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<a href="a00497.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_scanner.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="comment">// FIXME make comments doxygen format.</span></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> <span class="comment">// N3376 specified 6 regex styles: ECMAScript, basic, extended, grep, egrep</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// and awk</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// 1) grep is basic except '\n' is treated as '|'</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// 2) egrep is extended except '\n' is treated as '|'</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">// 3) awk is extended except special escaping rules, and there's no</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">// back-reference.</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">//</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">// References:</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">//</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// ECMAScript: ECMA-262 15.10</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">//</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// basic, extended:</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap09.html</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">//</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// awk: http://pubs.opengroup.org/onlinepubs/000095399/utilities/awk.html</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">namespace </span><a class="code" href="a01541.html">std</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> {</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">namespace </span>__detail</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="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  _Scanner(<span class="keyword">typename</span> _Scanner::_IterT __begin,</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">typename</span> _Scanner::_IterT __end,</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  _FlagT __flags, <a class="code" href="a05819.html">std::locale</a> __loc)</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  : _ScannerBase(__flags),</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  _M_current(__begin), _M_end(__end),</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  _M_ctype(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01492.html#ga8c25296d7a1b85124de8ac561e8945cf">use_facet</a><_CtypeT>(__loc)),</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  _M_eat_escape(_M_is_ecma()</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  ? &_Scanner::_M_eat_escape_ecma</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  : &_Scanner::_M_eat_escape_posix)</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  { _M_advance(); }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  _M_advance()</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  {</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">if</span> (_M_current == _M_end)</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>  _M_token = _S_token_eof;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  }</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">if</span> (_M_state == _S_state_normal)</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  _M_scan_normal();</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (_M_state == _S_state_in_bracket)</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  _M_scan_in_bracket();</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (_M_state == _S_state_in_brace)</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  _M_scan_in_brace();</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  {</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  __glibcxx_assert(<span class="keyword">false</span>);</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> </div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// Differences between styles:</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">// 1) "\(", "\)", "\{" in basic. It's not escaping.</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// 2) "(?:", "(?=", "(?!" in ECMAScript.</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  _M_scan_normal()</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  {</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">auto</span> __c = *_M_current++;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span> (std::strchr(_M_spec_char, _M_ctype.narrow(__c, <span class="charliteral">' '</span>)) == <span class="keyword">nullptr</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>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  }</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">if</span> (__c == <span class="charliteral">'\\'</span>)</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  {</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">if</span> (_M_current == _M_end)</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  __throw_regex_error(</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <a class="code" href="a01567.html#a27917cafce40928457c789313f8e7ba6">regex_constants::error_escape</a>,</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="stringliteral">"Unexpected end of regex when escaping."</span>);</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">if</span> (!_M_is_basic()</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  || (*_M_current != <span class="charliteral">'('</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  && *_M_current != <span class="charliteral">')'</span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  && *_M_current != <span class="charliteral">'{'</span>))</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  {</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  (this->*_M_eat_escape)();</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  __c = *_M_current++;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  }</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span> (__c == <span class="charliteral">'('</span>)</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  {</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">if</span> (_M_is_ecma() && *_M_current == <span class="charliteral">'?'</span>)</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  {</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">if</span> (++_M_current == _M_end)</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  __throw_regex_error(</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <a class="code" href="a01567.html#a828988901e2b5aafb2ad06adde9e581b">regex_constants::error_paren</a>,</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="stringliteral">"Unexpected end of regex when in an open parenthesis."</span>);</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>  <span class="keywordflow">if</span> (*_M_current == <span class="charliteral">':'</span>)</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  {</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  ++_M_current;</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  _M_token = _S_token_subexpr_no_group_begin;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (*_M_current == <span class="charliteral">'='</span>)</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  {</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  ++_M_current;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  _M_token = _S_token_subexpr_lookahead_begin;</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  _M_value.assign(1, <span class="charliteral">'p'</span>);</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  }</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (*_M_current == <span class="charliteral">'!'