libstdc++
safe_iterator.tcc
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1 // Debugging iterator implementation (out of line) -*- C++ -*-
2 
3 // Copyright (C) 2003-2025 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 // 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
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22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file debug/safe_iterator.tcc
26  * This file is a GNU debug extension to the Standard C++ Library.
27  */
28 
29 #ifndef _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC
30 #define _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC 1
31 
32 #include <bits/stl_algobase.h>
33 
34 namespace __gnu_debug
35 {
36  template<typename _Iterator, typename _Sequence, typename _Category>
37  typename _Distance_traits<_Iterator>::__type
38  _Safe_iterator<_Iterator, _Sequence, _Category>::
39  _M_get_distance_from_begin() const
40  {
41  typedef _Sequence_traits<_Sequence> _SeqTraits;
42 
43  // No need to consider before_begin as this function is only used in
44  // _M_can_advance which won't be used for forward_list iterators.
45  if (_M_is_begin())
46  return std::make_pair(0, __dp_exact);
47 
48  if (_M_is_end())
49  return _SeqTraits::_S_size(*_M_get_sequence());
50 
51  typename _Distance_traits<_Iterator>::__type __res
52  = __get_distance(_M_get_sequence()->_M_base().begin(), base());
53 
54  if (__res.second == __dp_equality)
55  return std::make_pair(1, __dp_sign);
56 
57  return __res;
58  }
59 
60  template<typename _Iterator, typename _Sequence, typename _Category>
61  typename _Distance_traits<_Iterator>::__type
62  _Safe_iterator<_Iterator, _Sequence, _Category>::
63  _M_get_distance_to_end() const
64  {
65  typedef _Sequence_traits<_Sequence> _SeqTraits;
66 
67  // No need to consider before_begin as this function is only used in
68  // _M_can_advance which won't be used for forward_list iterators.
69  if (_M_is_begin())
70  return _SeqTraits::_S_size(*_M_get_sequence());
71 
72  if (_M_is_end())
73  return std::make_pair(0, __dp_exact);
74 
75  typename _Distance_traits<_Iterator>::__type __res
76  = __get_distance(base(), _M_get_sequence()->_M_base().end());
77 
78  if (__res.second == __dp_equality)
79  return std::make_pair(1, __dp_sign);
80 
81  return __res;
82  }
83 
84  template<typename _Iterator, typename _Sequence, typename _Category>
85  bool
86  _Safe_iterator<_Iterator, _Sequence, _Category>::
87  _M_can_advance(difference_type __n, bool __strict) const
88  {
89  if (this->_M_value_initialized() && __n == 0)
90  return true;
91 
92  if (this->_M_singular())
93  return false;
94 
95  if (__n == 0)
96  return true;
97 
99  ? _M_get_distance_from_begin()
100  : _M_get_distance_to_end();
101 
102  if (__n < 0)
103  __n = -__n;
104 
105  return __dist.second > __dp_sign
106  ? __dist.first >= __n
107  : !__strict && __dist.first > 0;
108  }
109 
110  template<typename _Iterator, typename _Sequence, typename _Category>
111  template<typename _Diff>
112  bool
113  _Safe_iterator<_Iterator, _Sequence, _Category>::
114  _M_can_advance(const std::pair<_Diff, _Distance_precision>& __dist,
115  int __way) const
116  {
117  return __dist.second == __dp_exact
118  ? _M_can_advance(__way * __dist.first)
119  : _M_can_advance(__way * (__dist.first == 0
120  ? 0
121  : __dist.first < 0 ? -1 : 1));
122  }
123 
124  template<typename _Iterator, typename _Sequence, typename _Category>
125  typename _Distance_traits<_Iterator>::__type
126  _Safe_iterator<_Iterator, _Sequence, _Category>::
127  _M_get_distance_to(const _Safe_iterator& __rhs) const
