libstdc++
iterator_tracker.h
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1 // Profiling iterator implementation -*- C++ -*-
2 
3 // Copyright (C) 2009-2017 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 profile/iterator_tracker.h
26  * This file is a GNU profile extension to the Standard C++ Library.
27  */
28 
29 #ifndef _GLIBCXX_PROFILE_ITERATOR_TRACKER
30 #define _GLIBCXX_PROFILE_ITERATOR_TRACKER 1
31 
32 #include <ext/type_traits.h>
33 
34 namespace std _GLIBCXX_VISIBILITY(default)
35 {
36 namespace __profile
37 {
38  template<typename _Iterator, typename _Sequence>
39  class __iterator_tracker
40  {
41  typedef __iterator_tracker _Self;
42 
43  // The underlying iterator
44  _Iterator _M_current;
45 
46  // The underlying data structure
47  const _Sequence* _M_ds;
48  typedef std::iterator_traits<_Iterator> _Traits;
49 
50  public:
51  typedef _Iterator _Base_iterator;
52  typedef typename _Traits::iterator_category iterator_category;
53  typedef typename _Traits::value_type value_type;
54  typedef typename _Traits::difference_type difference_type;
55  typedef typename _Traits::reference reference;
56  typedef typename _Traits::pointer pointer;
57 
58  __iterator_tracker() _GLIBCXX_NOEXCEPT
59  : _M_current(), _M_ds(0) { }
60 
61  __iterator_tracker(const _Iterator& __i, const _Sequence* __seq)
62  _GLIBCXX_NOEXCEPT
63  : _M_current(__i), _M_ds(__seq) { }
64 
65  __iterator_tracker(const __iterator_tracker& __x) _GLIBCXX_NOEXCEPT
66  : _M_current(__x._M_current), _M_ds(__x._M_ds) { }
67 
68  template<typename _MutableIterator>
69  __iterator_tracker(const __iterator_tracker<_MutableIterator,
70  typename __gnu_cxx::__enable_if
71  <(std::__are_same<_MutableIterator, typename
72  _Sequence::iterator::_Base_iterator>::__value),
73  _Sequence>::__type>& __x) _GLIBCXX_NOEXCEPT
74  : _M_current(__x.base()), _M_ds(__x._M_get_sequence()) { }
75 
76  _Iterator
77  base() const _GLIBCXX_NOEXCEPT { return _M_current; }
78 
79  /**
80  * @brief Conversion to underlying non-debug iterator to allow
81  * better interaction with non-profile containers.
82  */
83  operator _Iterator() const _GLIBCXX_NOEXCEPT { return _M_current; }
84 
85  pointer
86  operator->() const _GLIBCXX_NOEXCEPT { return &*_M_current; }
87 
88  __iterator_tracker&
89  operator++() _GLIBCXX_NOEXCEPT
90  {
91  _M_ds->_M_profile_iterate();
92  ++_M_current;
93  return *this;
94  }
95 
96  __iterator_tracker
97  operator++(int) _GLIBCXX_NOEXCEPT
98  {
99  _M_ds->_M_profile_iterate();
100  __iterator_tracker __tmp(*this);
101  ++_M_current;
102  return __tmp;
103  }
104 
105  __iterator_tracker&
106  operator--() _GLIBCXX_NOEXCEPT
107  {
108  _M_ds->_M_profile_iterate(1);
109  --_M_current;
110  return *this;
111  }
112 
113  __iterator_tracker
114  operator--(int) _GLIBCXX_NOEXCEPT
115  {
116  _M_ds->_M_profile_iterate(1);
117  __iterator_tracker __tmp(*this);
118  --_M_current;
119  return __tmp;
120  }
121 
122  __iterator_tracker&
123  operator=(const __iterator_tracker& __x) _GLIBCXX_NOEXCEPT
124  {
125  _M_current = __x._M_current;
126  _M_ds = __x._M_ds;
127  return *this;
128  }
129 
130  reference
131  operator*() const _GLIBCXX_NOEXCEPT
132  { return *_M_current; }
133 
134  // ------ Random access iterator requirements ------
135  reference
136  operator[](const difference_type& __n) const _GLIBCXX_NOEXCEPT
137  { return _M_current[__n]; }
138 
139  __iterator_tracker&
140  operator+=(const difference_type& __n) _GLIBCXX_NOEXCEPT
141  {
142  _M_current += __n;
143  return *this;
144  }
145 
146  __iterator_tracker
147  operator+(const difference_type& __n) const _GLIBCXX_NOEXCEPT
148  {
149  __iterator_tracker __tmp(*this);
150  __tmp += __n;
151  return __tmp;
152  }
153 
154  __iterator_tracker&
155  operator-=(const difference_type& __n) _GLIBCXX_NOEXCEPT
156  {
157  _M_current += -__n;
158  return *this;
159  }
160 
161  __iterator_tracker
162  operator-(const difference_type& __n) const _GLIBCXX_NOEXCEPT
163  {
164  __iterator_tracker __tmp(*this);
165  __tmp -= __n;
166  return __tmp;
167  }
168 
169  const _Sequence*
170  _M_get_sequence() const
171  { return static_cast<const _Sequence*>(_M_ds); }
172  };
173 
174  template<typename _IteratorL, typename _IteratorR, typename _Sequence>
175  inline bool
176  operator==(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
177  const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
178  _GLIBCXX_NOEXCEPT
179  { return __lhs.base() == __rhs.base(); }
180 
181  template<typename _Iterator, typename _Sequence>
182  inline bool
