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<a href="a00473.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">// class template regex -*- 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) 2013-2018 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">/**</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * @file bits/regex_automaton.tcc</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * This is an internal header file, included by other library headers.</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * Do not attempt to use it directly. @headername{regex}</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> */</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">namespace </span><a class="code" href="a01538.html">std</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> {</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">namespace </span>__detail</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> {</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#ifdef _GLIBCXX_DEBUG</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">inline</span> <a class="code" href="a02460.html">std::ostream</a>&</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  _State_base::_M_print(<a class="code" href="a02460.html">std::ostream</a>& ostr)<span class="keyword"> const</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">switch</span> (_M_opcode)</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  {</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">case</span> _S_opcode_alternative:</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">case</span> _S_opcode_repeat:</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  ostr << <span class="stringliteral">"alt next="</span> << _M_next << <span class="stringliteral">" alt="</span> << _M_alt;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">case</span> _S_opcode_subexpr_begin:</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  ostr << <span class="stringliteral">"subexpr begin next="</span> << _M_next << <span class="stringliteral">" index="</span> << _M_subexpr;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">case</span> _S_opcode_subexpr_end:</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  ostr << <span class="stringliteral">"subexpr end next="</span> << _M_next << <span class="stringliteral">" index="</span> << _M_subexpr;</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">case</span> _S_opcode_backref:</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  ostr << <span class="stringliteral">"backref next="</span> << _M_next << <span class="stringliteral">" index="</span> << _M_backref_index;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">case</span> _S_opcode_match:</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  ostr << <span class="stringliteral">"match next="</span> << _M_next;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">case</span> _S_opcode_accept:</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  ostr << <span class="stringliteral">"accept next="</span> << _M_next;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  ostr << <span class="stringliteral">"unknown next="</span> << _M_next;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">break</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="keywordflow">return</span> ostr;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  }</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// Prints graphviz dot commands for state.</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">inline</span> <a class="code" href="a02460.html">std::ostream</a>&</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  _State_base::_M_dot(<a class="code" href="a02460.html">std::ostream</a>& __ostr, _StateIdT __id)<span class="keyword"> const</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">switch</span> (_M_opcode)</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="keywordflow">case</span> _S_opcode_alternative:</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">case</span> _S_opcode_repeat:</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nALT\"];\n"</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  << __id << <span class="stringliteral">" -> "</span> << _M_next</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  << <span class="stringliteral">" [label=\"next\", tailport=\"s\"];\n"</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  << __id << <span class="stringliteral">" -> "</span> << _M_alt</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  << <span class="stringliteral">" [label=\"alt\", tailport=\"n\"];\n"</span>;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">case</span> _S_opcode_backref:</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nBACKREF "</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  << _M_subexpr << <span class="stringliteral">"\"];\n"</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  << __id << <span class="stringliteral">" -> "</span> << _M_next << <span class="stringliteral">" [label=\"<match>\"];\n"</span>;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">case</span> _S_opcode_line_begin_assertion:</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nLINE_BEGIN \"];\n"</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  << __id << <span class="stringliteral">" -> "</span> << _M_next << <span class="stringliteral">" [label=\"epsilon\"];\n"</span>;</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">case</span> _S_opcode_line_end_assertion:</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nLINE_END \"];\n"</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  << __id << <span class="stringliteral">" -> "</span> << _M_next << <span class="stringliteral">" [label=\"epsilon\"];\n"</span>;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">case</span> _S_opcode_word_boundary:</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nWORD_BOUNDRY "</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  << _M_neg << <span class="stringliteral">"\"];\n"</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  << __id << <span class="stringliteral">" -> "</span> << _M_next << <span class="stringliteral">" [label=\"epsilon\"];\n"</span>;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">case</span> _S_opcode_subexpr_lookahead:</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nLOOK_AHEAD\"];\n"</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  << __id << <span class="stringliteral">" -> "</span> << _M_next</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  << <span class="stringliteral">" [label=\"epsilon\", tailport=\"s\"];\n"</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  << __id << <span class="stringliteral">" -> "</span> << _M_alt</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  << <span class="stringliteral">" [label=\"<assert>\", tailport=\"n\"];\n"</span>;</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">case</span> _S_opcode_subexpr_begin:</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nSBEGIN "</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  << _M_subexpr << <span class="stringliteral">"\"];\n"</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  << __id << <span class="stringliteral">" -> "</span> << _M_next << <span class="stringliteral">" [label=\"epsilon\"];\n"</span>;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">case</span> _S_opcode_subexpr_end:</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nSEND "</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  << _M_subexpr << <span class="stringliteral">"\"];\n"</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  << __id << <span class="stringliteral">" -> "</span> << _M_next << <span class="stringliteral">" [label=\"epsilon\"];\n"</span>;</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">case</span> _S_opcode_dummy:</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">case</span> _S_opcode_match:</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nMATCH\"];\n"</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  << __id << <span class="stringliteral">" -> "</span> << _M_next << <span class="stringliteral">" [label=\"<match>\"];\n"</span>;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">case</span> _S_opcode_accept:</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  __ostr << __id << <span class="stringliteral">" [label=\""</span> << __id << <span class="stringliteral">"\\nACC\"];\n"</span> ;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  _GLIBCXX_DEBUG_ASSERT(<span class="keyword">false</span>);</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">return</span> __ostr;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  }</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _TraitsT></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <a class="code" href="a02460.html">std::ostream</a>&</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  _NFA<_TraitsT>::_M_dot(<a class="code" href="a02460.html">std::ostream</a>& __ostr)<span class="keyword"> const</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  __ostr << <span class="stringliteral">"digraph _Nfa {\n"</span></div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="stringliteral">" rankdir=LR;\n"</span>;</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> __i = 0; __i < this->size(); ++__i)</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  (*<span class="keyword">this</span>)[__i]._M_dot(__ostr, __i);</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  __ostr << <span class="stringliteral">"}\n"</span>;</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">return</span> __ostr;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  }</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _TraitsT></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  _StateIdT</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  _NFA<_TraitsT>::_M_insert_backref(<span class="keywordtype">size_t</span> __index)</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  {</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span> (this->_M_flags & <a class="code" href="a01564.html#a5beb02024da71cad08b124851240493a">regex_constants::__polynomial</a>)</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  __throw_regex_error(<a class="code" href="a01564.html#acdf6decf6d03ea2275dcec3961719d9a">regex_constants::error_complexity</a>,</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="stringliteral">"Unexpected back-reference in polynomial mode."</span>);</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// To figure out whether a backref is valid, a stack is used to store</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="comment">// unfinished sub-expressions. For example, when parsing</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="comment">// "(a(b)(c\\1(d)))" at '\\1', _M_subexpr_count is 3, indicating that 3</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="comment">// sub expressions are parsed or partially parsed(in the stack), aka,</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">// "(a..", "(b)" and "(c..").