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
|
// { dg-options "-std=gnu++17" }
// { dg-do compile { target c++17 } }
// Copyright (C) 2017-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <utility>
template<typename T, typename U> struct require_same;
template<typename T> struct require_same<T, T> { using type = void; };
template<typename T, typename U>
typename require_same<T, U>::type
check_type(U&) { }
struct MoveOnly
{
MoveOnly() = default;
MoveOnly(MoveOnly&&);
MoveOnly& operator=(MoveOnly&&);
};
void
test01()
{
std::pair x{5, 6u};
check_type<std::pair<int, unsigned>>(x);
int y = 42;
std::pair x2{y, 48u};
check_type<std::pair<int, unsigned>>(x2);
const int z = 666;
std::pair x3{z, y};
check_type<std::pair<int, int>>(x3);
std::pair x4{1, x};
check_type<std::pair<int, std::pair<int, unsigned>>>(x4);
std::pair mo{MoveOnly(), 2l};
check_type<std::pair<MoveOnly, long>>(mo);
mo = {MoveOnly(), 3l};
std::pair copy = x;
check_type<decltype(x)>(copy);
std::pair copy2{x};
check_type<decltype(x)>(copy2);
std::pair move = std::move(mo);
check_type<decltype(mo)>(move);
}
|
