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cd9b223a | 1 | // { dg-options "-std=gnu++14" } |
2b5ab1e4 MB |
2 | // { dg-do run } |
3 | ||
5624e564 | 4 | // Copyright (C) 2013-2015 Free Software Foundation, Inc. |
2b5ab1e4 MB |
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 | #include <tuple> | |
25 | ||
26 | struct trivially_destructible | |
27 | { | |
28 | trivially_destructible() = delete; | |
29 | trivially_destructible(trivially_destructible const&) = delete; | |
30 | trivially_destructible& operator=(trivially_destructible const&) = delete; | |
31 | trivially_destructible(trivially_destructible&&) = delete; | |
32 | trivially_destructible& operator=(trivially_destructible&&) = delete; | |
33 | ~trivially_destructible() noexcept = default; | |
34 | }; | |
35 | ||
36 | static_assert( std::is_trivially_destructible<trivially_destructible>(), "" ); | |
37 | ||
38 | struct no_default_constructor | |
39 | { | |
40 | no_default_constructor() = delete; | |
41 | }; | |
42 | ||
43 | struct no_copy_constructor | |
44 | { | |
45 | no_copy_constructor() = default; | |
46 | no_copy_constructor(no_copy_constructor const&) = delete; | |
47 | no_copy_constructor& operator=(no_copy_constructor const&) = default; | |
48 | no_copy_constructor(no_copy_constructor&&) = default; | |
49 | no_copy_constructor& operator=(no_copy_constructor&&) = default; | |
50 | }; | |
51 | ||
52 | struct no_copy_assignment | |
53 | { | |
54 | no_copy_assignment() = default; | |
55 | no_copy_assignment(no_copy_assignment const&) = default; | |
56 | no_copy_assignment(no_copy_assignment&&) = default; | |
57 | no_copy_assignment& operator=(no_copy_assignment&&) = default; | |
58 | }; | |
59 | ||
60 | struct no_move_constructor | |
61 | { | |
62 | no_move_constructor() = default; | |
63 | no_move_constructor(no_move_constructor const&) = default; | |
64 | no_move_constructor& operator=(no_move_constructor const&) = default; | |
65 | no_move_constructor(no_move_constructor&&) = delete; | |
66 | no_move_constructor& operator=(no_move_constructor&&) = default; | |
67 | }; | |
68 | ||
69 | struct no_move_assignment | |
70 | { | |
71 | no_move_assignment() = default; | |
72 | no_move_assignment(no_move_assignment const&) = default; | |
73 | no_move_assignment& operator=(no_move_assignment const&) = default; | |
74 | no_move_assignment(no_move_assignment&&) = default; | |
75 | no_move_assignment& operator=(no_move_assignment&&) = delete; | |
76 | }; | |
77 | ||
78 | struct no_copy : no_copy_constructor, no_copy_assignment { }; | |
79 | struct no_move : no_move_constructor, no_move_assignment { }; | |
80 | ||
81 | // Laxest possible model of a value type for optional | |
82 | struct only_destructible | |
83 | { | |
84 | only_destructible(only_destructible&&) = delete; | |
85 | }; | |
86 | ||
87 | int main() | |
88 | { | |
89 | { | |
90 | static_assert( std::is_trivially_destructible<std::experimental::optional<trivially_destructible>>(), "" ); | |
91 | } | |
92 | ||
93 | { | |
94 | using T = no_default_constructor; | |
95 | using O = std::experimental::optional<T>; | |
96 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
97 | static_assert( std::is_default_constructible<O>(), "" ); | |
98 | { O o; } | |
99 | static_assert( std::is_copy_constructible<O>(), "" ); | |
100 | { O o; auto copy = o; } | |
101 | static_assert( std::is_copy_assignable<O>(), "" ); | |
102 | { O o, p; p = o; } | |
103 | static_assert( std::is_move_constructible<O>(), "" ); | |
104 | { O o; auto moved_to = std::move(o); } | |
105 | static_assert( std::is_move_assignable<O>(), "" ); | |
106 | { O o, p; p = std::move(o); } | |
107 | } | |
108 | ||
109 | { | |
110 | using T = no_copy_constructor; | |
111 | using O = std::experimental::optional<T>; | |
112 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
113 | static_assert( std::is_default_constructible<O>(), "" ); | |
114 | { O o; } | |
115 | static_assert( !std::is_copy_constructible<O>(), "" ); | |
116 | static_assert( !std::is_copy_assignable<O>(), "" ); | |
117 | static_assert( std::is_move_constructible<O>(), "" ); | |
118 | { O o; auto moved_to = std::move(o); } | |
119 | static_assert( std::is_move_assignable<O>(), "" ); | |
120 | { O o, p; p = std::move(o); } | |
121 | } | |
122 | ||
123 | { | |
124 | using T = no_copy_assignment; | |
125 | using O = std::experimental::optional<T>; | |
126 | static_assert( std::is_default_constructible<O>(), "" ); | |
127 | { O o; } | |
128 | static_assert( std::is_copy_constructible<O>(), "" ); | |
129 | { O o; auto copy = o; } | |
130 | static_assert( !std::is_copy_assignable<O>(), "" ); | |
131 | static_assert( std::is_move_constructible<O>(), "" ); | |
132 | { O o; auto moved_to = std::move(o); } | |
133 | static_assert( std::is_move_assignable<O>(), "" ); | |
134 | { O o, p; p = std::move(o); } | |
135 | } | |
136 | ||
137 | { | |
138 | using T = no_copy; | |
139 | using O = std::experimental::optional<T>; | |
140 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
141 | static_assert( std::is_default_constructible<O>(), "" ); | |
142 | { O o; } | |
143 | static_assert( !std::is_copy_constructible<O>(), "" ); | |