</span></div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="comment">// _M_paren_stack is {1, 3}, for incomplete "(a.." and "(c..". At this</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="comment">// time, "\\2" is valid, but "\\1" and "\\3" are not.</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span> (__index >= _M_subexpr_count)</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  __throw_regex_error(</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <a class="code" href="a01564.html#acc0f88e638558f5c3bb64ea44832493b">regex_constants::error_backref</a>,</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="stringliteral">"Back-reference index exceeds current sub-expression count."</span>);</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> __it : this->_M_paren_stack)</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span> (__index == __it)</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  __throw_regex_error(</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <a class="code" href="a01564.html#acc0f88e638558f5c3bb64ea44832493b">regex_constants::error_backref</a>,</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="stringliteral">"Back-reference referred to an opened sub-expression."</span>);</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  this->_M_has_backref = <span class="keyword">true</span>;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  _StateT __tmp(_S_opcode_backref);</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  __tmp._M_backref_index = __index;</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> _M_insert_state(std::move(__tmp));</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _TraitsT></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  _NFA<_TraitsT>::_M_eliminate_dummy()</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  {</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span>& __it : *<span class="keyword">this</span>)</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  {</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">while</span> (__it._M_next >= 0 && (*<span class="keyword">this</span>)[__it._M_next]._M_opcode()</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  == _S_opcode_dummy)</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  __it._M_next = (*<span class="keyword">this</span>)[__it._M_next]._M_next;</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">if</span> (__it._M_has_alt())</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">while</span> (__it._M_alt >= 0 && (*<span class="keyword">this</span>)[__it._M_alt]._M_opcode()</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  == _S_opcode_dummy)</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  __it._M_alt = (*<span class="keyword">this</span>)[__it._M_alt]._M_next;</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  }</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  }</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="comment">// Just apply DFS on the sequence and re-link their links.</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _TraitsT></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  _StateSeq<_TraitsT></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  _StateSeq<_TraitsT>::_M_clone()</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  {</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <a class="code" href="a07724.html">std::map<_StateIdT, _StateIdT></a> __m;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="a07788.html">std::stack<_StateIdT></a> __stack;</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  __stack.<a class="code" href="a07788.html#a7efe15f8159c166b68a24486ec561608">push</a>(_M_start);</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">while</span> (!__stack.<a class="code" href="a07788.html#a86e3c205d6100cd4bb98b4b7e36bb35e">empty</a>())</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  {</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keyword">auto</span> __u = __stack.<a class="code" href="a07788.html#adc6f199f89b9bcf05884bcfcf96e18ea">top</a>();</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  __stack.<a class="code" href="a07788.html#a16b93d714717c5af52a14ebd6fec11b7">pop</a>();</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keyword">auto</span> __dup = _M_nfa[__u];</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="comment">// _M_insert_state() never return -1</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keyword">auto</span> __id = _M_nfa._M_insert_state(std::move(__dup));</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  __m[__u] = __id;</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">if</span> (__dup._M_has_alt())</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">if</span> (__dup._M_alt != _S_invalid_state_id</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  && __m.<a class="code" href="a07724.html#a44da6d0dc51d80a873cc9405a805c712">count</a>(__dup._M_alt) == 0)</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  __stack.<a class="code" href="a07788.html#a7efe15f8159c166b68a24486ec561608">push</a>(__dup._M_alt);</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">if</span> (__u == _M_end)</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">if</span> (__dup._M_next != _S_invalid_state_id</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  && __m.