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ca0f8fd1 PC |
1 | // unique_ptr implementation -*- C++ -*- |
2 | ||
ab65a4c7 | 3 | // Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc. |
ca0f8fd1 PC |
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 | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
ca0f8fd1 PC |
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 | ||
748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
ca0f8fd1 | 24 | |
f910786b | 25 | /** @file bits/unique_ptr.h |
ca0f8fd1 | 26 | * This is an internal header file, included by other library headers. |
f910786b | 27 | * Do not attempt to use it directly. @headername{memory} |
ca0f8fd1 PC |
28 | */ |
29 | ||
30 | #ifndef _UNIQUE_PTR_H | |
31 | #define _UNIQUE_PTR_H 1 | |
32 | ||
ca0f8fd1 | 33 | #include <bits/c++config.h> |
20d85a99 | 34 | #include <debug/debug.h> |
ca0f8fd1 PC |
35 | #include <type_traits> |
36 | #include <utility> | |
37 | #include <tuple> | |
38 | ||
39 | _GLIBCXX_BEGIN_NAMESPACE(std) | |
40 | ||
5b9daa7e BK |
41 | /** |
42 | * @addtogroup pointer_abstractions | |
43 | * @{ | |
44 | */ | |
45 | ||
ad68e9fc | 46 | /// Primary template, default_delete. |
94a86be0 | 47 | template<typename _Tp> |
ca0f8fd1 | 48 | struct default_delete |
be9d3d73 PC |
49 | { |
50 | constexpr default_delete() { } | |
ca0f8fd1 | 51 | |
be9d3d73 PC |
52 | template<typename _Up, typename = typename |
53 | std::enable_if<std::is_convertible<_Up*, _Tp*>::value>::type> | |
54 | default_delete(const default_delete<_Up>&) { } | |
ca0f8fd1 | 55 | |
be9d3d73 PC |
56 | void |
57 | operator()(_Tp* __ptr) const | |
58 | { | |
59 | static_assert(sizeof(_Tp)>0, | |
60 | "can't delete pointer to incomplete type"); | |
61 | delete __ptr; | |
62 | } | |
ca0f8fd1 PC |
63 | }; |
64 | ||
65 | // _GLIBCXX_RESOLVE_LIB_DEFECTS | |
66 | // DR 740 - omit specialization for array objects with a compile time length | |
ad68e9fc | 67 | /// Specialization, default_delete. |
94a86be0 | 68 | template<typename _Tp> |
ca0f8fd1 PC |
69 | struct default_delete<_Tp[]> |
70 | { | |
be9d3d73 PC |
71 | constexpr default_delete() { } |
72 | ||
ca0f8fd1 PC |
73 | void |
74 | operator()(_Tp* __ptr) const | |
75 | { | |
76 | static_assert(sizeof(_Tp)>0, | |
77 | "can't delete pointer to incomplete type"); | |
78 | delete [] __ptr; | |
79 | } | |
80 | }; | |
81 | ||
37d5c6ba | 82 | /// 20.7.12.2 unique_ptr for single objects. |
94a86be0 | 83 | template <typename _Tp, typename _Dp = default_delete<_Tp> > |
ca0f8fd1 PC |
84 | class unique_ptr |
85 | { | |
7b65808d JW |
86 | // use SFINAE to determine whether _Del::pointer exists |
87 | class _Pointer | |
88 | { | |
89 | template<typename _Up> | |
90 | static typename _Up::pointer __test(typename _Up::pointer*); | |
91 | ||
92 | template<typename _Up> | |
93 | static _Tp* __test(...); | |
94 | ||
8fe286ea | 95 | typedef typename remove_reference<_Dp>::type _Del; |
7b65808d JW |
96 | |
97 | public: | |
94a86be0 | 98 | typedef decltype( __test<_Del>(0)) type; |
7b65808d JW |
99 | }; |
100 | ||
94a86be0 BK |