</span>)</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  {</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  ++_M_current;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  _M_token = _S_token_subexpr_lookahead_begin;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  _M_value.assign(1, <span class="charliteral">'n'</span>);</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  __throw_regex_error(</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <a class="code" href="a01567.html#a828988901e2b5aafb2ad06adde9e581b">regex_constants::error_paren</a>,</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="stringliteral">"Invalid special open parenthesis."</span>);</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  }</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (_M_flags & <a class="code" href="a01567.html#a29777ae2dd2358f4faf29cb604c3fb85">regex_constants::nosubs</a>)</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  _M_token = _S_token_subexpr_no_group_begin;</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  _M_token = _S_token_subexpr_begin;</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  }</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">')'</span>)</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  _M_token = _S_token_subexpr_end;</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'['</span>)</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  _M_state = _S_state_in_bracket;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  _M_at_bracket_start = <span class="keyword">true</span>;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span> (_M_current != _M_end && *_M_current == <span class="charliteral">'^'</span>)</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  {</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  _M_token = _S_token_bracket_neg_begin;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  ++_M_current;</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  _M_token = _S_token_bracket_begin;</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  }</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'{'</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>  _M_state = _S_state_in_brace;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  _M_token = _S_token_interval_begin;</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  }</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c != <span class="charliteral">']'</span> && __c != <span class="charliteral">'}'</span>)</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  {</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keyword">auto</span> __it = _M_token_tbl;</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keyword">auto</span> __narrowc = _M_ctype.narrow(__c, <span class="charliteral">'\0'</span>);</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">for</span> (; __it->first != <span class="charliteral">'\0'</span>; ++__it)</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">if</span> (__it->first == __narrowc)</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  {</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  _M_token = __it->second;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  }</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  __glibcxx_assert(<span class="keyword">false</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>  <span class="keywordflow">else</span></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  {</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  }</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> </div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="comment">// Differences between styles:</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// 1) different semantics of "[]" and "[^]".</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="comment">// 2) Escaping in bracket expr.</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  _M_scan_in_bracket()</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  {</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">if</span> (_M_current == _M_end)</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  __throw_regex_error(</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <a class="code" href="a01567.html#ac9ef78846632df7d0916b933191e3bcc">regex_constants::error_brack</a>,</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="stringliteral">"Unexpected end of regex when in bracket expression."</span>);</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">auto</span> __c = *_M_current++;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">if</span> (__c == <span class="charliteral">'-'</span>)</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  _M_token = _S_token_bracket_dash;</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'['</span>)</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  {</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">if</span> (_M_current == _M_end)</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  __throw_regex_error(<a class="code" href="a01567.html#ac9ef78846632df7d0916b933191e3bcc">regex_constants::error_brack</a>,</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="stringliteral">"Unexpected character class open bracket."</span>);</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">if</span> (*_M_current == <span class="charliteral">'.'</span>)</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  {</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  _M_token = _S_token_collsymbol;</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  _M_eat_class(*_M_current++);</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  }</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (*_M_current == <span class="charliteral">':'</span>)</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  {</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  _M_token = _S_token_char_class_name;</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  _M_eat_class(*_M_current++);</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  }</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (*_M_current == <span class="charliteral">'='</span>)</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>  _M_token = _S_token_equiv_class_name;</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  _M_eat_class(*_M_current++);</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="keywordflow">else</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>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  }</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  }</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="comment">// In POSIX, when encountering "[]" or "[^]", the ']' is interpreted</span></div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="comment">// literally. So "[]]" and "[^]]" are valid regexes. See the testcases</span></div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="comment">// `*/empty_range.cc`.