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1 | // { dg-options "-std=gnu++1y" } |
2 | // { dg-do run } | |
3 | ||
4 | // Copyright (C) 2013 Free Software Foundation, Inc. | |
5 | // | |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
9 | // Free Software Foundation; either version 3, or (at your option) | |
10 | // any later version. | |
11 | ||
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | ||
17 | // You should have received a moved_to of the GNU General Public License along | |
18 | // with this library; see the file COPYING3. If not see | |
19 | // <http://www.gnu.org/licenses/>. | |
20 | ||
21 | #include <experimental/optional> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | int counter = 0; | |
25 | ||
26 | struct mixin_counter | |
27 | { | |
28 | mixin_counter() { ++counter; } | |
29 | mixin_counter(mixin_counter const&) { ++counter; } | |
30 | ~mixin_counter() { --counter; } | |
31 | }; | |
32 | ||
33 | struct value_type : private mixin_counter | |
34 | { | |
35 | value_type() = default; | |
36 | value_type(int) : state(1) { } | |
37 | value_type(std::initializer_list<char>, const char*) : state(2) { } | |
38 | int state = 0; | |
39 | }; | |
40 | ||
41 | int main() | |
42 | { | |
43 | using O = std::experimental::optional<value_type>; | |
44 | ||
45 | // Check emplace | |
46 | ||
47 | { | |
48 | O o; | |
49 | o.emplace(); | |
50 | VERIFY( o && o->state == 0 ); | |
51 | } | |
52 | { | |
53 | O o { std::experimental::in_place, 0 }; | |
54 | o.emplace(); | |
55 | VERIFY( o && o->state == 0 ); | |
56 | } | |
57 | ||
58 | { | |
59 | O o; | |
60 | o.emplace(0); | |
61 | VERIFY( o && o->state == 1 ); | |
62 | } | |
63 | { | |
64 | O o { std::experimental::in_place }; | |
65 | o.emplace(0); | |
66 | VERIFY( o && o->state == 1 ); | |
67 | } | |
68 | ||
69 | { | |
70 | O o; | |
71 | o.emplace({ 'a' }, ""); | |
72 | VERIFY( o && o->state == 2 ); | |
73 | } | |
74 | { | |
75 | O o { std::experimental::in_place }; | |
76 | o.emplace({ 'a' }, ""); | |
77 | VERIFY( o && o->state == 2 ); | |
78 | } | |
79 | ||
80 | static_assert( !std::is_constructible<O, std::initializer_list<int>, int>(), "" ); | |
81 | ||
82 | VERIFY( counter == 0 ); | |
83 | } |