101 | typedef std::tuple<_Tp*, _Dp> __tuple_type; |
102 | __tuple_type _M_t; | |
103 | ||
ca0f8fd1 | 104 | public: |
7b65808d JW |
105 | typedef typename _Pointer::type pointer; |
106 | typedef _Tp element_type; | |
3abeaf8f | 107 | typedef _Dp deleter_type; |
ca0f8fd1 | 108 | |
37d5c6ba | 109 | // Constructors. |
be9d3d73 PC |
110 | constexpr unique_ptr() |
111 | : _M_t() | |
ef40b371 JW |
112 | { static_assert(!std::is_pointer<deleter_type>::value, |
113 | "constructed with null function pointer deleter"); } | |
ca0f8fd1 PC |
114 | |
115 | explicit | |
116 | unique_ptr(pointer __p) | |
117 | : _M_t(__p, deleter_type()) | |
118 | { static_assert(!std::is_pointer<deleter_type>::value, | |
119 | "constructed with null function pointer deleter"); } | |
120 | ||
121 | unique_ptr(pointer __p, | |
94a86be0 BK |
122 | typename std::conditional<std::is_reference<deleter_type>::value, |
123 | deleter_type, const deleter_type&>::type __d) | |
ca0f8fd1 PC |
124 | : _M_t(__p, __d) { } |
125 | ||
126 | unique_ptr(pointer __p, | |
94a86be0 | 127 | typename std::remove_reference<deleter_type>::type&& __d) |
ca0f8fd1 | 128 | : _M_t(std::move(__p), std::move(__d)) |
94a86be0 | 129 | { static_assert(!std::is_reference<deleter_type>::value, |
ca0f8fd1 PC |
130 | "rvalue deleter bound to reference"); } |
131 | ||
be9d3d73 | 132 | constexpr unique_ptr(nullptr_t) |
14b846de | 133 | : _M_t() |
ef40b371 JW |
134 | { static_assert(!std::is_pointer<deleter_type>::value, |
135 | "constructed with null function pointer deleter"); } | |
6d00745b | 136 | |
37d5c6ba | 137 | // Move constructors. |
94a86be0 | 138 | unique_ptr(unique_ptr&& __u) |
ca0f8fd1 PC |
139 | : _M_t(__u.release(), std::forward<deleter_type>(__u.get_deleter())) { } |
140 | ||
8fe286ea | 141 | template<typename _Up, typename _Ep, typename = typename |
5aadb69b | 142 | std::enable_if |
8fe286ea | 143 | <std::is_convertible<typename unique_ptr<_Up, _Ep>::pointer, |
5aadb69b PC |
144 | pointer>::value |
145 | && !std::is_array<_Up>::value | |
8fe286ea PC |
146 | && ((std::is_reference<_Dp>::value |
147 | && std::is_same<_Ep, _Dp>::value) | |
148 | || (!std::is_reference<_Dp>::value | |
149 | && std::is_convertible<_Ep, _Dp>::value))> | |
94a86be0 BK |
150 | ::type> |
151 | unique_ptr(unique_ptr<_Up, _Ep>&& __u) | |
152 | : _M_t(__u.release(), std::forward<deleter_type>(__u.get_deleter())) | |
ca0f8fd1 PC |
153 | { } |
154 | ||
5aadb69b PC |
155 | #if _GLIBCXX_DEPRECATED |
156 | template<typename _Up, typename = typename | |
157 | std::enable_if<std::is_convertible<_Up*, _Tp*>::value | |
8fe286ea | 158 | && std::is_same<_Dp, |
5aadb69b | 159 | default_delete<_Tp>>::value>::type> |
94a86be0 | 160 | unique_ptr(auto_ptr<_Up>&& __u) |
5aadb69b PC |
161 | : _M_t(__u.release(), deleter_type()) { } |
162 | #endif | |
163 | ||
37d5c6ba | 164 | // Destructor. |
ca0f8fd1 | 165 | ~unique_ptr() { reset(); } |
5aadb69b | 166 | |
37d5c6ba | 167 | // Assignment. |
ca0f8fd1 PC |
168 | unique_ptr& |
169 | operator=(unique_ptr&& __u) | |
94a86be0 BK |
170 | { |
171 | reset(__u.release()); | |
