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<a href="a00035.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">// RTTI support for -*- C++ -*-</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright (C) 1994-2018 Free Software Foundation, Inc.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">//</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// This file is part of GCC.</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// GCC is free software; you can redistribute it and/or modify</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// it under the terms of the GNU General Public License as published by</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// the 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> <span class="comment">//</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// GCC 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> <span class="comment">//</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// You should have received a copy of the GNU General Public License and</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/** @file typeinfo</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * This is a Standard C++ Library header.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#ifndef _TYPEINFO</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#define _TYPEINFO</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#pragma GCC system_header</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="code" href="a00326.html">bits/exception.h</a>></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <<a class="code" href="a00368.html">bits/hash_bytes.h</a>></span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#pragma GCC visibility push(default)</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">extern</span> <span class="stringliteral">"C++"</span> {</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="keyword">namespace </span>__cxxabiv1</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> {</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">class </span>__class_type_info;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> } <span class="comment">// namespace __cxxabiv1</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// Determine whether typeinfo names for the same type are merged (in which</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// case comparison can just compare pointers) or not (in which case strings</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">// must be compared), and whether comparison is to be implemented inline or</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">// not. We used to do inline pointer comparison by default if weak symbols</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// are available, but even with weak symbols sometimes names are not merged</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// when objects are loaded with RTLD_LOCAL, so now we always use strcmp by</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">// default. For ABI compatibility, we do the strcmp inline if weak symbols</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">// are available, and out-of-line if not. Out-of-line pointer comparison</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">// is used where the object files are to be portable to multiple systems,</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment">// some of which may not be able to use pointer comparison, but the</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// particular system for which libstdc++ is being built can use pointer</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment">// comparison; in particular for most ARM EABI systems, where the ABI</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">// specifies out-of-line comparison. The compiler's target configuration</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment">// can override the defaults by defining __GXX_TYPEINFO_EQUALITY_INLINE to</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment">// 1 or 0 to indicate whether or not comparison is inline, and</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">// __GXX_MERGED_TYPEINFO_NAMES to 1 or 0 to indicate whether or not pointer</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment">// comparison can be used.</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="preprocessor">#ifndef __GXX_MERGED_TYPEINFO_NAMES</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment">// By default, typeinfo names are not merged.</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#define __GXX_MERGED_TYPEINFO_NAMES 0</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">// By default follow the old inline rules to avoid ABI changes.</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#ifndef __GXX_TYPEINFO_EQUALITY_INLINE</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor"> #if !__GXX_WEAK__</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor"> #define __GXX_TYPEINFO_EQUALITY_INLINE 0</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor"> #else</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor"> #define __GXX_TYPEINFO_EQUALITY_INLINE 1</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor"> #endif</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">namespace </span><a class="code" href="a01538.html">std</a></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> {<span class="comment"></span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> /**</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> * @brief Part of RTTI.</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> *</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> * The @c type_info class describes type information generated by</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * an implementation.</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> */</span></div><div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="a01668.html"> 88</a></span>  <span class="keyword">class </span><a class="code" href="a01668.html">type_info</a></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  {</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">public</span>:<span class="comment"></span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> /** Destructor first. Being the first non-inline virtual function, this</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> * controls in which translation unit the vtable is emitted. The</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> * compiler makes use of that information to know where to emit</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> * the runtime-mandated type_info structures in the new-abi. */</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">virtual</span> <a class="code" href="a01668.html#a8704eaa0f305509d41fa695036a69494">~type_info</a>();</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"></span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> /** Returns an @e implementation-defined byte string; this is not</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> * portable between compilers! */</span></div><div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="a01668.html#afe60508ee089cebbd056bd50dfc7c3d7"> 99</a></span>  <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="a01668.html#afe60508ee089cebbd056bd50dfc7c3d7">name</a>() const _GLIBCXX_NOEXCEPT</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  { <span class="keywordflow">return</span> __name[0] == <span class="charliteral">'*'</span> ? __name + 1 : __name; }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor">#if !