoveConstructible obj;
P p2{obj, 3};
P p1(std::move(p2));
assert(&p1.first == &obj);
assert(&p2.first == &obj);
}
{
using P = std::pair<NotCopyOrMoveConstructible&&, int>;
static_assert(std::is_move_constructible<P>::value, "");
NotCopyOrMoveConstructible obj;
P p2{std::move(obj), 3};
P p1(std::move(p2));
assert(&p1.first == &obj);
assert(&p2.first == &obj);
}
}
return 0;
}
|