172 | get_deleter() = std::move(__u.get_deleter()); | |
173 | return *this; | |
ca0f8fd1 PC |
174 | } |
175 | ||
8fe286ea | 176 | template<typename _Up, typename _Ep, typename = typename |
94a86be0 | 177 | std::enable_if |
8fe286ea | 178 | <std::is_convertible<typename unique_ptr<_Up, _Ep>::pointer, |
5aadb69b | 179 | pointer>::value |
94a86be0 BK |
180 | && !std::is_array<_Up>::value>::type> |
181 | unique_ptr& | |
182 | operator=(unique_ptr<_Up, _Ep>&& __u) | |
ca0f8fd1 | 183 | { |
94a86be0 BK |
184 | reset(__u.release()); |
185 | get_deleter() = std::move(__u.get_deleter()); | |
186 | return *this; | |
187 | } | |
ca0f8fd1 PC |
188 | |
189 | unique_ptr& | |
6d00745b | 190 | operator=(nullptr_t) |
ca0f8fd1 PC |
191 | { |
192 | reset(); | |
193 | return *this; | |
194 | } | |
195 | ||
37d5c6ba | 196 | // Observers. |
d779a591 PC |
197 | typename std::add_lvalue_reference<element_type>::type |
198 | operator*() const | |
ca0f8fd1 | 199 | { |
3e2e1976 | 200 | _GLIBCXX_DEBUG_ASSERT(get() != pointer()); |
ca0f8fd1 PC |
201 | return *get(); |
202 | } | |
203 | ||
204 | pointer | |
205 | operator->() const | |
206 | { | |
3e2e1976 | 207 | _GLIBCXX_DEBUG_ASSERT(get() != pointer()); |
ca0f8fd1 PC |
208 | return get(); |
209 | } | |
210 | ||
211 | pointer | |
212 | get() const | |
213 | { return std::get<0>(_M_t); } | |
214 | ||
2ba34efc | 215 | deleter_type& |
ca0f8fd1 PC |
216 | get_deleter() |
217 | { return std::get<1>(_M_t); } | |
218 | ||
2ba34efc | 219 | const deleter_type& |
ca0f8fd1 PC |
220 | get_deleter() const |
221 | { return std::get<1>(_M_t); } | |
222 | ||
d29d4507 | 223 | explicit operator bool() const |
3e2e1976 | 224 | { return get() == pointer() ? false : true; } |
ca0f8fd1 | 225 | |
37d5c6ba | 226 | // Modifiers. |
ca0f8fd1 | 227 | pointer |
94a86be0 | 228 | release() |
ca0f8fd1 PC |
229 | { |
230 | pointer __p = get(); | |
3e2e1976 | 231 | std::get<0>(_M_t) = pointer(); |
ca0f8fd1 PC |
232 | return __p; |
233 | } | |
234 | ||
235 | void | |
0d5f7a16 | 236 | reset(pointer __p = pointer()) |
ca0f8fd1 | 237 | { |
3e2e1976 JW |
238 | using std::swap; |
239 | swap(std::get<0>(_M_t), __p); | |
240 | if (__p != pointer()) | |
241 | get_deleter()(__p); | |
ca0f8fd1 PC |
242 | } |
243 | ||
244 | void | |
ff74fd13 | 245 | swap(unique_ptr& __u) |
0d5f7a16 PC |
246 | { |
247 | using std::swap; | |
ca0f8fd1 PC |
248 | swap(_M_t, __u._M_t); |
249 | } | |
250 | ||
37d5c6ba | 251 | // Disable copy from lvalue. |
0d5f7a16 | 252 | unique_ptr(const unique_ptr&) = delete; |
0d5f7a16 | 253 | unique_ptr& operator=(const unique_ptr&) = delete; |
ca0f8fd1 | 254 | }; |
94a86be0 | 255 | |
37d5c6ba | 256 | /// 20.7.12.3 unique_ptr for array objects with a runtime length |
ca0f8fd1 PC |
257 | // [unique.ptr.runtime] |
258 | // _GLIBCXX_RESOLVE_LIB_DEFECTS | |
259 | // DR 740 - omit specialization for array objects with a compile time length | |
8fe286ea PC |
260 | template<typename _Tp, typename _Dp> |
261 | class unique_ptr<_Tp[], _Dp> | |
ca0f8fd1 | 262 | { |
94a86be0 BK |
263 | typedef std::tuple<_Tp*, _Dp> __tuple_type; |
264 | __tuple_type _M_t; | |
