Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Howard Hinnant | b64f8b0 | 2010-11-16 22:09:02 +0000 | [diff] [blame] | 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | // <memory> |
| 11 | |
| 12 | // unique_ptr |
| 13 | |
| 14 | // Example move-only deleter |
| 15 | |
| 16 | #ifndef DELETER_H |
| 17 | #define DELETER_H |
| 18 | |
| 19 | #include <type_traits> |
Marshall Clow | 6b913d7 | 2015-01-09 20:25:52 +0000 | [diff] [blame] | 20 | #include <utility> |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 21 | #include <cassert> |
| 22 | |
Eric Fiselier | 76581dc | 2015-07-31 02:43:52 +0000 | [diff] [blame] | 23 | #include "test_macros.h" |
| 24 | |
| 25 | #if TEST_STD_VER >= 11 |
| 26 | |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 27 | template <class T> |
| 28 | class Deleter |
| 29 | { |
| 30 | int state_; |
| 31 | |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 32 | Deleter(const Deleter&); |
| 33 | Deleter& operator=(const Deleter&); |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 34 | |
| 35 | public: |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 36 | Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;} |
| 37 | Deleter& operator=(Deleter&& r) |
| 38 | { |
| 39 | state_ = r.state_; |
| 40 | r.state_ = 0; |
| 41 | return *this; |
| 42 | } |
Eric Fiselier | 76581dc | 2015-07-31 02:43:52 +0000 | [diff] [blame] | 43 | |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 44 | |
| 45 | Deleter() : state_(0) {} |
| 46 | explicit Deleter(int s) : state_(s) {} |
| 47 | ~Deleter() {assert(state_ >= 0); state_ = -1;} |
| 48 | |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 49 | template <class U> |
| 50 | Deleter(Deleter<U>&& d, |
| 51 | typename std::enable_if<!std::is_same<U, T>::value>::type* = 0) |
| 52 | : state_(d.state()) {d.set_state(0);} |
| 53 | |
| 54 | private: |
| 55 | template <class U> |
| 56 | Deleter(const Deleter<U>& d, |
| 57 | typename std::enable_if<!std::is_same<U, T>::value>::type* = 0); |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 58 | public: |
| 59 | int state() const {return state_;} |
| 60 | void set_state(int i) {state_ = i;} |
| 61 | |
| 62 | void operator()(T* p) {delete p;} |
| 63 | }; |
| 64 | |
| 65 | template <class T> |
| 66 | class Deleter<T[]> |
| 67 | { |
| 68 | int state_; |
| 69 | |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 70 | Deleter(const Deleter&); |
| 71 | Deleter& operator=(const Deleter&); |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 72 | |
| 73 | public: |
Eric Fiselier | 76581dc | 2015-07-31 02:43:52 +0000 | [diff] [blame] | 74 | |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 75 | Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;} |
| 76 | Deleter& operator=(Deleter&& r) |
| 77 | { |
| 78 | state_ = r.state_; |
| 79 | r.state_ = 0; |
| 80 | return *this; |
| 81 | } |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 82 | |
| 83 | Deleter() : state_(0) {} |
| 84 | explicit Deleter(int s) : state_(s) {} |
| 85 | ~Deleter() {assert(state_ >= 0); state_ = -1;} |
| 86 | |
| 87 | int state() const {return state_;} |
| 88 | void set_state(int i) {state_ = i;} |
| 89 | |
| 90 | void operator()(T* p) {delete [] p;} |
| 91 | }; |
| 92 | |
Eric Fiselier | 76581dc | 2015-07-31 02:43:52 +0000 | [diff] [blame] | 93 | #else // TEST_STD_VER < 11 |
| 94 | |
| 95 | template <class T> |
| 96 | class Deleter |
| 97 | { |
| 98 | mutable int state_; |
| 99 | |
| 100 | public: |
| 101 | Deleter() : state_(0) {} |
| 102 | explicit Deleter(int s) : state_(s) {} |
| 103 | |
