]>
Commit | Line | Data |
---|---|---|
1 | // { dg-do run { target c++14 } } | |
2 | ||
3 | // Copyright (C) 2013-2020 Free Software Foundation, Inc. | |
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 <experimental/optional> | |
21 | #include <testsuite_hooks.h> | |
22 | ||
23 | #include <tuple> | |
24 | ||
25 | using std::experimental::bad_optional_access; | |
26 | static_assert( std::is_default_constructible<bad_optional_access>::value, "" ); | |
27 | ||
28 | struct trivially_destructible | |
29 | { | |
30 | trivially_destructible() = delete; | |
31 | trivially_destructible(trivially_destructible const&) = delete; | |
32 | trivially_destructible& operator=(trivially_destructible const&) = delete; | |
33 | trivially_destructible(trivially_destructible&&) = delete; | |
34 | trivially_destructible& operator=(trivially_destructible&&) = delete; | |
35 | ~trivially_destructible() noexcept = default; | |
36 | }; | |
37 | ||
38 | static_assert( std::is_trivially_destructible<trivially_destructible>(), "" ); | |
39 | ||
40 | struct no_default_constructor | |
41 | { | |
42 | no_default_constructor() = delete; | |
43 | }; | |
44 | ||
45 | struct no_copy_constructor | |
46 | { | |
47 | no_copy_constructor() = default; | |
48 | no_copy_constructor(no_copy_constructor const&) = delete; | |
49 | no_copy_constructor& operator=(no_copy_constructor const&) = default; | |
50 | no_copy_constructor(no_copy_constructor&&) = default; | |
51 | no_copy_constructor& operator=(no_copy_constructor&&) = default; | |
52 | }; | |
53 | ||
54 | struct no_copy_assignment | |
55 | { | |
56 | no_copy_assignment() = default; | |
57 | no_copy_assignment(no_copy_assignment const&) = default; | |
58 | no_copy_assignment(no_copy_assignment&&) = default; | |
59 | no_copy_assignment& operator=(no_copy_assignment&&) = default; | |
60 | }; | |
61 | ||
62 | struct no_move_constructor | |
63 | { | |
64 | no_move_constructor() = default; | |
65 | no_move_constructor(no_move_constructor const&) = default; | |
66 | no_move_constructor& operator=(no_move_constructor const&) = default; | |
67 | no_move_constructor(no_move_constructor&&) = delete; | |
68 | no_move_constructor& operator=(no_move_constructor&&) = default; | |
69 | }; | |
70 | ||
71 | struct no_move_assignment | |
72 | { | |
73 | no_move_assignment() = default; | |
74 | no_move_assignment(no_move_assignment const&) = default; | |
75 | no_move_assignment& operator=(no_move_assignment const&) = default; | |
76 | no_move_assignment(no_move_assignment&&) = default; | |
77 | no_move_assignment& operator=(no_move_assignment&&) = delete; | |
78 | }; | |
79 | ||
80 | struct no_copy : no_copy_constructor, no_copy_assignment { }; | |
81 | struct no_move : no_move_constructor, no_move_assignment { }; | |
82 | ||
83 | // Laxest possible model of a value type for optional | |
84 | struct only_destructible | |
85 | { | |
86 | only_destructible(only_destructible&&) = delete; | |
87 | }; | |
88 | ||
89 | int main() | |
90 | { | |
91 | { | |
92 | static_assert( std::is_trivially_destructible<std::experimental::optional<trivially_destructible>>(), "" ); | |
93 | } | |
94 | ||
95 | { | |
96 | using T = no_default_constructor; | |
97 | using O = std::experimental::optional<T>; | |
98 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
99 | static_assert( std::is_default_constructible<O>(), "" ); | |
100 | { O o; } | |
101 | static_assert( std::is_copy_constructible<O>(), "" ); | |
102 | { O o; auto copy = o; } | |