0d5f7a16 | 265 | |
ca0f8fd1 | 266 | public: |
94a86be0 BK |
267 | typedef _Tp* pointer; |
268 | typedef _Tp element_type; | |
269 | typedef _Dp deleter_type; | |
270 | ||
37d5c6ba | 271 | // Constructors. |
be9d3d73 | 272 | constexpr unique_ptr() |
14b846de | 273 | : _M_t() |
ef40b371 JW |
274 | { static_assert(!std::is_pointer<deleter_type>::value, |
275 | "constructed with null function pointer deleter"); } | |
ca0f8fd1 PC |
276 | |
277 | explicit | |
278 | unique_ptr(pointer __p) | |
279 | : _M_t(__p, deleter_type()) | |
14b846de JW |
280 | { static_assert(!std::is_pointer<deleter_type>::value, |
281 | "constructed with null function pointer deleter"); } | |
ca0f8fd1 PC |
282 | |
283 | unique_ptr(pointer __p, | |
94a86be0 BK |
284 | typename std::conditional<std::is_reference<deleter_type>::value, |
285 | deleter_type, const deleter_type&>::type __d) | |
ca0f8fd1 PC |
286 | : _M_t(__p, __d) { } |
287 | ||
288 | unique_ptr(pointer __p, | |
289 | typename std::remove_reference<deleter_type>::type && __d) | |
290 | : _M_t(std::move(__p), std::move(__d)) | |
94a86be0 | 291 | { static_assert(!std::is_reference<deleter_type>::value, |
ca0f8fd1 PC |
292 | "rvalue deleter bound to reference"); } |
293 | ||
be9d3d73 | 294 | constexpr unique_ptr(nullptr_t) |
14b846de | 295 | : _M_t() |
ef40b371 JW |
296 | { static_assert(!std::is_pointer<deleter_type>::value, |
297 | "constructed with null function pointer deleter"); } | |
6d00745b | 298 | |
37d5c6ba | 299 | // Move constructors. |
94a86be0 | 300 | unique_ptr(unique_ptr&& __u) |
ca0f8fd1 PC |
301 | : _M_t(__u.release(), std::forward<deleter_type>(__u.get_deleter())) { } |
302 | ||
94a86be0 BK |
303 | template<typename _Up, typename _Ep> |
304 | unique_ptr(unique_ptr<_Up, _Ep>&& __u) | |
ca0f8fd1 PC |
305 | : _M_t(__u.release(), std::forward<deleter_type>(__u.get_deleter())) |
306 | { } | |
307 | ||
37d5c6ba | 308 | // Destructor. |
ca0f8fd1 PC |
309 | ~unique_ptr() { reset(); } |
310 | ||
37d5c6ba | 311 | // Assignment. |
ca0f8fd1 PC |
312 | unique_ptr& |
313 | operator=(unique_ptr&& __u) | |
314 | { | |
315 | reset(__u.release()); | |
94a86be0 BK |
316 | get_deleter() = std::move(__u.get_deleter()); |
317 | return *this; | |
ca0f8fd1 PC |
318 | } |
319 | ||
94a86be0 BK |
320 | template<typename _Up, typename _Ep> |
321 | unique_ptr& | |
322 | operator=(unique_ptr<_Up, _Ep>&& __u) | |
ca0f8fd1 | 323 | { |
94a86be0 BK |
324 | reset(__u.release()); |
325 | get_deleter() = std::move(__u.get_deleter()); | |
326 | return *this; | |
327 | } | |
ca0f8fd1 PC |
328 | |
329 | unique_ptr& | |
6d00745b | 330 | operator=(nullptr_t) |
ca0f8fd1 PC |
331 | { |
332 | reset(); | |
333 | return *this; | |
334 | } | |
335 | ||
37d5c6ba | 336 | // Observers. |
94a86be0 BK |
337 | typename std::add_lvalue_reference<element_type>::type |
338 | operator[](size_t __i) const | |
ca0f8fd1 | 339 | { |
3e2e1976 | 340 | _GLIBCXX_DEBUG_ASSERT(get() != pointer()); |
ca0f8fd1 PC |
341 | return get()[__i]; |
342 | } | |
343 | ||
344 | pointer | |
345 | get() const | |
346 | { return std::get<0>(_M_t); } | |