| 104 | Deleter(Deleter const & other) : state_(other.state_) { |
| 105 | other.state_ = 0; |
| 106 | } |
| 107 | Deleter& operator=(Deleter const& other) { |
| 108 | state_ = other.state_; |
| 109 | other.state_ = 0; |
| 110 | return *this; |
| 111 | } |
| 112 | |
| 113 | ~Deleter() {assert(state_ >= 0); state_ = -1;} |
| 114 | |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 115 | private: |
Eric Fiselier | 76581dc | 2015-07-31 02:43:52 +0000 | [diff] [blame] | 116 | template <class U> |
| 117 | Deleter(Deleter<U> d, |
| 118 | typename std::enable_if<!std::is_same<U, T>::value>::type* = 0) |
| 119 | : state_(d.state()) {} |
| 120 | |
| 121 | public: |
| 122 | int state() const {return state_;} |
| 123 | void set_state(int i) {state_ = i;} |
| 124 | |
| 125 | void operator()(T* p) {delete p;} |
| 126 | }; |
| 127 | |
| 128 | template <class T> |
| 129 | class Deleter<T[]> |
| 130 | { |
| 131 | mutable int state_; |
| 132 | |
| 133 | public: |
| 134 | |
| 135 | Deleter(Deleter const& other) : state_(other.state_) { |
| 136 | other.state_ = 0; |
| 137 | } |
| 138 | Deleter& operator=(Deleter const& other) { |
| 139 | state_ = other.state_; |
| 140 | other.state_ = 0; |
| 141 | return *this; |
| 142 | } |
| 143 | |
| 144 | Deleter() : state_(0) {} |
| 145 | explicit Deleter(int s) : state_(s) {} |
| 146 | ~Deleter() {assert(state_ >= 0); state_ = -1;} |
| 147 | |
| 148 | int state() const {return state_;} |
| 149 | void set_state(int i) {state_ = i;} |
| 150 | |
| 151 | void operator()(T* p) {delete [] p;} |
| 152 | }; |
| 153 | |
| 154 | #endif |
| 155 | |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 156 | template <class T> |
| 157 | void |
| 158 | swap(Deleter<T>& x, Deleter<T>& y) |
| 159 | { |
| 160 | Deleter<T> t(std::move(x)); |
| 161 | x = std::move(y); |
| 162 | y = std::move(t); |
| 163 | } |
| 164 | |
Eric Fiselier | 76581dc | 2015-07-31 02:43:52 +0000 | [diff] [blame] | 165 | |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 166 | template <class T> |
| 167 | class CDeleter |
| 168 | { |
| 169 | int state_; |
| 170 | |
| 171 | public: |
| 172 | |
| 173 | CDeleter() : state_(0) {} |
| 174 | explicit CDeleter(int s) : state_(s) {} |
| 175 | ~CDeleter() {assert(state_ >= 0); state_ = -1;} |
| 176 | |
| 177 | template <class U> |
| 178 | CDeleter(const CDeleter<U>& d) |
| 179 | : state_(d.state()) {} |
| 180 | |
| 181 | int state() const {return state_;} |
| 182 | void set_state(int i) {state_ = i;} |
| 183 | |
| 184 | void operator()(T* p) {delete p;} |
| 185 | }; |
| 186 | |
| 187 | template <class T> |
| 188 | class CDeleter<T[]> |
| 189 | { |
| 190 | int state_; |
| 191 | |
| 192 | public: |
| 193 | |
| 194 | CDeleter() : state_(0) {} |
| 195 | explicit CDeleter(int s) : state_(s) {} |
| 196 | ~CDeleter() {assert(state_ >= 0); state_ = -1;} |
| 197 | |
| 198 | int state() const {return state_;} |
| 199 | void set_state(int i) {state_ = i;} |
| 200 | |
| 201 | void operator()(T* p) {delete [] p;} |
| 202 | }; |
| 203 | |
| 204 | template <class T> |
| 205 | void |
| 206 | swap(CDeleter<T>& x, CDeleter<T>& y) |
| 207 | { |
| 208 | CDeleter<T> t(std::move(x)); |
| 209 | x = std::move(y); |
| 210 | y = std::move(t); |
| 211 | } |
| 212 | |
Eric Fiselier | 76581dc | 2015-07-31 02:43:52 +0000 | [diff] [blame] | 213 | // Non-copyable deleter |
| 214 | template <class T> |
| 215 | class NCDeleter |
| 216 | { |
| 217 | int state_; |
| 218 | NCDeleter(NCDeleter const&); |
| 219 | NCDeleter& operator=(NCDeleter const&); |
| 220 | public: |
| 221 | |
| 222 | NCDeleter() : state_(0) {} |