</span></div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">']'</span> && (_M_is_ecma() || !_M_at_bracket_start))</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  {</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  _M_token = _S_token_bracket_end;</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  _M_state = _S_state_normal;</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  }</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="comment">// ECMAScript and awk permits escaping in bracket.</span></div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'\\'</span> && (_M_is_ecma() || _M_is_awk()))</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  (this->*_M_eat_escape)();</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  {</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  }</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  _M_at_bracket_start = <span class="keyword">false</span>;</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  }</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="comment">// Differences between styles:</span></div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="comment">// 1) "\}" in basic style.</span></div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  _M_scan_in_brace()</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  {</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">if</span> (_M_current == _M_end)</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  __throw_regex_error(</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <a class="code" href="a01567.html#a23b6569c17f71c8b1c00b515b8e02a0d">regex_constants::error_brace</a>,</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="stringliteral">"Unexpected end of regex when in brace expression."</span>);</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> </div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keyword">auto</span> __c = *_M_current++;</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">if</span> (_M_ctype.is(_CtypeT::digit, __c))</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  {</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  _M_token = _S_token_dup_count;</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">while</span> (_M_current != _M_end</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  && _M_ctype.is(_CtypeT::digit, *_M_current))</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  _M_value += *_M_current++;</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  }</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">','</span>)</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  _M_token = _S_token_comma;</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="comment">// basic use \}.</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (_M_is_basic())</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  {</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">if</span> (__c == <span class="charliteral">'\\'</span> && _M_current != _M_end && *_M_current == <span class="charliteral">'}'</span>)</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  {</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  _M_state = _S_state_normal;</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  _M_token = _S_token_interval_end;</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  ++_M_current;</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  }</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  __throw_regex_error(<a class="code" href="a01567.html#a272600147c8274c0d78fcda6b53eb0c6">regex_constants::error_badbrace</a>,</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="stringliteral">"Unexpected character in brace expression."</span>);</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  }</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'}'</span>)</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  {</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  _M_state = _S_state_normal;</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  _M_token = _S_token_interval_end;</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  }</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  __throw_regex_error(<a class="code" href="a01567.html#a272600147c8274c0d78fcda6b53eb0c6">regex_constants::error_badbrace</a>,</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="stringliteral">"Unexpected character in brace expression."</span>);</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  }</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> </div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  _M_eat_escape_ecma()</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  {</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordflow">if</span> (_M_current == _M_end)</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  __throw_regex_error(<a class="code" href="a01567.html#a27917cafce40928457c789313f8e7ba6">regex_constants::error_escape</a>,</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="stringliteral">"Unexpected end of regex when escaping."</span>);</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span> </div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keyword">auto</span> __c = *_M_current++;</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keyword">auto</span> __pos = _M_find_escape(_M_ctype.narrow(__c, <span class="charliteral">'\0'</span>));</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">if</span> (__pos != <span class="keyword">nullptr</span> && (__c != <span class="charliteral">'b'</span> || _M_state == _S_state_in_bracket))</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  {</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  _M_value.assign(1, *__pos);</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  }</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'b'</span>)</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  {</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  _M_token = _S_token_word_bound;</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  _M_value.assign(1, <span class="charliteral">'p'</span>);</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  }</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'B'</span>)</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  {</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  _M_token = _S_token_word_bound;</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  _M_value.assign(1, <span class="charliteral">'n'</span>);</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  }</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="comment">// N3376 28.13</span></div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'d'</span></div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  || __c == <span class="charliteral">'D'</span></div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  || __c == <span class="charliteral">'s'</span></div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  || __c == <span class="charliteral">'S'</span></div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  || __c == <span class="charliteral">'w'</span></div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  || __c == <span class="charliteral">'W'</span>)</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  {</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  _M_token = _S_token_quoted_class;</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'c'</span>)</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  {</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordflow">if</span> (_M_current == _M_end)</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  __throw_regex_error(</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <a class="code" href="a01567.html#a27917cafce40928457c789313f8e7ba6">regex_constants::error_escape</a>,</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="stringliteral">"Unexpected end of regex when reading control code."