__GXX_TYPEINFO_EQUALITY_INLINE</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="comment">// In old abi, or when weak symbols are not supported, there can</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="comment">// be multiple instances of a type_info object for one</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">// type. Uniqueness must use the _name value, not object address.</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordtype">bool</span> before(<span class="keyword">const</span> <a class="code" href="a01668.html">type_info</a>& __arg) <span class="keyword">const</span> _GLIBCXX_NOEXCEPT;</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> <a class="code" href="a01668.html">type_info</a>& __arg) <span class="keyword">const</span> _GLIBCXX_NOEXCEPT;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor"> #if !__GXX_MERGED_TYPEINFO_NAMES</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> /** Returns true if @c *this precedes @c __arg in the implementation's</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * collation order. */</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="comment">// Even with the new abi, on systems that support dlopen</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="comment">// we can run into cases where type_info names aren't merged,</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="comment">// so we still need to do string comparison.</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordtype">bool</span> before(<span class="keyword">const</span> <a class="code" href="a01668.html">type_info</a>& __arg) <span class="keyword">const</span> _GLIBCXX_NOEXCEPT</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  { <span class="keywordflow">return</span> (__name[0] == <span class="charliteral">'*'</span> && __arg.__name[0] == <span class="charliteral">'*'</span>)</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  ? __name < __arg.__name</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  : __builtin_strcmp (__name, __arg.__name) < 0; }</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> type_info& __arg) <span class="keyword">const</span> _GLIBCXX_NOEXCEPT</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>  <span class="keywordflow">return</span> ((__name == __arg.__name)</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  || (__name[0] != <span class="charliteral">'*'</span> &&</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  __builtin_strcmp (__name, __arg.__name) == 0));</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="preprocessor"> #else</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="comment">// On some targets we can rely on type_info's NTBS being unique,</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="comment">// and therefore address comparisons are sufficient.</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordtype">bool</span> before(<span class="keyword">const</span> type_info& __arg) <span class="keyword">const</span> _GLIBCXX_NOEXCEPT</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  { <span class="keywordflow">return</span> __name < __arg.__name; }</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> type_info& __arg) <span class="keyword">const</span> _GLIBCXX_NOEXCEPT</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  { <span class="keywordflow">return</span> __name == __arg.__name; }</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="preprocessor"> #endif</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordtype">bool</span> operator!=(<span class="keyword">const</span> type_info& __arg) <span class="keyword">const</span> _GLIBCXX_NOEXCEPT</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  { <span class="keywordflow">return</span> !operator==(__arg); }</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordtype">size_t</span> hash_code() const noexcept</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  {</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="preprocessor"># if !__GXX_MERGED_TYPEINFO_NAMES</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">return</span> _Hash_bytes(<a class="code" href="a01668.html#afe60508ee089cebbd056bd50dfc7c3d7">name</a>(), __builtin_strlen(<a class="code" href="a01668.html#afe60508ee089cebbd056bd50dfc7c3d7">name</a>()),</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  static_cast<size_t>(0xc70f6907UL));</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="preprocessor"># else</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordflow">return</span> reinterpret_cast<size_t>(__name);</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="preprocessor"># endif</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="preprocessor">#endif // C++11</span></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="comment">// Return true if this is a pointer type of some kind</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> __is_pointer_p() <span class="keyword">const</span>;</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// Return true if this is a function type</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> __is_function_p() <span class="keyword">const</span>;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="comment">// Try and catch a thrown type. Store an adjusted pointer to the</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">// caught type in THR_OBJ. If THR_TYPE is not a pointer type, then</span></div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="comment">// THR_OBJ points to the thrown object. If THR_TYPE is a pointer</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="comment">// type, then THR_OBJ is the pointer itself. OUTER indicates the</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="comment">// number of outer pointers, and whether they were const</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="comment">// qualified.</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> __do_catch(<span class="keyword">const</span> type_info *__thr_type, <span class="keywordtype">void</span> **__thr_obj,</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordtype">unsigned</span> __outer) <span class="keyword">const</span>;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="comment">// Internally used during catch matching</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> __do_upcast(<span class="keyword">const</span> __cxxabiv1::__class_type_info *__target,</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordtype">void</span> **__obj_ptr) <span class="keyword">const</span>;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keyword">protected</span>:</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *__name;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keyword">explicit</span> type_info(<span class="keyword">const</span> <span class="keywordtype">char</span> *__n): __name(__n) { }</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>  <span class="keyword">private</span>:<span class="comment"></span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> /// Assigning type_info is not supported.