128  {
129  typedef typename _Distance_traits<_Iterator>::__type _Dist;
130  typedef _Sequence_traits<_Sequence> _SeqTraits;
131 
132  _Dist __base_dist = __get_distance(this->base(), __rhs.base());
133  if (__base_dist.second == __dp_exact)
134  return __base_dist;
135 
136  _Dist __seq_dist = _SeqTraits::_S_size(*this->_M_get_sequence());
137  if (this->_M_is_before_begin())
138  {
139  if (__rhs._M_is_begin())
140  return std::make_pair(1, __dp_exact);
141 
142  return __seq_dist.second == __dp_exact
143  ? std::make_pair(__seq_dist.first + 1, __dp_exact)
144  : __seq_dist;
145  }
146 
147  if (this->_M_is_begin())
148  {
149  if (__rhs._M_is_before_begin())
150  return std::make_pair(-1, __dp_exact);
151 
152  if (__rhs._M_is_end())
153  return __seq_dist;
154 
155  return std::make_pair(__seq_dist.first,
156  __seq_dist.second == __dp_exact
157  ? __dp_sign_max_size : __seq_dist.second);
158  }
159 
160  if (this->_M_is_end())
161  {
162  if (__rhs._M_is_before_begin())
163  return __seq_dist.second == __dp_exact
164  ? std::make_pair(-__seq_dist.first - 1, __dp_exact)
165  : std::make_pair(-__seq_dist.first, __dp_sign);
166 
167  if (__rhs._M_is_begin())
168  return std::make_pair(-__seq_dist.first, __seq_dist.second);
169 
170  return std::make_pair(-__seq_dist.first,
171  __seq_dist.second == __dp_exact
172  ? __dp_sign_max_size : __seq_dist.second);
173  }
174 
175  if (__rhs._M_is_before_begin())
176  return __seq_dist.second == __dp_exact
177  ? std::make_pair(__seq_dist.first - 1, __dp_exact)
178  : std::make_pair(-__seq_dist.first, __dp_sign);
179 
180  if (__rhs._M_is_begin())
181  return std::make_pair(-__seq_dist.first,
182  __seq_dist.second == __dp_exact
183  ? __dp_sign_max_size : __seq_dist.second);
184 
185  if (__rhs._M_is_end())
186  return std::make_pair(__seq_dist.first,
187  __seq_dist.second == __dp_exact
188  ? __dp_sign_max_size : __seq_dist.second);
189 
190  return std::make_pair(1, __dp_equality);
191  }
192 
193  template<typename _Iterator, typename _Sequence, typename _Category>
194  bool
195  _Safe_iterator<_Iterator, _Sequence, _Category>::
196  _M_valid_range(const _Safe_iterator& __rhs,
198  bool __check_dereferenceable) const
199  {
200  if (_M_value_initialized() && __rhs._M_value_initialized())
201  {
202  __dist = std::make_pair(0, __dp_exact);
203  return true;
204  }
205 
206  if (_M_singular() || __rhs._M_singular() || !_M_can_compare(__rhs))
207  return false;
208 
209  /* Determine iterators order */
210  __dist = _M_get_distance_to(__rhs);
211  if (__dist.second != __dp_equality)
212  {
213  // If range is not empty first iterator must be dereferenceable.
214  return __dist.first == 0
215  || (__dist.first > 0
216  && (!__check_dereferenceable || _M_dereferenceable()));
217  }
218 
219  // Assume that this is a valid range; we can't check anything else.
220  return true;
221  }
222 
223  template<typename _Iterator, typename _Sequence>
224  bool
225  _Safe_iterator<_Iterator, _Sequence, std::random_access_iterator_tag>::
226  _M_valid_range(const _Safe_iterator& __rhs,
227  std::pair<difference_type,
228  _Distance_precision>& __dist) const
229  {
230  if (this->_M_value_initialized() && __rhs._M_value_initialized())
231  {
232  __dist = std::make_pair(0, __dp_exact);
233  return true;
234  }
235 
236  if (this->_M_singular() || __rhs._M_singular()
237  || !this->_M_can_compare(__rhs))
238  return false;
239 
240  /* Determine iterators order */
241  __dist = std::make_pair(__rhs.base() - this->base(), __dp_exact);
242 
243  // If range is not empty first iterator must be dereferenceable.