347 | ||
94a86be0 | 348 | deleter_type& |
ca0f8fd1 PC |
349 | get_deleter() |
350 | { return std::get<1>(_M_t); } | |
351 | ||
2ba34efc | 352 | const deleter_type& |
ca0f8fd1 | 353 | get_deleter() const |
94a86be0 | 354 | { return std::get<1>(_M_t); } |
ca0f8fd1 | 355 | |
94a86be0 | 356 | explicit operator bool() const |
3e2e1976 | 357 | { return get() == pointer() ? false : true; } |
94a86be0 | 358 | |
37d5c6ba | 359 | // Modifiers. |
ca0f8fd1 | 360 | pointer |
94a86be0 | 361 | release() |
ca0f8fd1 PC |
362 | { |
363 | pointer __p = get(); | |
3e2e1976 | 364 | std::get<0>(_M_t) = pointer(); |
ca0f8fd1 PC |
365 | return __p; |
366 | } | |
367 | ||
368 | void | |
94a86be0 | 369 | reset(pointer __p = pointer()) |
ca0f8fd1 | 370 | { |
3e2e1976 JW |
371 | using std::swap; |
372 | swap(std::get<0>(_M_t), __p); | |
6d00745b JW |
373 | if (__p != nullptr) |
374 | get_deleter()(__p); | |
375 | } | |
376 | ||
377 | void | |
378 | reset(nullptr_t) | |
379 | { | |
380 | pointer __p = get(); | |
381 | std::get<0>(_M_t) = pointer(); | |
382 | if (__p != nullptr) | |
3e2e1976 | 383 | get_deleter()(__p); |
ca0f8fd1 PC |
384 | } |
385 | ||
0d5f7a16 PC |
386 | // DR 821. |
387 | template<typename _Up> | |
94a86be0 | 388 | void reset(_Up) = delete; |
0d5f7a16 | 389 | |
ca0f8fd1 | 390 | void |
ff74fd13 | 391 | swap(unique_ptr& __u) |
ca0f8fd1 PC |
392 | { |
393 | using std::swap; | |
394 | swap(_M_t, __u._M_t); | |
395 | } | |
396 | ||
37d5c6ba | 397 | // Disable copy from lvalue. |
0d5f7a16 PC |
398 | unique_ptr(const unique_ptr&) = delete; |
399 | unique_ptr& operator=(const unique_ptr&) = delete; | |
ca0f8fd1 | 400 | |
37d5c6ba | 401 | // Disable construction from convertible pointer types. |
ca0f8fd1 | 402 | // (N2315 - 20.6.5.3.1) |
ca0f8fd1 | 403 | template<typename _Up> |
94a86be0 | 404 | unique_ptr(_Up*, typename |
0d5f7a16 PC |
405 | std::conditional<std::is_reference<deleter_type>::value, |
406 | deleter_type, const deleter_type&>::type, | |
94a86be0 | 407 | typename std::enable_if<std::is_convertible<_Up*, |
0d5f7a16 PC |
408 | pointer>::value>::type* = 0) = delete; |
409 | ||
410 | template<typename _Up> | |
94a86be0 BK |
411 | unique_ptr(_Up*, typename std::remove_reference<deleter_type>::type&&, |
412 | typename std::enable_if<std::is_convertible<_Up*, | |
0d5f7a16 PC |
413 | pointer>::value>::type* = 0) = delete; |
414 | ||
415 | template<typename _Up> | |
94a86be0 BK |
416 | explicit |
417 | unique_ptr(_Up*, typename std::enable_if<std::is_convertible<_Up*, | |
0d5f7a16 | 418 | pointer>::value>::type* = 0) = delete; |
ca0f8fd1 | 419 | }; |
94a86be0 BK |
420 | |
421 | template<typename _Tp, typename _Dp> | |
ca0f8fd1 | 422 | inline void |
8fe286ea PC |
423 | swap(unique_ptr<_Tp, _Dp>& __x, |
424 | unique_ptr<_Tp, _Dp>& __y) | |
ca0f8fd1 PC |
425 | { __x.swap(__y); } |
426 | ||
8fe286ea PC |
427 | template<typename _Tp, typename _Dp, |
428 | typename _Up, typename _Ep> | |
ca0f8fd1 | 429 | inline bool |
8fe286ea PC |
430 | operator==(const unique_ptr<_Tp, _Dp>& __x, |
431 | const unique_ptr<_Up, _Ep>& __y) | |
