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be58e01d | 1 | // { dg-do run { target c++11 } } |
0ce619d2 | 2 | |
aad93da1 | 3 | // Copyright (C) 2011-2017 Free Software Foundation, Inc. |
0ce619d2 | 4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING3. If not see | |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | #include <tuple> | |
21 | #include <type_traits> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | template<typename T> | |
25 | typename std::decay<T>::type copy(T&& x) | |
26 | { return std::forward<T>(x); } | |
27 | ||
28 | template<typename... Args1, typename... Args2> | |
29 | void | |
30 | check_tuple_cat(std::tuple<Args1...> t1, std::tuple<Args2...> t2) | |
31 | { | |
0ce619d2 | 32 | typedef std::tuple<Args1..., Args2...> concatenated; |
33 | ||
34 | auto cat1 = std::tuple_cat( t1, t2 ); | |
35 | auto cat2 = std::tuple_cat(copy(t1), t2 ); | |
36 | auto cat3 = std::tuple_cat( t1, copy(t2)); | |
37 | auto cat4 = std::tuple_cat(copy(t1), copy(t2)); | |
38 | ||
39 | static_assert( std::is_same<decltype(cat1), concatenated>::value, "" ); | |
40 | static_assert( std::is_same<decltype(cat2), concatenated>::value, "" ); | |
41 | static_assert( std::is_same<decltype(cat3), concatenated>::value, "" ); | |
42 | static_assert( std::is_same<decltype(cat4), concatenated>::value, "" ); | |
43 | ||
44 | VERIFY( cat1 == cat2 ); | |
45 | VERIFY( cat1 == cat3 ); | |
46 | VERIFY( cat1 == cat4 ); | |
47 | } | |
48 | ||
49 | // libstdc++/48476 | |
50 | void test01() | |
51 | { | |
52 | int i = 0; | |
53 | std::tuple<> t0; | |
54 | std::tuple<int&> t1(i); | |
55 | std::tuple<int&, int> t2(i, 0); | |
56 | std::tuple<int const&, int, double> t3(i, 0, 0); | |
57 | ||
58 | check_tuple_cat(t0, t0); | |
59 | check_tuple_cat(t0, t1); | |
60 | check_tuple_cat(t0, t2); | |
61 | check_tuple_cat(t0, t3); | |
62 | ||
63 | check_tuple_cat(t1, t0); | |
64 | check_tuple_cat(t1, t1); | |
65 | check_tuple_cat(t1, t2); | |
66 | check_tuple_cat(t1, t3); | |
67 | ||
68 | check_tuple_cat(t2, t0); | |
69 | check_tuple_cat(t2, t1); | |
70 | check_tuple_cat(t2, t2); | |
71 | check_tuple_cat(t2, t3); | |
72 | ||
73 | check_tuple_cat(t3, t0); | |
74 | check_tuple_cat(t3, t1); | |
75 | check_tuple_cat(t3, t2); | |
76 | check_tuple_cat(t3, t3); | |
77 | } | |
78 | ||
79 | int main() | |
80 | { | |
81 | test01(); | |
82 | return 0; | |
83 | } |