</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"></span> type_info& operator=(<span class="keyword">const</span> type_info&);</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  type_info(<span class="keyword">const</span> type_info&);</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="comment"></span></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> /**</span></div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> * @brief Thrown during incorrect typecasting.</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> * @ingroup exceptions</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"> *</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"> * If you attempt an invalid @c dynamic_cast expression, an instance of</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> * this class (or something derived from this class) is thrown. */</span></div><div class="line"><a name="l00187"></a><span class="lineno"><a class="line" href="a01672.html"> 187</a></span>  <span class="keyword">class </span><a class="code" href="a01672.html">bad_cast</a> : <span class="keyword">public</span> <a class="code" href="a05424.html">exception</a></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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <a class="code" href="a01672.html">bad_cast</a>() _GLIBCXX_USE_NOEXCEPT { }</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">// This declaration is not useless:</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="comment">// http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118</span></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keyword">virtual</span> ~<a class="code" href="a01672.html">bad_cast</a>() _GLIBCXX_USE_NOEXCEPT;</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>  <span class="comment">// See comment in eh_exception.cc.</span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="a01672.html#a06dd9ba98e54d468ba243e7354c52714">what</a>() <span class="keyword">const</span> _GLIBCXX_USE_NOEXCEPT;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  };</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment"></span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> /**</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> * @brief Thrown when a NULL pointer in a @c typeid expression is used.</span></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> * @ingroup exceptions</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment"> */</span></div><div class="line"><a name="l00204"></a><span class="lineno"><a class="line" href="a01676.html"> 204</a></span>  <span class="keyword">class </span><a class="code" href="a01676.html">bad_typeid</a> : <span class="keyword">public</span> <a class="code" href="a05424.html">exception</a></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="keyword">public</span>:</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <a class="code" href="a01676.html">bad_typeid</a> () _GLIBCXX_USE_NOEXCEPT { }</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="comment">// This declaration is not useless:</span></div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">// http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118</span></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">virtual</span> ~<a class="code" href="a01676.html">bad_typeid</a>() _GLIBCXX_USE_NOEXCEPT;</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="comment">// See comment in eh_exception.cc.</span></div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="a01676.html#ad423bab305d43240e9798c55778ca199">what</a>() <span class="keyword">const</span> _GLIBCXX_USE_NOEXCEPT;</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  };</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> } <span class="comment">// namespace std</span></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="comment">// extern "C++"</span></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="preprocessor">#pragma GCC visibility pop</span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> </div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="a00368_html"><div class="ttname"><a href="a00368.html">hash_bytes.h</a></div></div>
<div class="ttc" id="a01672_html_a06dd9ba98e54d468ba243e7354c52714"><div class="ttname"><a href="a01672.html#a06dd9ba98e54d468ba243e7354c52714">std::bad_cast::what</a></div><div class="ttdeci">virtual const char * what() const noexcept</div></div>
<div class="ttc" id="a01668_html"><div class="ttname"><a href="a01668.html">std::type_info</a></div><div class="ttdoc">Part of RTTI.</div><div class="ttdef"><b>Definition:</b> <a href="a00035_source.html#l00088">typeinfo:88</a></div></div>
<div class="ttc" id="a01676_html"><div class="ttname"><a href="a01676.html">std::bad_typeid</a></div><div class="ttdoc">Thrown when a NULL pointer in a typeid expression is used.</div><div class="ttdef"><b>Definition:</b> <a href="a00035_source.html#l00204">typeinfo:204</a></div></div>
<div class="ttc" id="a00326_html"><div class="ttname"><a href="a00326.html">exception.h</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="a01668_html_a8704eaa0f305509d41fa695036a69494"><div class="ttname"><a href="a01668.html#a8704eaa0f305509d41fa695036a69494">std::type_info::~type_info</a></div><div class="ttdeci">virtual ~type_info()</div></div>
<div class="ttc" id="a01668_html_afe60508ee089cebbd056bd50dfc7c3d7"><div class="ttname"><a href="a01668.html#afe60508ee089cebbd056bd50dfc7c3d7">std::type_info::name</a></div><div class="ttdeci">const char * name() const noexcept</div><div class="ttdef"><b>Definition:</b> <a href="a00035_source.html#l00099">typeinfo:99</a></div></div>
<div class="ttc" id="a05424_html"><div class="ttname"><a href="a05424.html">std::exception</a></div><div class="ttdoc">Base class for all library exceptions.</div><div class="ttdef"><b>Definition:</b> <a href="a00326_source.html#l00060">exception.h:60</a></div></div>
<div class="ttc" id="a01672_html"><div class="ttname"><a href="a01672.html">std::bad_cast</a></div><div class="ttdoc">Thrown during incorrect typecasting.If you attempt an invalid dynamic_cast expression,...</div><div class="ttdef"><b>Definition:</b> <a href="a00035_source.html#l00187">typeinfo:187</a></div></div>
<div class="ttc" id="a01676_html_ad423bab305d43240e9798c55778ca199"><div class="ttname"><a href="a01676.html#ad423bab305d43240e9798c55778ca199">std::bad_typeid::what</a></div><div class="ttdeci">virtual const char * what() const noexcept</div></div>
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