183  operator==(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
184  const __iterator_tracker<_Iterator, _Sequence>& __rhs)
185  _GLIBCXX_NOEXCEPT
186  { return __lhs.base() == __rhs.base(); }
187 
188  template<typename _IteratorL, typename _IteratorR, typename _Sequence>
189  inline bool
190  operator!=(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
191  const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
192  _GLIBCXX_NOEXCEPT
193  { return __lhs.base() != __rhs.base(); }
194 
195  template<typename _Iterator, typename _Sequence>
196  inline bool
197  operator!=(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
198  const __iterator_tracker<_Iterator, _Sequence>& __rhs)
199  _GLIBCXX_NOEXCEPT
200  { return __lhs.base() != __rhs.base(); }
201 
202  template<typename _IteratorL, typename _IteratorR, typename _Sequence>
203  inline bool
204  operator<(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
205  const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
206  _GLIBCXX_NOEXCEPT
207  { return __lhs.base() < __rhs.base(); }
208 
209  template<typename _Iterator, typename _Sequence>
210  inline bool
211  operator<(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
212  const __iterator_tracker<_Iterator, _Sequence>& __rhs)
213  _GLIBCXX_NOEXCEPT
214  { return __lhs.base() < __rhs.base(); }
215 
216  template<typename _IteratorL, typename _IteratorR, typename _Sequence>
217  inline bool
218  operator<=(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
219  const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
220  _GLIBCXX_NOEXCEPT
221  { return __lhs.base() <= __rhs.base(); }
222 
223  template<typename _Iterator, typename _Sequence>
224  inline bool
225  operator<=(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
226  const __iterator_tracker<_Iterator, _Sequence>& __rhs)
227  _GLIBCXX_NOEXCEPT
228  { return __lhs.base() <= __rhs.base(); }
229 
230  template<typename _IteratorL, typename _IteratorR, typename _Sequence>
231  inline bool
232  operator>(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
233  const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
234  _GLIBCXX_NOEXCEPT
235  { return __lhs.base() > __rhs.base(); }
236 
237  template<typename _Iterator, typename _Sequence>
238  inline bool
239  operator>(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
240  const __iterator_tracker<_Iterator, _Sequence>& __rhs)
241  _GLIBCXX_NOEXCEPT
242  { return __lhs.base() > __rhs.base(); }
243 
244  template<typename _IteratorL, typename _IteratorR, typename _Sequence>
245  inline bool
246  operator>=(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
247  const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
248  _GLIBCXX_NOEXCEPT
249  { return __lhs.base() >= __rhs.base(); }
250 
251  template<typename _Iterator, typename _Sequence>
252  inline bool
253  operator>=(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
254  const __iterator_tracker<_Iterator, _Sequence>& __rhs)
255  _GLIBCXX_NOEXCEPT
256  { return __lhs.base() >= __rhs.base(); }
257 
258  // _GLIBCXX_RESOLVE_LIB_DEFECTS
259  // According to the resolution of DR179 not only the various comparison
260  // operators but also operator- must accept mixed iterator/const_iterator
261  // parameters.
262  template<typename _IteratorL, typename _IteratorR, typename _Sequence>
263  inline typename __iterator_tracker<_IteratorL, _Sequence>::difference_type
264  operator-(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
265  const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
266  _GLIBCXX_NOEXCEPT
267  { return __lhs.base() - __rhs.base(); }
268 
269  template<typename _Iterator, typename _Sequence>
270  inline typename __iterator_tracker<_Iterator, _Sequence>::difference_type
271  operator-(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
272  const __iterator_tracker<_Iterator, _Sequence>& __rhs)
273  _GLIBCXX_NOEXCEPT
274  { return __lhs.base() - __rhs.base(); }
275 
276  template<typename _Iterator, typename _Sequence>
277  inline __iterator_tracker<_Iterator, _Sequence>
278  operator+(typename __iterator_tracker<_Iterator,_Sequence>::difference_type
279  __n,
280  const __iterator_tracker<_Iterator, _Sequence>& __i)
281  _GLIBCXX_NOEXCEPT
282  { return __i + __n; }
283 
284 } // namespace __profile
285 } // namespace std
286 #endif
std
ISO C++ entities toplevel namespace is std.
std::operator*
complex< _Tp > operator*(const complex< _Tp > &__x, const complex< _Tp > &__y)
Return new complex value x times y.
Definition: complex:386