libstdc++
safe_local_iterator.tcc
Go to the documentation of this file.
1// Debugging iterator implementation (out of line) -*- C++ -*-
2
3// Copyright (C) 2011-2016 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
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/>.
24
25/** @file debug/safe_local_iterator.tcc
26 * This file is a GNU debug extension to the Standard C++ Library.
27 */
28
29#ifndef _GLIBCXX_DEBUG_SAFE_LOCAL_ITERATOR_TCC
30#define _GLIBCXX_DEBUG_SAFE_LOCAL_ITERATOR_TCC 1
31
32namespace __gnu_debug
33{
34 template<typename _Iterator, typename _Sequence>
35 bool
36 _Safe_local_iterator<_Iterator, _Sequence>::
37 _M_valid_range(const _Safe_local_iterator& __rhs,
39 {
40 if (!_M_can_compare(__rhs))
41 return false;
42
43 if (bucket() != __rhs.bucket())
44 return false;
45
46 /* Determine if we can order the iterators without the help of
47 the container */
48 __dist = __get_distance(*this, __rhs);
49 switch (__dist.second)
50 {
51 case __dp_equality:
52 if (__dist.first == 0)
53 return true;
54 break;
55
56 case __dp_sign:
57 case __dp_exact:
58 return __dist.first >= 0;
59 }
60
61 // Assume that this is a valid range; we can't check anything else
62 return true;
63 }
64} // namespace __gnu_debug
65
66#endif
GNU debug classes for public use.
_Distance_traits< _Iterator >::__type __get_distance(const _Iterator &__lhs, const _Iterator &__rhs, std::random_access_iterator_tag)