| 223 | explicit NCDeleter(int s) : state_(s) {} |
| 224 | ~NCDeleter() {assert(state_ >= 0); state_ = -1;} |
| 225 | |
| 226 | int state() const {return state_;} |
| 227 | void set_state(int i) {state_ = i;} |
| 228 | |
| 229 | void operator()(T* p) {delete p;} |
| 230 | }; |
| 231 | |
| 232 | |
| 233 | template <class T> |
| 234 | class NCDeleter<T[]> |
| 235 | { |
| 236 | int state_; |
| 237 | NCDeleter(NCDeleter const&); |
| 238 | NCDeleter& operator=(NCDeleter const&); |
| 239 | public: |
| 240 | |
| 241 | NCDeleter() : state_(0) {} |
| 242 | explicit NCDeleter(int s) : state_(s) {} |
| 243 | ~NCDeleter() {assert(state_ >= 0); state_ = -1;} |
| 244 | |
| 245 | int state() const {return state_;} |
| 246 | void set_state(int i) {state_ = i;} |
| 247 | |
| 248 | void operator()(T* p) {delete [] p;} |
| 249 | }; |
| 250 | |
| 251 | |
| 252 | // Non-copyable deleter |
| 253 | template <class T> |
| 254 | class NCConstDeleter |
| 255 | { |
| 256 | int state_; |
| 257 | NCConstDeleter(NCConstDeleter const&); |
| 258 | NCConstDeleter& operator=(NCConstDeleter const&); |
| 259 | public: |
| 260 | |
| 261 | NCConstDeleter() : state_(0) {} |
| 262 | explicit NCConstDeleter(int s) : state_(s) {} |
| 263 | ~NCConstDeleter() {assert(state_ >= 0); state_ = -1;} |
| 264 | |
| 265 | int state() const {return state_;} |
| 266 | void set_state(int i) {state_ = i;} |
| 267 | |
| 268 | void operator()(T* p) const {delete p;} |
| 269 | }; |
| 270 | |
| 271 | |
| 272 | template <class T> |
| 273 | class NCConstDeleter<T[]> |
| 274 | { |
| 275 | int state_; |
| 276 | NCConstDeleter(NCConstDeleter const&); |
| 277 | NCConstDeleter& operator=(NCConstDeleter const&); |
| 278 | public: |
| 279 | |
| 280 | NCConstDeleter() : state_(0) {} |
| 281 | explicit NCConstDeleter(int s) : state_(s) {} |
| 282 | ~NCConstDeleter() {assert(state_ >= 0); state_ = -1;} |
| 283 | |
| 284 | int state() const {return state_;} |
| 285 | void set_state(int i) {state_ = i;} |
| 286 | |
| 287 | void operator()(T* p) const {delete [] p;} |
| 288 | }; |
| 289 | |
| 290 | |
| 291 | // Non-copyable deleter |
| 292 | template <class T> |
| 293 | class CopyDeleter |
| 294 | { |
| 295 | int state_; |
| 296 | public: |
| 297 | |
| 298 | CopyDeleter() : state_(0) {} |
| 299 | explicit CopyDeleter(int s) : state_(s) {} |
| 300 | ~CopyDeleter() {assert(state_ >= 0); state_ = -1;} |
| 301 | |
| 302 | CopyDeleter(CopyDeleter const& other) : state_(other.state_) {} |
| 303 | CopyDeleter& operator=(CopyDeleter const& other) { |
| 304 | state_ = other.state_; |
| 305 | return *this; |
| 306 | } |
| 307 | |
| 308 | int state() const {return state_;} |
| 309 | void set_state(int i) {state_ = i;} |
| 310 | |
| 311 | void operator()(T* p) {delete p;} |
| 312 | }; |
| 313 | |
| 314 | |
| 315 | template <class T> |
| 316 | class CopyDeleter<T[]> |
| 317 | { |
| 318 | int state_; |
| 319 | |
| 320 | public: |
| 321 | |
| 322 | CopyDeleter() : state_(0) {} |
| 323 | explicit CopyDeleter(int s) : state_(s) {} |
| 324 | ~CopyDeleter() {assert(state_ >= 0); state_ = -1;} |
| 325 | |
| 326 | CopyDeleter(CopyDeleter const& other) : state_(other.state_) {} |
| 327 | CopyDeleter& operator=(CopyDeleter const& other) { |
| 328 | state_ = other.state_; |
| 329 | return *this; |
| 330 | } |
| 331 | |
| 332 | int state() const {return state_;} |
| 333 | void set_state(int i) {state_ = i;} |
| 334 | |
| 335 | void operator()(T* p) {delete [] p;} |
| 336 | }; |
| 337 | |
| 338 | |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 339 | #endif // DELETER_H |