244  return __dist.first == 0
245  || (__dist.first > 0 && this->_M_dereferenceable());
246  }
247 } // namespace __gnu_debug
248 
249 namespace std _GLIBCXX_VISIBILITY(default)
250 {
251 _GLIBCXX_BEGIN_NAMESPACE_VERSION
252 
253 #if __cplusplus < 201103L
254  template<typename _Ite, typename _Seq>
255  _Ite
256  __niter_base(const ::__gnu_debug::_Safe_iterator<_Ite, _Seq,
258  { return __it.base(); }
259 
260  template<typename _Ite, typename _Cont, typename _DbgSeq>
261  _Ite
262  __niter_base(const ::__gnu_debug::_Safe_iterator<
263  ::__gnu_cxx::__normal_iterator<_Ite, _Cont>, _DbgSeq,
265  { return __it.base().base(); }
266 #else
267  template<typename _Ite, typename _Seq>
268  _GLIBCXX20_CONSTEXPR
269  decltype(std::__niter_base(std::declval<_Ite>()))
270  __niter_base(const ::__gnu_debug::_Safe_iterator<_Ite, _Seq,
271  std::random_access_iterator_tag>& __it)
272  noexcept(std::is_nothrow_copy_constructible<_Ite>::value)
273  { return std::__niter_base(__it.base()); }
274 #endif
275 
276  template<bool _IsMove,
277  typename _Ite, typename _Seq, typename _Cat, typename _OI>
278  _GLIBCXX20_CONSTEXPR
279  _OI
280  __copy_move_a(
281  const ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>& __first,
282  const ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>& __last,
283  _OI __result)
284  {
285  typename ::__gnu_debug::_Distance_traits<_Ite>::__type __dist;
286  __glibcxx_check_valid_range2(__first, __last, __dist);
287  __glibcxx_check_can_increment_dist(__result, __dist, 1);
288 
289  if (__dist.second > ::__gnu_debug::__dp_equality)
290  return std::__copy_move_a<_IsMove>(__first.base(), __last.base(),
291  __result);
292 
293  return std::__copy_move_a1<_IsMove>(__first, __last, __result);
294  }
295 
296  template<bool _IsMove,
297  typename _II, typename _Ite, typename _Seq, typename _Cat>
298  _GLIBCXX20_CONSTEXPR
300  __copy_move_a(_II __first, _II __last,
301  const ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>& __result)
302  {
303  typename ::__gnu_debug::_Distance_traits<_II>::__type __dist;
304  __glibcxx_check_valid_range2(__first, __last, __dist);
305  __glibcxx_check_can_increment_dist(__result, __dist, 1);
306 
307  if (__dist.second > ::__gnu_debug::__dp_sign
308  && __result._M_can_advance(__dist.first, true))
309  return ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>(
310  std::__copy_move_a<_IsMove>(__first, __last, __result.base()),
311  __result._M_sequence);
312 
313  return std::__copy_move_a1<_IsMove>(__first, __last, __result);
314  }
315 
316  template<bool _IsMove,
317  typename _IIte, typename _ISeq, typename _ICat,
318  typename _OIte, typename _OSeq, typename _OCat>
319  _GLIBCXX20_CONSTEXPR
320  ::__gnu_debug::_Safe_iterator<_OIte, _OSeq, _OCat>
321  __copy_move_a(
322  const ::__gnu_debug::_Safe_iterator<_IIte, _ISeq, _ICat>& __first,
323  const ::__gnu_debug::_Safe_iterator<_IIte, _ISeq, _ICat>& __last,
324  const ::__gnu_debug::_Safe_iterator<_OIte, _OSeq, _OCat>& __result)
325  {
326  typename ::__gnu_debug::_Distance_traits<_IIte>::__type __dist;
327  __glibcxx_check_valid_range2(__first, __last, __dist);
328  __glibcxx_check_can_increment_dist(__result, __dist, 1);
329 
330  if (__dist.second > ::__gnu_debug::__dp_equality)
331  {
332  if (__dist.second > ::__gnu_debug::__dp_sign
333  && __result._M_can_advance(__dist.first, true))
334  return ::__gnu_debug::_Safe_iterator<_OIte, _OSeq, _OCat>(
335  std::__copy_move_a<_IsMove>(__first.base(), __last.base(),
336  __result.base()),
337  __result._M_sequence);
338 