</span>);</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  _M_value.assign(1, *_M_current++);</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  }</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__c == <span class="charliteral">'x'</span> || __c == <span class="charliteral">'u'</span>)</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  {</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  _M_value.erase();</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> __i = 0; __i < (__c == <span class="charliteral">'x'</span> ? 2 : 4); __i++)</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  {</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">if</span> (_M_current == _M_end</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  || !_M_ctype.is(_CtypeT::xdigit, *_M_current))</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  __throw_regex_error(</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <a class="code" href="a01567.html#a27917cafce40928457c789313f8e7ba6">regex_constants::error_escape</a>,</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="stringliteral">"Unexpected end of regex when ascii character."</span>);</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  _M_value += *_M_current++;</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  }</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  _M_token = _S_token_hex_num;</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  }</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="comment">// ECMAScript recognizes multi-digit back-references.</span></div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (_M_ctype.is(_CtypeT::digit, __c))</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  {</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keywordflow">while</span> (_M_current != _M_end</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  && _M_ctype.is(_CtypeT::digit, *_M_current))</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  _M_value += *_M_current++;</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  _M_token = _S_token_backref;</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  }</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  {</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  }</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  }</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span> </div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="comment">// Differences between styles:</span></div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <span class="comment">// 1) Extended doesn't support backref, but basic does.</span></div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  _M_eat_escape_posix()</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  {</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keywordflow">if</span> (_M_current == _M_end)</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  __throw_regex_error(<a class="code" href="a01567.html#a27917cafce40928457c789313f8e7ba6">regex_constants::error_escape</a>,</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="stringliteral">"Unexpected end of regex when escaping."</span>);</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span> </div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keyword">auto</span> __c = *_M_current;</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="keyword">auto</span> __pos = std::strchr(_M_spec_char, _M_ctype.narrow(__c, <span class="charliteral">'\0'</span>));</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span> </div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keywordflow">if</span> (__pos != <span class="keyword">nullptr</span> && *__pos != <span class="charliteral">'\0'</span>)</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  {</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  }</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="comment">// We MUST judge awk before handling backrefs. There's no backref in awk.</span></div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (_M_is_awk())</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  {</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  _M_eat_escape_awk();</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  }</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (_M_is_basic() && _M_ctype.is(_CtypeT::digit, __c) && __c != <span class="charliteral">'0'</span>)</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  {</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  _M_token = _S_token_backref;</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  }</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  {</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span> <span class="preprocessor">#ifdef __STRICT_ANSI__</span></div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="comment">// POSIX says it is undefined to escape ordinary characters</span></div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  __throw_regex_error(<a class="code" href="a01567.html#a27917cafce40928457c789313f8e7ba6">regex_constants::error_escape</a>,</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="stringliteral">"Unexpected escape character."</span>);</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  }</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  ++_M_current;</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  }</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span> </div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  _M_eat_escape_awk()</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  {</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keyword">auto</span> __c = *_M_current++;</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="keyword">auto</span> __pos = _M_find_escape(_M_ctype.narrow(__c, <span class="charliteral">'\0'</span>));</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span> </div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keywordflow">if</span> (__pos != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  {</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  _M_token = _S_token_ord_char;</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  _M_value.assign(1, *__pos);</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  }</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="comment">// \ddd for oct representation</span></div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (_M_ctype.is(_CtypeT::digit, __c)</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  && __c != <span class="charliteral">'8'</span></div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  && __c != <span class="charliteral">'9'</span>)</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  {</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  _M_value.assign(1, __c);</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> __i = 0;</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  __i < 2</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  && _M_current != _M_end</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  && _M_ctype.is(_CtypeT::digit, *_M_current)</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  && *_M_current != <span class="charliteral">'8'</span></div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  && *_M_current != <span class="charliteral">'9'</span>;</div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  __i++)</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  _M_value += *_M_current++;</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  _M_token = _S_token_oct_num;</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  }</div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  __throw_regex_error(<a class="code" href="a01567.html#a27917cafce40928457c789313f8e7ba6">regex_constants::error_escape</a>,</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="stringliteral">"Unexpected escape character."</span>);</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  }</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span> </div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="comment">// Eats a character class or throws an exception.</span></div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  <span class="comment">// __ch could be ':', '.' or '=', _M_current is the char after ']' when</span></div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="comment">// returning.</span></div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  _M_eat_class(<span class="keywordtype">char</span> __ch)</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  {</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keywordflow">for</span> (_M_value.clear(); _M_current != _M_end && *_M_current != __ch;)</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  _M_value += *_M_current++;</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <span class="keywordflow">if</span> (_M_current == _M_end</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  || *_M_current++ != __ch</div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  || _M_current == _M_end <span class="comment">// skip __ch</span></div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  || *_M_current++ != <span class="charliteral">']'</span>) <span class="comment">// skip ']'</span></div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  {</div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <span class="keywordflow">if</span> (__ch == <span class="charliteral">':'</span>)</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  __throw_regex_error(<a class="code" href="a01567.html#a19db2783be8034b2dd52e99657184670">regex_constants::error_ctype</a>,</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="stringliteral">"Unexpected end of character class."</span>);</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  __throw_regex_error(<a class="code" href="a01567.html#ade164916507884ce776bba031f7bce60">regex_constants::error_collate</a>,</div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <span class="stringliteral">"Unexpected end of character class."</span>);</div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  }</div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  }</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span> </div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="preprocessor">#ifdef _GLIBCXX_DEBUG</span></div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _CharT></div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <a class="code" href="a02463.html">std::ostream</a>&</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  _Scanner<_CharT>::</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  _M_print(<a class="code" href="a02463.html">std::ostream</a>& ostr)</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  {</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  <span class="keywordflow">switch</span> (_M_token)</div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  {</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keywordflow">case</span> _S_token_anychar:</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  ostr << <span class="stringliteral">"any-character\n"</span>;</div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keywordflow">case</span> _S_token_backref:</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  ostr << <span class="stringliteral">"backref\n"</span>;</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordflow">case</span> _S_token_bracket_begin:</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  ostr << <span class="stringliteral">"bracket-begin\n"</span>;</div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <span class="keywordflow">case</span> _S_token_bracket_neg_begin:</div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  ostr << <span class="stringliteral">"bracket-neg-begin\n"</span>;</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="keywordflow">case</span> _S_token_bracket_end:</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  ostr << <span class="stringliteral">"bracket-end\n"</span>;</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  <span class="keywordflow">case</span> _S_token_char_class_name:</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  ostr << <span class="stringliteral">"char-class-name \""</span> << _M_value << <span class="stringliteral">"\"\n"</span>;</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordflow">case</span> _S_token_closure0:</div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  ostr << <span class="stringliteral">"closure0\n"</span>;</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="keywordflow">case</span> _S_token_closure1:</div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  ostr << <span class="stringliteral">"closure1\n"</span>;</div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <span class="keywordflow">case</span> _S_token_collsymbol:</div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  ostr << <span class="stringliteral">"collsymbol \""</span> << _M_value << <span class="stringliteral">"\"\n"</span>;</div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keywordflow">case</span> _S_token_comma:</div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  ostr << <span class="stringliteral">"comma\n"</span>;</div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keywordflow">case</span> _S_token_dup_count:</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  ostr << <span class="stringliteral">"dup count: "</span> << _M_value << <span class="stringliteral">"\n"</span>;</div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <span class="keywordflow">case</span> _S_token_eof:</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  ostr << <span class="stringliteral">"EOF\n"</span>;</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  <span class="keywordflow">case</span> _S_token_equiv_class_name:</div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  ostr << <span class="stringliteral">"equiv-class-name \""</span> << _M_value << <span class="stringliteral">"\"\n"</span>;</div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="keywordflow">case</span> _S_token_interval_begin:</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  ostr << <span class="stringliteral">"interval begin\n"</span>;</div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="keywordflow">case</span> _S_token_interval_end:</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  ostr << <span class="stringliteral">"interval end\n"</span>;</div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <span class="keywordflow">case</span> _S_token_line_begin:</div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  ostr << <span class="stringliteral">"line begin\n"</span>;</div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="keywordflow">case</span> _S_token_line_end:</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  ostr << <span class="stringliteral">"line end\n"</span>;</div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <span class="keywordflow">case</span> _S_token_opt:</div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  ostr << <span class="stringliteral">"opt\n"</span>;</div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="keywordflow">case</span> _S_token_or:</div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  ostr << <span class="stringliteral">"or\n"</span>;</div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  <span class="keywordflow">case</span> _S_token_ord_char:</div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  ostr << <span class="stringliteral">"ordinary character: \""</span> << _M_value << <span class="stringliteral">"\"\n"</span>;</div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="keywordflow">case</span> _S_token_subexpr_begin:</div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  ostr << <span class="stringliteral">"subexpr begin\n"</span>;</div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <span class="keywordflow">case</span> _S_token_subexpr_no_group_begin:</div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  ostr << <span class="stringliteral">"no grouping subexpr begin\n"</span>;</div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="keywordflow">case</span> _S_token_subexpr_lookahead_begin:</div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  ostr << <span class="stringliteral">"lookahead subexpr begin\n"</span>;</div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  <span class="keywordflow">case</span> _S_token_subexpr_end:</div><div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  ostr << <span class="stringliteral">"subexpr end\n"</span>;</div><div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="keywordflow">case</span> _S_token_unknown:</div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  ostr << <span class="stringliteral">"-- unknown token --\n"</span>;</div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  <span class="keywordflow">case</span> _S_token_oct_num:</div><div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  ostr << <span class="stringliteral">"oct number "</span> << _M_value << <span class="stringliteral">"\n"</span>;</div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  <span class="keywordflow">case</span> _S_token_hex_num:</div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  ostr << <span class="stringliteral">"hex number "</span> << _M_value << <span class="stringliteral">"\n"</span>;</div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  <span class="keywordflow">case</span> _S_token_quoted_class:</div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  ostr << <span class="stringliteral">"quoted class "</span> << <span class="stringliteral">"\\"</span> << _M_value << <span class="stringliteral">"\n"</span>;</div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  _GLIBCXX_DEBUG_ASSERT(<span class="keyword">false</span>);</div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  }</div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  <span class="keywordflow">return</span> ostr;</div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  }</div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00586"></a><span class="lineno"> 586</span> </div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span> } <span class="comment">// namespace __detail</span></div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span> } <span class="comment">// namespace</span></div><div class="ttc" id="a01567_html_a29777ae2dd2358f4faf29cb604c3fb85"><div class="ttname"><a href="a01567.html#a29777ae2dd2358f4faf29cb604c3fb85">std::regex_constants::nosubs</a></div><div class="ttdeci">_GLIBCXX17_INLINE constexpr syntax_option_type nosubs</div><div class="ttdef"><b>Definition:</b> <a href="a00482_source.html#l00095">regex_constants.h:95</a></div></div>
<div class="ttc" id="a01567_html_a27917cafce40928457c789313f8e7ba6"><div class="ttname"><a href="a01567.html#a27917cafce40928457c789313f8e7ba6">std::regex_constants::error_escape</a></div><div class="ttdeci">constexpr error_type error_escape(_S_error_escape)</div></div>
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<div class="ttc" id="a01492_html_ga8c25296d7a1b85124de8ac561e8945cf"><div class="ttname"><a href="a01492.html#ga8c25296d7a1b85124de8ac561e8945cf">std::use_facet</a></div><div class="ttdeci">const _Facet & use_facet(const locale &__loc)</div><div class="ttdoc">Return a facet.use_facet looks for and returns a reference to a facet of type Facet where Facet is th...</div><div class="ttdef"><b>Definition:</b> <a href="a00395_source.html#l00132">locale_classes.tcc:132</a></div></div>
<div class="ttc" id="a01541_html"><div class="ttname"><a href="a01541.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std.</div></div>
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<div class="ttc" id="a01567_html_a272600147c8274c0d78fcda6b53eb0c6"><div class="ttname"><a href="a01567.html#a272600147c8274c0d78fcda6b53eb0c6">std::regex_constants::error_badbrace</a></div><div class="ttdeci">constexpr error_type error_badbrace(_S_error_badbrace)</div></div>
<div class="ttc" id="a01567_html_a19db2783be8034b2dd52e99657184670"><div class="ttname"><a href="a01567.html#a19db2783be8034b2dd52e99657184670">std::regex_constants::error_ctype</a></div><div class="ttdeci">constexpr error_type error_ctype(_S_error_ctype)</div></div>
<div class="ttc" id="a05819_html"><div class="ttname"><a href="a05819.html">std::locale</a></div><div class="ttdoc">Container class for localization functionality.The locale class is first a class wrapper for C librar...</div><div class="ttdef"><b>Definition:</b> <a href="a00392_source.html#l00062">locale_classes.h:62</a></div></div>
<div class="ttc" id="a01567_html_a828988901e2b5aafb2ad06adde9e581b"><div class="ttname"><a href="a01567.html#a828988901e2b5aafb2ad06adde9e581b">std::regex_constants::error_paren</a></div><div class="ttdeci">constexpr error_type error_paren(_S_error_paren)</div></div>
<div class="ttc" id="a01567_html_ac9ef78846632df7d0916b933191e3bcc"><div class="ttname"><a href="a01567.html#ac9ef78846632df7d0916b933191e3bcc">std::regex_constants::error_brack</a></div><div class="ttdeci">constexpr error_type error_brack(_S_error_brack)</div></div>
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