103 | static_assert( std::is_copy_assignable<O>(), "" ); | |
104 | { O o, p; p = o; } | |
105 | static_assert( std::is_move_constructible<O>(), "" ); | |
106 | { O o; auto moved_to = std::move(o); } | |
107 | static_assert( std::is_move_assignable<O>(), "" ); | |
108 | { O o, p; p = std::move(o); } | |
109 | } | |
110 | ||
111 | { | |
112 | using T = no_copy_constructor; | |
113 | using O = std::experimental::optional<T>; | |
114 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
115 | static_assert( std::is_default_constructible<O>(), "" ); | |
116 | { O o; } | |
117 | static_assert( !std::is_copy_constructible<O>(), "" ); | |
118 | static_assert( !std::is_copy_assignable<O>(), "" ); | |
119 | static_assert( std::is_move_constructible<O>(), "" ); | |
120 | { O o; auto moved_to = std::move(o); } | |
121 | static_assert( std::is_move_assignable<O>(), "" ); | |
122 | { O o, p; p = std::move(o); } | |
123 | } | |
124 | ||
125 | { | |
126 | using T = no_copy_assignment; | |
127 | using O = std::experimental::optional<T>; | |
128 | static_assert( std::is_default_constructible<O>(), "" ); | |
129 | { O o; } | |
130 | static_assert( std::is_copy_constructible<O>(), "" ); | |
131 | { O o; auto copy = o; } | |
132 | static_assert( !std::is_copy_assignable<O>(), "" ); | |
133 | static_assert( std::is_move_constructible<O>(), "" ); | |
134 | { O o; auto moved_to = std::move(o); } | |
135 | static_assert( std::is_move_assignable<O>(), "" ); | |
136 | { O o, p; p = std::move(o); } | |
137 | } | |
138 | ||
139 | { | |
140 | using T = no_copy; | |
141 | using O = std::experimental::optional<T>; | |
142 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
143 | static_assert( std::is_default_constructible<O>(), "" ); | |
144 | { O o; } | |
145 | static_assert( !std::is_copy_constructible<O>(), "" ); | |
146 | static_assert( !std::is_copy_assignable<O>(), "" ); | |
147 | static_assert( std::is_move_constructible<O>(), "" ); | |
148 | { O o; auto moved_to = std::move(o); } | |
149 | static_assert( std::is_move_assignable<O>(), "" ); | |
150 | { O o, p; p = std::move(o); } | |
151 | } | |
152 | ||
153 | { | |
154 | using T = no_move_constructor; | |
155 | using O = std::experimental::optional<T>; | |
156 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
157 | static_assert( std::is_default_constructible<O>(), "" ); | |
158 | { O o; } | |
159 | static_assert( std::is_copy_constructible<O>(), "" ); | |
160 | { O o; auto copy = o; } | |
161 | static_assert( std::is_copy_assignable<O>(), "" ); | |
162 | /* | |
163 | * T should be move constructible due to [12.8/11], which is a new rule in C++1y | |
164 | * not yet implemented by GCC. Because there is already a special exception in C++11 | |
165 | * for the generation of the special members that GCC implements (at least some of the | |
166 | * time), this does not affect the std::experimental::optional implementation however. So the assertion | |
167 | * for T should be changed (or removed altogether) when the time comes, but the rest | |
168 | * should however remain correct and unchanged. | |
169 | */ | |
170 | static_assert( !std::is_move_constructible<T>(), "" ); | |
171 | static_assert( std::is_move_constructible<O>(), "" ); | |
172 | { O o; auto moved_to = std::move(o); } | |
173 | static_assert( std::is_move_assignable<O>(), "" ); | |
174 | { O o, p; p = std::move(o); } | |
175 | } | |
176 | ||
177 | { | |
178 | using T = no_move_assignment; | |
179 | using O = std::experimental::optional<T>; | |