339  return std::__copy_move_a<_IsMove>(__first.base(), __last.base(),
340  __result);
341  }
342 
343  return std::__copy_move_a1<_IsMove>(__first, __last, __result);
344  }
345 
346  template<bool _IsMove,
347  typename _Ite, typename _Seq, typename _Cat, typename _OI>
348  _GLIBCXX20_CONSTEXPR
349  _OI
350  __copy_move_backward_a(
351  const ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>& __first,
352  const ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>& __last,
353  _OI __result)
354  {
355  typename ::__gnu_debug::_Distance_traits<_Ite>::__type __dist;
356  __glibcxx_check_valid_range2(__first, __last, __dist);
357  __glibcxx_check_can_increment_dist(__result, __dist, -1);
358 
359  if (__dist.second > ::__gnu_debug::__dp_equality)
360  return std::__copy_move_backward_a<_IsMove>(
361  __first.base(), __last.base(), __result);
362 
363  return std::__copy_move_backward_a1<_IsMove>(__first, __last, __result);
364  }
365 
366  template<bool _IsMove,
367  typename _II, typename _Ite, typename _Seq, typename _Cat>
368  _GLIBCXX20_CONSTEXPR
370  __copy_move_backward_a(_II __first, _II __last,
371  const ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>& __result)
372  {
373  typename ::__gnu_debug::_Distance_traits<_II>::__type __dist;
374  __glibcxx_check_valid_range2(__first, __last, __dist);
375  __glibcxx_check_can_increment_dist(__result, __dist, -1);
376 
377  if (__dist.second > ::__gnu_debug::__dp_sign
378  && __result._M_can_advance(-__dist.first, true))
379  return ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>(
380  std::__copy_move_backward_a<_IsMove>(__first, __last,
381  __result.base()),
382  __result._M_sequence);
383 
384  return std::__copy_move_backward_a1<_IsMove>(__first, __last, __result);
385  }
386 
387  template<bool _IsMove,
388  typename _IIte, typename _ISeq, typename _ICat,
389  typename _OIte, typename _OSeq, typename _OCat>
390  _GLIBCXX20_CONSTEXPR
391  ::__gnu_debug::_Safe_iterator<_OIte, _OSeq, _OCat>
392  __copy_move_backward_a(
393  const ::__gnu_debug::_Safe_iterator<_IIte, _ISeq, _ICat>& __first,
394  const ::__gnu_debug::_Safe_iterator<_IIte, _ISeq, _ICat>& __last,
395  const ::__gnu_debug::_Safe_iterator<_OIte, _OSeq, _OCat>& __result)
396  {
397  typename ::__gnu_debug::_Distance_traits<_IIte>::__type __dist;
398  __glibcxx_check_valid_range2(__first, __last, __dist);
399  __glibcxx_check_can_increment_dist(__result, __dist, -1);
400 
401  if (__dist.second > ::__gnu_debug::__dp_equality)
402  {
403  if (__dist.second > ::__gnu_debug::__dp_sign
404  && __result._M_can_advance(-__dist.first, true))
405  return ::__gnu_debug::_Safe_iterator<_OIte, _OSeq, _OCat>(
406  std::__copy_move_backward_a<_IsMove>(__first.base(), __last.base(),
407  __result.base()),
408  __result._M_sequence);
409 
410  return std::__copy_move_backward_a<_IsMove>(
411  __first.base(), __last.base(), __result);
412  }
413 
414  return std::__copy_move_backward_a1<_IsMove>(__first, __last, __result);
415  }
416 
417  template<typename _Ite, typename _Seq, typename _Cat, typename _Tp>
418  _GLIBCXX20_CONSTEXPR
419  void
420  __fill_a(const ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>& __first,
421  const ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>& __last,
422  const _Tp& __value)
423  {
424  typename ::__gnu_debug::_Distance_traits<_Ite>::__type __dist;
425  __glibcxx_check_valid_range2(__first, __last, __dist);
426 
427  if (__dist.second > ::__gnu_debug::__dp_equality)
428  std::__fill_a(__first.base(), __last.base(), __value);