144 | static_assert( !std::is_copy_assignable<O>(), "" ); | |
145 | static_assert( std::is_move_constructible<O>(), "" ); | |
146 | { O o; auto moved_to = std::move(o); } | |
147 | static_assert( std::is_move_assignable<O>(), "" ); | |
148 | { O o, p; p = std::move(o); } | |
149 | } | |
150 | ||
151 | { | |
152 | using T = no_move_constructor; | |
153 | using O = std::experimental::optional<T>; | |
154 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
155 | static_assert( std::is_default_constructible<O>(), "" ); | |
156 | { O o; } | |
157 | static_assert( std::is_copy_constructible<O>(), "" ); | |
158 | { O o; auto copy = o; } | |
159 | static_assert( std::is_copy_assignable<O>(), "" ); | |
160 | /* | |
161 | * T should be move constructible due to [12.8/11], which is a new rule in C++1y | |
162 | * not yet implemented by GCC. Because there is already a special exception in C++11 | |
163 | * for the generation of the special members that GCC implements (at least some of the | |
164 | * time), this does not affect the std::experimental::optional implementation however. So the assertion | |
165 | * for T should be changed (or removed altogether) when the time comes, but the rest | |
166 | * should however remain correct and unchanged. | |
167 | */ | |
168 | static_assert( !std::is_move_constructible<T>(), "" ); | |
169 | static_assert( std::is_move_constructible<O>(), "" ); | |
170 | { O o; auto moved_to = std::move(o); } | |
171 | static_assert( std::is_move_assignable<O>(), "" ); | |
172 | { O o, p; p = std::move(o); } | |
173 | } | |
174 | ||
175 | { | |
176 | using T = no_move_assignment; | |
177 | using O = std::experimental::optional<T>; | |
178 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
179 | static_assert( std::is_default_constructible<O>(), "" ); | |
180 | { O o; } | |
181 | static_assert( std::is_copy_constructible<O>(), "" ); | |
182 | { O o; auto copy = o; } | |
183 | static_assert( std::is_copy_assignable<O>(), "" ); | |
184 | { O o, p; p = o; } | |
185 | static_assert( std::is_move_constructible<O>(), "" ); | |
186 | { O o; auto moved_to = std::move(o); } | |
187 | /* | |
188 | * Paragraph 23 of same leads to a similar situation but with respect to move | |
189 | * assignment. | |
190 | */ | |
191 | static_assert( !std::is_move_assignable<T>(), "" ); | |
192 | static_assert( std::is_move_assignable<O>(), "" ); | |
193 | { O o, p; p = std::move(o); } | |
194 | } | |
195 | ||
196 | { | |
197 | using T = no_move; | |
198 | using O = std::experimental::optional<T>; | |
199 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
200 | static_assert( std::is_default_constructible<O>(), "" ); | |
201 | { O o; } | |
202 | static_assert( std::is_copy_constructible<O>(), "" ); | |
203 | { O o; auto copy = o; } | |
204 | static_assert( std::is_copy_assignable<O>(), "" ); | |
205 | { O o, p; p = o; } | |
206 | static_assert( std::is_move_constructible<O>(), "" ); | |
207 | { O o; auto moved_to = std::move(o); } | |
208 | static_assert( std::is_move_assignable<O>(), "" ); | |
209 | { O o, p; p = std::move(o); } | |
210 | } | |
211 | ||
212 | { | |
213 | using T = only_destructible; | |
214 | using O = std::experimental::optional<T>; | |
215 | static_assert( std::is_same<O::value_type, T>(), "" ); | |
216 | static_assert( std::is_default_constructible<O>(), "" ); | |
217 | { O o; } | |
218 | static_assert( !std::is_copy_constructible<O>(), "" ); | |
219 | static_assert( !std::is_copy_assignable<O>(), "" ); | |
220 | static_assert( !std::is_move_constructible<O>(), "" ); | |
221 | static_assert( !std::is_move_assignable<O>(), "" ); | |
222 | } | |
223 | ||
224 | { | |
225 | /* | |
226 | * Should not complain about 'invalid' specializations as long as | |
227 | * they're not instantiated. | |
228 | */ | |
229 | using A = std::experimental::optional<int&>; | |
230 | using B = std::experimental::optional<int&&>; | |
231 | using C1 = std::experimental::optional<std::experimental::in_place_t>; | |
232 | using C2 = std::experimental::optional<std::experimental::in_place_t const>; | |
233 | using C3 = std::experimental::optional<std::experimental::in_place_t volatile>; | |
234 | using C4 = std::experimental::optional<std::experimental::in_place_t const volatile>; | |
235 | using D1 = std::experimental::optional<std::experimental::nullopt_t>; | |
236 | using D2 = std::experimental::optional<std::experimental::nullopt_t const>; | |
237 | using D3 = std::experimental::optional<std::experimental::nullopt_t volatile>; | |
238 | using D4 = std::experimental::optional<std::experimental::nullopt_t const volatile>; | |
239 | ||
240 | using X = std::tuple<A, B, C1, C2, C3, C4, D1, D2, D3, D4>; | |
241 | } | |
242 | ||
243 | { | |
244 | std::experimental::optional<const int> o { 42 }; | |
245 | static_assert( std::is_same<decltype(o)::value_type, const int>(), "" ); | |
246 | VERIFY( o ); | |
247 | VERIFY( *o == 42 ); | |
248 | } | |
249 | ||
250 | { | |
251 | constexpr std::experimental::optional<const int> o { 33 }; | |
252 | static_assert( std::is_same<decltype(o)::value_type, const int>(), "" ); | |
253 | static_assert( o, "" ); | |
254 | static_assert( *o == 33, "" ); | |
255 | } | |
256 | } |