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52066eae | 1 | // { dg-do run { target c++11 } } |
b8214660 | 2 | |
a5544970 | 3 | // Copyright (C) 2011-2019 Free Software Foundation, Inc. |
b8214660 JW |
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 | // 20.6.7.2 uses-allocator construction | |
21 | ||
22 | #include <memory> | |
23 | #include <tuple> | |
24 | #include <testsuite_hooks.h> | |
25 | ||
26 | struct MyAlloc { }; | |
27 | ||
28 | // type that can't be constructed with an allocator | |
29 | struct CannotUse | |
30 | { | |
31 | CannotUse(int) : ok(true) { } | |
32 | ||
33 | bool ok; | |
34 | }; | |
35 | ||
36 | // type that can be constructed with an allocator | |
37 | // but which has uses_allocator == false | |
38 | struct DoesNotUse | |
39 | { | |
40 | typedef MyAlloc allocator_type; | |
41 | ||
42 | DoesNotUse(int) : ok(true) { } | |
43 | DoesNotUse(std::allocator_arg_t, MyAlloc, int) : ok(false) { } | |
44 | DoesNotUse(int, MyAlloc) : ok(false) { } | |
45 | ||
46 | bool ok; | |
47 | }; | |
48 | ||
49 | namespace std | |
50 | { | |
51 | template<typename A> | |
52 | struct uses_allocator<DoesNotUse, A> : false_type { }; | |
53 | } | |
54 | ||
55 | // type that can be constructed with an allocator as second argument | |
56 | struct UsesWithTag | |
57 | { | |
58 | typedef MyAlloc allocator_type; | |
59 | ||
60 | UsesWithTag(int) : ok(false) { } | |
61 | UsesWithTag(std::allocator_arg_t, MyAlloc, int) : ok(true) { } | |
62 | UsesWithTag(int, MyAlloc) : ok(false) { } | |
63 | ||
64 | bool ok; | |
65 | }; | |
66 | ||
67 | // type that can be constructed with an allocator as last argument | |
68 | struct UsesWithoutTag | |
69 | { | |
70 | typedef MyAlloc allocator_type; | |
71 | ||
72 | UsesWithoutTag(int) : ok(false) { } | |
73 | UsesWithoutTag(int, MyAlloc) : ok(true) { } | |
74 | ||
75 | bool ok; | |
76 | }; | |
77 | ||
78 | ||
79 | template<typename TestType, typename... T> | |
80 | bool test2(T... args) | |
81 | { | |
82 | using std::allocator_arg; | |
83 | using std::tuple; | |
84 | using std::get; | |
85 | ||
86 | tuple<TestType, T...> t(allocator_arg, MyAlloc(), 1, args...); | |
87 | ||
88 | return get<0>(t).ok; | |
89 | } | |
90 | ||
91 | template<typename... T> | |
92 | void test(T... args) | |
93 | { | |
b8214660 JW |
94 | VERIFY( test2<CannotUse>(args...) ); |
95 | VERIFY( test2<DoesNotUse>(args...) ); | |
96 | VERIFY( test2<UsesWithTag>(args...) ); | |
97 | VERIFY( test2<UsesWithoutTag>(args...) ); | |
98 | } | |
99 | ||
100 | int main() | |
101 | { | |
102 | test(); | |
103 | test(1); | |
104 | test(1, 2); | |
105 | return 0; | |
106 | } |