429 
430  std::__fill_a1(__first, __last, __value);
431  }
432 
433  template<typename _Ite, typename _Seq, typename _Cat, typename _Size,
434  typename _Tp>
435  _GLIBCXX20_CONSTEXPR
436  ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>
437  __fill_n_a(const ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>& __first,
438  _Size __n, const _Tp& __value,
440  {
441 #if __cplusplus >= 201103L
442  static_assert(is_integral<_Size>{}, "fill_n must pass integral size");
443 #endif
444 
445  if (__n <= 0)
446  return __first;
447 
448  __glibcxx_check_can_increment(__first, __n);
449  if (__first._M_can_advance(__n, true))
450  return ::__gnu_debug::_Safe_iterator<_Ite, _Seq, _Cat>(
451  std::__fill_n_a(__first.base(), __n, __value, _Cat()),
452  __first._M_sequence);
453 
454  return std::__fill_n_a1(__first, __n, __value);
455  }
456 
457  template<typename _II1, typename _Seq1, typename _Cat1, typename _II2>
458  _GLIBCXX20_CONSTEXPR
459  bool
460  __equal_aux(
461  const ::__gnu_debug::_Safe_iterator<_II1, _Seq1, _Cat1>& __first1,
462  const ::__gnu_debug::_Safe_iterator<_II1, _Seq1, _Cat1>& __last1,
463  _II2 __first2)
464  {
465  typename ::__gnu_debug::_Distance_traits<_II1>::__type __dist;
466  __glibcxx_check_valid_range2(__first1, __last1, __dist);
467  __glibcxx_check_can_increment_dist(__first2, __dist, 1);
468 
469  if (__dist.second > ::__gnu_debug::__dp_equality)
470  return std::__equal_aux(__first1.base(), __last1.base(), __first2);
471 
472  return std::__equal_aux1(__first1, __last1, __first2);
473  }
474 
475  template<typename _II1, typename _II2, typename _Seq2, typename _Cat2>
476  _GLIBCXX20_CONSTEXPR
477  bool
478  __equal_aux(_II1 __first1, _II1 __last1,
479  const ::__gnu_debug::_Safe_iterator<_II2, _Seq2, _Cat2>& __first2)
480  {
481  typename ::__gnu_debug::_Distance_traits<_II1>::__type __dist;
482  __glibcxx_check_valid_range2(__first1, __last1, __dist);
483  __glibcxx_check_can_increment_dist(__first2, __dist, 1);
484 
485  if (__dist.second > ::__gnu_debug::__dp_sign
486  && __first2._M_can_advance(__dist.first, true))
487  return std::__equal_aux(__first1, __last1, __first2.base());
488 
489  return std::__equal_aux1(__first1, __last1, __first2);
490  }
491 
492  template<typename _II1, typename _Seq1, typename _Cat1,
493  typename _II2, typename _Seq2, typename _Cat2>
494  _GLIBCXX20_CONSTEXPR
495  bool
496  __equal_aux(
497  const ::__gnu_debug::_Safe_iterator<_II1, _Seq1, _Cat1>& __first1,
498  const ::__gnu_debug::_Safe_iterator<_II1, _Seq1, _Cat1>& __last1,
499  const ::__gnu_debug::_Safe_iterator<_II2, _Seq2, _Cat2>& __first2)
500  {
501  typename ::__gnu_debug::_Distance_traits<_II1>::__type __dist;
502  __glibcxx_check_valid_range2(__first1, __last1, __dist);
503  __glibcxx_check_can_increment_dist(__first2, __dist, 1);
504 
505  if (__dist.second > ::__gnu_debug::__dp_equality)
506  {
507  if (__dist.second > ::__gnu_debug::__dp_sign &&
508  __first2._M_can_advance(__dist.first, true))
509  return std::__equal_aux(__first1.base(), __last1.base(),
510  __first2.base());
511  return std::__equal_aux(__first1.base(), __last1.base(), __first2);
512  }
513 
514  return __equal_aux1(__first1, __last1, __first2);
515  }
516 
517  template<typename _Ite1, typename _Seq1, typename _Cat1,
518  typename _II2>
519  _GLIBCXX20_CONSTEXPR
520  bool
521  __lexicographical_compare_aux(
522  const ::__gnu_debug::_Safe_iterator<_Ite1, _Seq1, _Cat1>& __first1,
523  const ::__gnu_debug::_Safe_iterator<_Ite1, _Seq1, _Cat1>& __last1,
524  _II2 __first2, _II2 __last2)