180 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
181 | static_assert( std::is_default_constructible<O>(), "" ); | |
182 | { O o; } | |
183 | static_assert( std::is_copy_constructible<O>(), "" ); | |
184 | { O o; auto copy = o; } | |
185 | static_assert( std::is_copy_assignable<O>(), "" ); | |
186 | { O o, p; p = o; } | |
187 | static_assert( std::is_move_constructible<O>(), "" ); | |
188 | { O o; auto moved_to = std::move(o); } | |
189 | /* | |
190 | * Paragraph 23 of same leads to a similar situation but with respect to move | |
191 | * assignment. | |
192 | */ | |
193 | static_assert( !std::is_move_assignable<T>(), "" ); | |
194 | static_assert( std::is_move_assignable<O>(), "" ); | |
195 | { O o, p; p = std::move(o); } | |
196 | } | |
197 | ||
198 | { | |
199 | using T = no_move; | |
200 | using O = std::experimental::optional<T>; | |
201 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
202 | static_assert( std::is_default_constructible<O>(), "" ); | |
203 | { O o; } | |
204 | static_assert( std::is_copy_constructible<O>(), "" ); | |
205 | { O o; auto copy = o; } | |
206 | static_assert( std::is_copy_assignable<O>(), "" ); | |
207 | { O o, p; p = o; } | |
208 | static_assert( std::is_move_constructible<O>(), "" ); | |
209 | { O o; auto moved_to = std::move(o); } | |
210 | static_assert( std::is_move_assignable<O>(), "" ); | |
211 | { O o, p; p = std::move(o); } | |
212 | } | |
213 | ||
214 | { | |
215 | using T = only_destructible; | |
216 | using O = std::experimental::optional<T>; | |
217 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
218 | static_assert( std::is_default_constructible<O>(), "" ); | |
219 | { O o; } | |
220 | static_assert( !std::is_copy_constructible<O>(), "" ); | |
221 | static_assert( !std::is_copy_assignable<O>(), "" ); | |
222 | static_assert( !std::is_move_constructible<O>(), "" ); | |
223 | static_assert( !std::is_move_assignable<O>(), "" ); | |
224 | } | |
225 | ||
226 | { | |
227 | /* | |
228 | * Should not complain about 'invalid' specializations as long as | |
229 | * they're not instantiated. | |
230 | */ | |
231 | using A = std::experimental::optional<int&>; | |
232 | using B = std::experimental::optional<int&&>; | |
233 | using C1 = std::experimental::optional<std::experimental::in_place_t>; | |
234 | using C2 = std::experimental::optional<std::experimental::in_place_t const>; | |
235 | using C3 = std::experimental::optional<std::experimental::in_place_t volatile>; | |
236 | using C4 = std::experimental::optional<std::experimental::in_place_t const volatile>; | |
237 | using D1 = std::experimental::optional<std::experimental::nullopt_t>; | |
238 | using D2 = std::experimental::optional<std::experimental::nullopt_t const>; | |
239 | using D3 = std::experimental::optional<std::experimental::nullopt_t volatile>; | |
240 | using D4 = std::experimental::optional<std::experimental::nullopt_t const volatile>; | |
241 | ||
242 | using X = std::tuple<A, B, C1, C2, C3, C4, D1, D2, D3, D4>; | |
243 | } | |
244 | ||
245 | { | |
246 | std::experimental::optional<const int> o { 42 }; | |
247 | static_assert( std::is_same<decltype(o)::value_type, const int>(), "" ); | |
248 | VERIFY( o ); | |
249 | VERIFY( *o == 42 ); | |
250 | } | |
251 | ||
252 | { | |
253 | constexpr std::experimental::optional<const int> o { 33 }; | |
254 | static_assert( std::is_same<decltype(o)::value_type, const int>(), "" ); | |
255 | static_assert( o, "" ); | |
256 | static_assert( *o == 33, "" ); | |
257 | } | |
258 | } |