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<a href="a00140.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> // String based streams -*- C++ -*-</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> // Copyright (C) 1997-2018 Free Software Foundation, Inc.</div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> //</div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> // This file is part of the GNU ISO C++ Library. This library is free</div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> // software; you can redistribute it and/or modify it under the</div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> // terms of the GNU General Public License as published by the</div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> // Free Software Foundation; either version 3, or (at your option)</div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> // any later version.</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> // This library is distributed in the hope that it will be useful,</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> // but WITHOUT ANY WARRANTY; without even the implied warranty of</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> // GNU General Public License for more details.</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> // Under Section 7 of GPL version 3, you are granted additional</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> // permissions described in the GCC Runtime Library Exception, version</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> // 3.1, as published by the Free Software Foundation.</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> // You should have received a copy of the GNU General Public License and</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> // a copy of the GCC Runtime Library Exception along with this program;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> // <http://www.gnu.org/licenses/>.</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> /** @file include/sstream</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  * This is a Standard C++ Library header.</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</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> //</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> // ISO C++ 14882: 27.7 String-based streams</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> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> #ifndef _GLIBCXX_SSTREAM</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> #define _GLIBCXX_SSTREAM 1</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> #pragma GCC system_header</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> #include <istream></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> #include <ostream></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> namespace std _GLIBCXX_VISIBILITY(default)</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> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> _GLIBCXX_BEGIN_NAMESPACE_CXX11</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  // [27.7.1] template class basic_stringbuf</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>  * @brief The actual work of input and output (for std::string).</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  * @ingroup io</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>  * @tparam _CharT Type of character stream.</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  * @tparam _Traits Traits for character type, defaults to</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  * char_traits<_CharT>.</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  *</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  * This class associates either or both of its input and output sequences</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  * with a sequence of characters, which can be initialized from, or made</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  * available as, a @c std::basic_string. (Paraphrased from [27.7.1]/1.)</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  *</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  * For this class, open modes (of type @c ios_base::openmode) have</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  * @c in set if the input sequence can be read, and @c out set if the</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  * output sequence can be written.</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  */</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  template<typename _CharT, typename _Traits, typename _Alloc></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  class basic_stringbuf : public basic_streambuf<_CharT, _Traits></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  {</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  struct __xfer_bufptrs;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  public:</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  // Types:</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  typedef _CharT char_type;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  typedef _Traits traits_type;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  // 251. basic_stringbuf missing allocator_type</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  typedef _Alloc allocator_type;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  typedef typename traits_type::int_type int_type;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  typedef typename traits_type::pos_type pos_type;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  typedef typename traits_type::off_type off_type;</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>  typedef basic_streambuf<char_type, traits_type> __streambuf_type;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  typedef basic_string<char_type, _Traits, _Alloc> __string_type;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  typedef typename __string_type::size_type __size_type;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  protected:</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  /// Place to stash in || out || in | out settings for current stringbuf.</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  ios_base::openmode _M_mode;</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>  // Data Members:</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  __string_type _M_string;</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>  public:</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  // Constructors:</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  /**</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  * @brief Starts with an empty string buffer.</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  * @param __mode Whether the buffer can read, or write, or both.</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  *</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  * The default constructor initializes the parent class using its</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  * own default ctor.</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>  explicit</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  basic_stringbuf(ios_base::openmode __mode = ios_base::in | ios_base::out)</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  : __streambuf_type(), _M_mode(__mode), _M_string()</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> </div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  /**</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  * @brief Starts with an existing string buffer.</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  * @param __str A string to copy as a starting buffer.</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  * @param __mode Whether the buffer can read, or write, or both.</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>  * This constructor initializes the parent class using its</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  * own default ctor.</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  */</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  explicit</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  basic_stringbuf(const __string_type& __str,</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  ios_base::openmode __mode = ios_base::in | ios_base::out)</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  : __streambuf_type(), _M_mode(),</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  _M_string(__str.data(), __str.size(), __str.get_allocator())</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  { _M_stringbuf_init(__mode); }</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> #if __cplusplus >= 201103L</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  basic_stringbuf(const basic_stringbuf&) = delete;</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>  basic_stringbuf(basic_stringbuf&& __rhs)</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  : basic_stringbuf(std::move(__rhs), __xfer_bufptrs(__rhs, this))</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  { __rhs._M_sync(const_cast<char_type*>(__rhs._M_string.data()), 0, 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>  // 27.8.2.2 Assign and swap:</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>  basic_stringbuf&</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  operator=(const basic_stringbuf&) = delete;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  basic_stringbuf&</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  operator=(basic_stringbuf&& __rhs)</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  {</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  __xfer_bufptrs __st{__rhs, this};</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  const __streambuf_type& __base = __rhs;</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  __streambuf_type::operator=(__base);</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  this->pubimbue(__rhs.getloc());</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  _M_mode = __rhs._M_mode;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  _M_string = std::move(__rhs._M_string);</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  __rhs._M_sync(const_cast<char_type*>(__rhs._M_string.data()), 0, 0);</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  return *this;</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</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>  void</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  swap(basic_stringbuf& __rhs)</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  {</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  __xfer_bufptrs __l_st{*this, std::__addressof(__rhs)};</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  __xfer_bufptrs __r_st{__rhs, this};</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  __streambuf_type& __base = __rhs;</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  __streambuf_type::swap(__base);</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  __rhs.pubimbue(this->pubimbue(__rhs.getloc()));</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  std::swap(_M_mode, __rhs._M_mode);</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  std::swap(_M_string, __rhs._M_string);</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> #endif</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>  // Get and set:</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  /**</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  * @brief Copying out the string buffer.