525  {
526  typename ::__gnu_debug::_Distance_traits<_Ite1>::__type __dist1;
527  __glibcxx_check_valid_range2(__first1, __last1, __dist1);
528  __glibcxx_check_valid_range(__first2, __last2);
529 
530  if (__dist1.second > ::__gnu_debug::__dp_equality)
531  return std::__lexicographical_compare_aux(__first1.base(),
532  __last1.base(),
533  __first2, __last2);
534  return std::__lexicographical_compare_aux1(__first1, __last1,
535  __first2, __last2);
536  }
537 
538  template<typename _II1,
539  typename _Ite2, typename _Seq2, typename _Cat2>
540  _GLIBCXX20_CONSTEXPR
541  bool
542  __lexicographical_compare_aux(
543  _II1 __first1, _II1 __last1,
544  const ::__gnu_debug::_Safe_iterator<_Ite2, _Seq2, _Cat2>& __first2,
545  const ::__gnu_debug::_Safe_iterator<_Ite2, _Seq2, _Cat2>& __last2)
546  {
547  __glibcxx_check_valid_range(__first1, __last1);
548  typename ::__gnu_debug::_Distance_traits<_II1>::__type __dist2;
549  __glibcxx_check_valid_range2(__first2, __last2, __dist2);
550 
551  if (__dist2.second > ::__gnu_debug::__dp_equality)
552  return std::__lexicographical_compare_aux(__first1, __last1,
553  __first2.base(),
554  __last2.base());
555  return std::__lexicographical_compare_aux1(__first1, __last1,
556  __first2, __last2);
557  }
558 
559  template<typename _Ite1, typename _Seq1, typename _Cat1,
560  typename _Ite2, typename _Seq2, typename _Cat2>
561  _GLIBCXX20_CONSTEXPR
562  bool
563  __lexicographical_compare_aux(
564  const ::__gnu_debug::_Safe_iterator<_Ite1, _Seq1, _Cat1>& __first1,
565  const ::__gnu_debug::_Safe_iterator<_Ite1, _Seq1, _Cat1>& __last1,
566  const ::__gnu_debug::_Safe_iterator<_Ite2, _Seq2, _Cat2>& __first2,
567  const ::__gnu_debug::_Safe_iterator<_Ite2, _Seq2, _Cat2>& __last2)
568  {
569  typename ::__gnu_debug::_Distance_traits<_Ite1>::__type __dist1;
570  __glibcxx_check_valid_range2(__first1, __last1, __dist1);
571  typename ::__gnu_debug::_Distance_traits<_Ite2>::__type __dist2;
572  __glibcxx_check_valid_range2(__first2, __last2, __dist2);
573 
574  if (__dist1.second > ::__gnu_debug::__dp_equality)
575  {
576  if (__dist2.second > ::__gnu_debug::__dp_equality)
577  return std::__lexicographical_compare_aux(__first1.base(),
578  __last1.base(),
579  __first2.base(),
580  __last2.base());
581  return std::__lexicographical_compare_aux(__first1.base(),
582  __last1.base(),
583  __first2, __last2);
584  }
585 
586  if (__dist2.second > ::__gnu_debug::__dp_equality)
587  return std::__lexicographical_compare_aux(__first1, __last1,
588  __first2.base(),
589  __last2.base());
590  return std::__lexicographical_compare_aux1(__first1, __last1,
591  __first2, __last2);
592  }
593 
594 _GLIBCXX_END_NAMESPACE_VERSION
595 } // namespace std
596 
597 #endif
_Tp * end(valarray< _Tp > &__va) noexcept
Return an iterator pointing to one past the last element of the valarray.
Definition: valarray:1251
_Tp * begin(valarray< _Tp > &__va) noexcept
Return an iterator pointing to the first element of the valarray.
Definition: valarray:1229
ISO C++ entities toplevel namespace is std.
GNU debug classes for public use.
constexpr _Distance_traits< _Iterator >::__type __get_distance(_Iterator __lhs, _Iterator __rhs, std::random_access_iterator_tag)
Safe iterator wrapper.
Struct holding two objects of arbitrary type.
Definition: stl_pair.h:304
_T1 first
The first member.
Definition: stl_pair.h:308
_T2 second
The second member.
Definition: stl_pair.h:309
Marking input iterators.
Random-access iterators support a superset of bidirectional iterator operations.