<a class="code" href="a07724.html#a44da6d0dc51d80a873cc9405a805c712">count</a>(__dup._M_next) == 0)</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  __stack.<a class="code" href="a07788.html#a7efe15f8159c166b68a24486ec561608">push</a>(__dup._M_next);</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  }</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> __it : __m)</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  {</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keyword">auto</span> __v = __it.second;</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keyword">auto</span>& __ref = _M_nfa[__v];</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">if</span> (__ref._M_next != _S_invalid_state_id)</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  {</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  __glibcxx_assert(__m.count(__ref._M_next) > 0);</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  __ref._M_next = __m[__ref._M_next];</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  }</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">if</span> (__ref._M_has_alt())</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordflow">if</span> (__ref._M_alt != _S_invalid_state_id)</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  {</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  __glibcxx_assert(__m.count(__ref._M_alt) > 0);</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  __ref._M_alt = __m[__ref._M_alt];</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  }</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  }</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordflow">return</span> _StateSeq(_M_nfa, __m[_M_start], __m[_M_end]);</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> } <span class="comment">// namespace __detail</span></div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span> } <span class="comment">// namespace</span></div><div class="ttc" id="a07724_html_a44da6d0dc51d80a873cc9405a805c712"><div class="ttname"><a href="a07724.html#a44da6d0dc51d80a873cc9405a805c712">std::map::count</a></div><div class="ttdeci">size_type count(const key_type &__x) const</div><div class="ttdoc">Finds the number of elements with given key.</div><div class="ttdef"><b>Definition:</b> <a href="a00560_source.html#l01214">stl_map.h:1214</a></div></div>
<div class="ttc" id="a01564_html_a5beb02024da71cad08b124851240493a"><div class="ttname"><a href="a01564.html#a5beb02024da71cad08b124851240493a">std::regex_constants::__polynomial</a></div><div class="ttdeci">_GLIBCXX17_INLINE constexpr syntax_option_type __polynomial</div><div class="ttdef"><b>Definition:</b> <a href="a00482_source.html#l00179">regex_constants.h:179</a></div></div>
<div class="ttc" id="a01564_html_acdf6decf6d03ea2275dcec3961719d9a"><div class="ttname"><a href="a01564.html#acdf6decf6d03ea2275dcec3961719d9a">std::regex_constants::error_complexity</a></div><div class="ttdeci">constexpr error_type error_complexity(_S_error_complexity)</div></div>
<div class="ttc" id="a07788_html_adc6f199f89b9bcf05884bcfcf96e18ea"><div class="ttname"><a href="a07788.html#adc6f199f89b9bcf05884bcfcf96e18ea">std::stack::top</a></div><div class="ttdeci">reference top()</div><div class="ttdef"><b>Definition:</b> <a href="a00587_source.html#l00198">stl_stack.h:198</a></div></div>
<div class="ttc" id="a07788_html_a7efe15f8159c166b68a24486ec561608"><div class="ttname"><a href="a07788.html#a7efe15f8159c166b68a24486ec561608">std::stack::push</a></div><div class="ttdeci">void push(const value_type &__x)</div><div class="ttdoc">Add data to the top of the stack.</div><div class="ttdef"><b>Definition:</b> <a href="a00587_source.html#l00225">stl_stack.h:225</a></div></div>
<div class="ttc" id="a01538_html"><div class="ttname"><a href="a01538.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std.</div></div>
<div class="ttc" id="a07788_html_a16b93d714717c5af52a14ebd6fec11b7"><div class="ttname"><a href="a07788.html#a16b93d714717c5af52a14ebd6fec11b7">std::stack::pop</a></div><div class="ttdeci">void pop()</div><div class="ttdoc">Removes first element.</div><div class="ttdef"><b>Definition:</b> <a href="a00587_source.html#l00258">stl_stack.h:258</a></div></div>
<div class="ttc" id="a07788_html_a86e3c205d6100cd4bb98b4b7e36bb35e"><div class="ttname"><a href="a07788.html#a86e3c205d6100cd4bb98b4b7e36bb35e">std::stack::empty</a></div><div class="ttdeci">bool empty() const</div><div class="ttdef"><b>Definition:</b> <a href="a00587_source.html#l00185">stl_stack.h:185</a></div></div>
<div class="ttc" id="a07724_html"><div class="ttname"><a href="a07724.html">std::map</a></div><div class="ttdoc">A standard container made up of (key,value) pairs, which can be retrieved based on a key,...</div><div class="ttdef"><b>Definition:</b> <a href="a00560_source.html#l00100">stl_map.h:100</a></div></div>
<div class="ttc" id="a07788_html"><div class="ttname"><a href="a07788.html">std::stack</a></div><div class="ttdoc">A standard container giving FILO behavior.</div><div class="ttdef"><b>Definition:</b> <a href="a00587_source.html#l00099">stl_stack.h:99</a></div></div>
<div class="ttc" id="a02460_html"><div class="ttname"><a href="a02460.html">std::basic_ostream< char ></a></div></div>
<div class="ttc" id="a01564_html_acc0f88e638558f5c3bb64ea44832493b"><div class="ttname"><a href="a01564.html#acc0f88e638558f5c3bb64ea44832493b">std::regex_constants::error_backref</a></div><div class="ttdeci">constexpr error_type error_backref(_S_error_backref)</div></div>
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