1 // Debugging support implementation -*- C++ -*- 2 3 // Copyright (C) 2015-2019 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/stl_iterator.h 26 * This file is a GNU debug extension to the Standard C++ Library. 27 */ 28 29 #ifndef _GLIBCXX_DEBUG_STL_ITERATOR_H 30 #define _GLIBCXX_DEBUG_STL_ITERATOR_H 1 31 32 #include <debug/helper_functions.h> 33 34 namespace __gnu_debug 35 { 36 // Help Debug mode to see through reverse_iterator. 37 template<typename _Iterator> 38 inline bool __valid_range(const std::reverse_iterator<_Iterator> & __first,const std::reverse_iterator<_Iterator> & __last,typename _Distance_traits<_Iterator>::__type & __dist)39 __valid_range(const std::reverse_iterator<_Iterator>& __first, 40 const std::reverse_iterator<_Iterator>& __last, 41 typename _Distance_traits<_Iterator>::__type& __dist) 42 { return __valid_range(__last.base(), __first.base(), __dist); } 43 44 template<typename _Iterator> 45 inline typename _Distance_traits<_Iterator>::__type __get_distance(const std::reverse_iterator<_Iterator> & __first,const std::reverse_iterator<_Iterator> & __last)46 __get_distance(const std::reverse_iterator<_Iterator>& __first, 47 const std::reverse_iterator<_Iterator>& __last) 48 { return __get_distance(__last.base(), __first.base()); } 49 50 template<typename _Iterator, typename _Size> 51 inline bool __can_advance(const std::reverse_iterator<_Iterator> & __it,_Size __n)52 __can_advance(const std::reverse_iterator<_Iterator>& __it, _Size __n) 53 { return __can_advance(__it.base(), -__n); } 54 55 template<typename _Iterator, typename _Sequence> 56 inline std::reverse_iterator<_Iterator> __base(const std::reverse_iterator<_Safe_iterator<_Iterator,_Sequence,std::random_access_iterator_tag>> & __it)57 __base(const std::reverse_iterator<_Safe_iterator< 58 _Iterator, _Sequence, std::random_access_iterator_tag> >& __it) 59 { return std::reverse_iterator<_Iterator>(__it.base().base()); } 60 61 #if __cplusplus < 201103L 62 template<typename _Iterator> 63 struct _Unsafe_type<std::reverse_iterator<_Iterator> > 64 { 65 typedef typename _Unsafe_type<_Iterator>::_Type _UnsafeType; 66 typedef std::reverse_iterator<_UnsafeType> _Type; 67 }; 68 69 template<typename _Iterator> 70 inline std::reverse_iterator<typename _Unsafe_type<_Iterator>::_Type> 71 __unsafe(const std::reverse_iterator<_Iterator>& __it) 72 { 73 typedef typename _Unsafe_type<_Iterator>::_Type _UnsafeType; 74 return std::reverse_iterator<_UnsafeType>(__unsafe(__it.base())); 75 } 76 #else 77 template<typename _Iterator> 78 inline auto 79 __unsafe(const std::reverse_iterator<_Iterator>& __it) 80 -> decltype(std::__make_reverse_iterator(__unsafe(__it.base()))) 81 { return std::__make_reverse_iterator(__unsafe(__it.base())); } 82 #endif 83 84 #if __cplusplus >= 201103L 85 // Help Debug mode to see through move_iterator. 86 template<typename _Iterator> 87 inline bool 88 __valid_range(const std::move_iterator<_Iterator>& __first, 89 const std::move_iterator<_Iterator>& __last, 90 typename _Distance_traits<_Iterator>::__type& __dist) 91 { return __valid_range(__first.base(), __last.base(), __dist); } 92 93 template<typename _Iterator> 94 inline typename _Distance_traits<_Iterator>::__type 95 __get_distance(const std::move_iterator<_Iterator>& __first, 96 const std::move_iterator<_Iterator>& __last) 97 { return __get_distance(__first.base(), __last.base()); } 98 99 template<typename _Iterator, typename _Size> 100 inline bool 101 __can_advance(const std::move_iterator<_Iterator>& __it, _Size __n) 102 { return __can_advance(__it.base(), __n); } 103 104 template<typename _Iterator> 105 inline auto 106 __unsafe(const std::move_iterator<_Iterator>& __it) 107 -> decltype(std::make_move_iterator(__unsafe(__it.base()))) 108 { return std::make_move_iterator(__unsafe(__it.base())); } 109 110 template<typename _Iterator> 111 inline auto 112 __base(const std::move_iterator<_Iterator>& __it) 113 -> decltype(std::make_move_iterator(__base(__it.base()))) 114 { return std::make_move_iterator(__base(__it.base())); } 115 #endif 116 } 117 118 namespace std 119 { 120 _GLIBCXX_BEGIN_NAMESPACE_VERSION 121 122 template<typename _Iterator, typename _Container, typename _Sequence> 123 _Iterator 124 __niter_base(const __gnu_debug::_Safe_iterator< 125 __gnu_cxx::__normal_iterator<_Iterator, _Container>, 126 _Sequence, std::random_access_iterator_tag>&); 127 128 _GLIBCXX_END_NAMESPACE_VERSION 129 } 130 131 #endif 132