ca0f8fd1 PC |
432 | { return __x.get() == __y.get(); } |
433 | ||
3abeaf8f PC |
434 | template<typename _Tp, typename _Dp> |
435 | inline bool | |
436 | operator==(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) | |
437 | { return __x.get() == nullptr; } | |
438 | ||
439 | template<typename _Tp, typename _Dp> | |
440 | inline bool | |
441 | operator==(nullptr_t, const unique_ptr<_Tp, _Dp>& __y) | |
442 | { return nullptr == __y.get(); } | |
443 | ||
8fe286ea PC |
444 | template<typename _Tp, typename _Dp, |
445 | typename _Up, typename _Ep> | |
ca0f8fd1 | 446 | inline bool |
8fe286ea PC |
447 | operator!=(const unique_ptr<_Tp, _Dp>& __x, |
448 | const unique_ptr<_Up, _Ep>& __y) | |
ca0f8fd1 PC |
449 | { return !(__x.get() == __y.get()); } |
450 | ||
3abeaf8f PC |
451 | template<typename _Tp, typename _Dp> |
452 | inline bool | |
453 | operator!=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) | |
454 | { return __x.get() != nullptr; } | |
455 | ||
456 | template<typename _Tp, typename _Dp> | |
457 | inline bool | |
458 | operator!=(nullptr_t, const unique_ptr<_Tp, _Dp>& __y) | |
459 | { return nullptr != __y.get(); } | |
460 | ||
8fe286ea PC |
461 | template<typename _Tp, typename _Dp, |
462 | typename _Up, typename _Ep> | |
ca0f8fd1 | 463 | inline bool |
8fe286ea PC |
464 | operator<(const unique_ptr<_Tp, _Dp>& __x, |
465 | const unique_ptr<_Up, _Ep>& __y) | |
ca0f8fd1 PC |
466 | { return __x.get() < __y.get(); } |
467 | ||
8fe286ea PC |
468 | template<typename _Tp, typename _Dp, |
469 | typename _Up, typename _Ep> | |
ca0f8fd1 | 470 | inline bool |
8fe286ea PC |
471 | operator<=(const unique_ptr<_Tp, _Dp>& __x, |
472 | const unique_ptr<_Up, _Ep>& __y) | |
ca0f8fd1 PC |
473 | { return !(__y.get() < __x.get()); } |
474 | ||
8fe286ea PC |
475 | template<typename _Tp, typename _Dp, |
476 | typename _Up, typename _Ep> | |
ca0f8fd1 | 477 | inline bool |
8fe286ea PC |
478 | operator>(const unique_ptr<_Tp, _Dp>& __x, |
479 | const unique_ptr<_Up, _Ep>& __y) | |
ca0f8fd1 PC |
480 | { return __y.get() < __x.get(); } |
481 | ||
8fe286ea PC |
482 | template<typename _Tp, typename _Dp, |
483 | typename _Up, typename _Ep> | |
ca0f8fd1 | 484 | inline bool |
8fe286ea PC |
485 | operator>=(const unique_ptr<_Tp, _Dp>& __x, |
486 | const unique_ptr<_Up, _Ep>& __y) | |
ca0f8fd1 PC |
487 | { return !(__x.get() < __y.get()); } |
488 | ||
b0e788cc | 489 | /// std::hash specialization for unique_ptr. |
8fe286ea PC |
490 | template<typename _Tp, typename _Dp> |
491 | struct hash<unique_ptr<_Tp, _Dp>> | |
492 | : public std::unary_function<unique_ptr<_Tp, _Dp>, size_t> | |
b0e788cc PC |
493 | { |
494 | size_t | |
8fe286ea | 495 | operator()(const unique_ptr<_Tp, _Dp>& __u) const |
b0e788cc | 496 | { |
8fe286ea | 497 | typedef unique_ptr<_Tp, _Dp> _UP; |
b0e788cc PC |
498 | return std::hash<typename _UP::pointer>()(__u.get()); |
499 | } | |
500 | }; | |
501 | ||
5b9daa7e BK |
502 | // @} group pointer_abstractions |
503 | ||
ca0f8fd1 PC |
504 | _GLIBCXX_END_NAMESPACE |
505 | ||
506 | #endif /* _UNIQUE_PTR_H */ |