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<div class="title">safe_iterator.tcc</div> </div>
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<a href="a01490.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Debugging iterator implementation (out of line) -*- C++ -*-</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright (C) 2003-2013 Free Software Foundation, Inc.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// software; you can redistribute it and/or modify it under the</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// terms of the GNU General Public License as published by the</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// any later version.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// This library is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// GNU General Public License for more details.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// You should have received a copy of the GNU General Public License and</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"></span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/** @file debug/safe_iterator.tcc</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * This file is a GNU debug extension to the Standard C++ Library.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#ifndef _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor"></span><span class="preprocessor">#define _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC 1</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">namespace </span>__gnu_debug</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> {</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Iterator, <span class="keyword">typename</span> _Sequence></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordtype">bool</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  _Safe_iterator<_Iterator, _Sequence>::</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  _M_can_advance(<span class="keyword">const</span> difference_type& __n)<span class="keyword"> const</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword"> </span>{</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> _Sequence::const_iterator const_debug_iterator;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> const_debug_iterator::iterator_type const_iterator;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">if</span> (this->_M_singular())</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">if</span> (__n == 0)</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">if</span> (__n < 0)</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  const_iterator __begin = _M_get_sequence()->_M_base().begin();</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="a00470.html">std::pair<difference_type, _Distance_precision></a> __dist =</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <a class="code" href="a01653.html#a4ca7ea645540f18e86d9b560c614d0e5">__get_distance</a>(__begin, base());</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">bool</span> __ok = ((__dist.<a class="code" href="a00470.html#a91179413226db12e66346d3673b7835f">second</a> == __dp_exact && __dist.<a class="code" href="a00470.html#a198b03cffc037835dc1dc01c926ce251">first</a> >= -__n)</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  || (__dist.<a class="code" href="a00470.html#a91179413226db12e66346d3673b7835f">second</a> != __dp_exact && __dist.<a class="code" href="a00470.html#a198b03cffc037835dc1dc01c926ce251">first</a> > 0));</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">return</span> __ok;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  }</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  {</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  const_iterator __end = _M_get_sequence()->_M_base().end();</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <a class="code" href="a00470.html">std::pair<difference_type, _Distance_precision></a> __dist =</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="a01653.html#a4ca7ea645540f18e86d9b560c614d0e5">__get_distance</a>(base(), __end);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordtype">bool</span> __ok = ((__dist.<a class="code" href="a00470.html#a91179413226db12e66346d3673b7835f">second</a> == __dp_exact && __dist.<a class="code" href="a00470.html#a198b03cffc037835dc1dc01c926ce251">first</a> >= __n)</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  || (__dist.<a class="code" href="a00470.html#a91179413226db12e66346d3673b7835f">second</a> != __dp_exact && __dist.<a class="code" href="a00470.html#a198b03cffc037835dc1dc01c926ce251">first</a> > 0));</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">return</span> __ok;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  }</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Iterator, <span class="keyword">typename</span> _Sequence></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Other></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordtype">bool</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  _Safe_iterator<_Iterator, _Sequence>::</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  _M_valid_range(<span class="keyword">const</span> _Safe_iterator<_Other, _Sequence>& __rhs)<span class="keyword"> const</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="keyword"> </span>{</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">if</span> (!_M_can_compare(__rhs))</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">/* Determine if we can order the iterators without the help of</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> the container */</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <a class="code" href="a00470.html">std::pair<difference_type, _Distance_precision></a> __dist =</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <a class="code" href="a01653.html#a4ca7ea645540f18e86d9b560c614d0e5">__get_distance</a>(base(), __rhs.base());</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">switch</span> (__dist.<a class="code" href="a00470.html#a91179413226db12e66346d3673b7835f">second</a>) {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">case</span> __dp_equality:</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">if</span> (__dist.<a class="code" href="a00470.html#a198b03cffc037835dc1dc01c926ce251">first</a> == 0)</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">case</span> __dp_sign:</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">case</span> __dp_exact:</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">return</span> __dist.<a class="code" href="a00470.html#a198b03cffc037835dc1dc01c926ce251">first</a> >= 0;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="comment">/* We can only test for equality, but check if one of the</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> iterators is at an extreme. */</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">/* Optim for classic [begin, it) or [it, end) ranges, limit checks</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> * when code is valid. Note, for the special case of forward_list,</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> * before_begin replaces the role of begin. */</span> </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">if</span> (_M_is_beginnest() || __rhs._M_is_end())</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">if</span> (_M_is_end() || __rhs._M_is_beginnest())</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="comment">// Assume that this is a valid range; we can't check anything else</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  }</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> } <span class="comment">// namespace __gnu_debug</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="preprocessor"></span></div>
<div class="ttc" id="a00470_html_a198b03cffc037835dc1dc01c926ce251"><div class="ttname"><a href="a00470.html#a198b03cffc037835dc1dc01c926ce251">std::pair::first</a></div><div class="ttdeci">_T1 first</div><div class="ttdoc">second_type is the second bound type </div><div class="ttdef"><b>Definition:</b> <a href="a01561_source.html#l00101">stl_pair.h:101</a></div></div>
<div class="ttc" id="a01653_html_a4ca7ea645540f18e86d9b560c614d0e5"><div class="ttname"><a href="a01653.html#a4ca7ea645540f18e86d9b560c614d0e5">__gnu_debug::__get_distance</a></div><div class="ttdeci">std::pair< typename std::iterator_traits< _Iterator1 >::difference_type, _Distance_precision > __get_distance(const _Iterator1 &__lhs, const _Iterator2 &__rhs, std::random_access_iterator_tag)</div><div class="ttdef"><b>Definition:</b> <a href="a01489_source.html#l00083">safe_iterator.h:83</a></div></div>
<div class="ttc" id="a00470_html"><div class="ttname"><a href="a00470.html">std::pair</a></div><div class="ttdoc">Struct holding two objects of arbitrary type. </div><div class="ttdef"><b>Definition:</b> <a href="a01561_source.html#l00096">stl_pair.h:96</a></div></div>
<div class="ttc" id="a00470_html_a91179413226db12e66346d3673b7835f"><div class="ttname"><a href="a00470.html#a91179413226db12e66346d3673b7835f">std::pair::second</a></div><div class="ttdeci">_T2 second</div><div class="ttdoc">first is a copy of the first object </div><div class="ttdef"><b>Definition:</b> <a href="a01561_source.html#l00102">stl_pair.h:102</a></div></div>
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