</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  * @return A copy of one of the underlying sequences.</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  *</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  * <em>If the buffer is only created in input mode, the underlying</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  * character sequence is equal to the input sequence; otherwise, it</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  * is equal to the output sequence.</em> [27.7.1.2]/1</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>  __string_type</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  str() const</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  {</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  __string_type __ret(_M_string.get_allocator());</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  if (this->pptr())</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  {</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  // The current egptr() may not be the actual string end.</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  if (this->pptr() > this->egptr())</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  __ret.assign(this->pbase(), this->pptr());</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  else</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  __ret.assign(this->pbase(), this->egptr());</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  else</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  __ret = _M_string;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  return __ret;</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  }</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  /**</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  * @brief Setting a new buffer.</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  * @param __s The string to use as a new sequence.</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  *</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  * Deallocates any previous stored sequence, then copies @a s to</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  * use as a new one.</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  */</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  void</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  str(const __string_type& __s)</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>  // Cannot use _M_string = __s, since v3 strings are COW</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  // (not always true now but assign() always works).</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  _M_string.assign(__s.data(), __s.size());</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  _M_stringbuf_init(_M_mode);</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> </div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  protected:</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  // Common initialization code goes here.</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  void</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  _M_stringbuf_init(ios_base::openmode __mode)</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  {</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  _M_mode = __mode;</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  __size_type __len = 0;</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  if (_M_mode & (ios_base::ate | ios_base::app))</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  __len = _M_string.size();</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  _M_sync(const_cast<char_type*>(_M_string.data()), 0, __len);</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</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>  virtual streamsize</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  showmanyc()</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  {</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  streamsize __ret = -1;</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  if (_M_mode & ios_base::in)</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>  _M_update_egptr();</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  __ret = this->egptr() - this->gptr();</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>  return __ret;</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> </div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  virtual int_type</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  underflow();</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>  virtual int_type</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  pbackfail(int_type __c = traits_type::eof());</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  virtual int_type</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  overflow(int_type __c = traits_type::eof());</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</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>  * @brief Manipulates the buffer.</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  * @param __s Pointer to a buffer area.</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  * @param __n Size of @a __s.</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  * @return @c this</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>  * If no buffer has already been created, and both @a __s and @a __n are</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  * non-zero, then @c __s is used as a buffer; see</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  * https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  * for more.</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  */</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  virtual __streambuf_type*</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  setbuf(char_type* __s, streamsize __n)</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  {</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  if (__s && __n >= 0)</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  {</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  // This is implementation-defined behavior, and assumes</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  // that an external char_type array of length __n exists</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  // and has been pre-allocated. If this is not the case,</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  // things will quickly blow up.</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> </div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  // Step 1: Destroy the current internal array.</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  _M_string.clear();</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  // Step 2: Use the external array.</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  _M_sync(__s, __n, 0);</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  }</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  return this;</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> </div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  virtual pos_type</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  seekoff(off_type __off, ios_base::seekdir __way,</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  ios_base::openmode __mode = ios_base::in | ios_base::out);</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  virtual pos_type</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  seekpos(pos_type __sp,</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  ios_base::openmode __mode = ios_base::in | ios_base::out);</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span> </div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  // Internal function for correctly updating the internal buffer</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  // for a particular _M_string, due to initialization or re-sizing</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  // of an existing _M_string.</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  void</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  _M_sync(char_type* __base, __size_type __i, __size_type __o);</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  // Internal function for correctly updating egptr() to the actual</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  // string end.</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  void</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  _M_update_egptr()</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  {</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  const bool __testin = _M_mode & ios_base::in;</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  if (this->pptr() && this->pptr() > this->egptr())</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  {</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  if (__testin)</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  this->setg(this->eback(), this->gptr(), this->pptr());</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  else</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  this->setg(this->pptr(), this->pptr(), this->pptr());</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</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> </div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  // Works around the issue with pbump, part of the protected</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  // interface of basic_streambuf, taking just an int.</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  void</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  _M_pbump(char_type* __pbeg, char_type* __pend, off_type __off);</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> </div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  private:</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span> #if _GLIBCXX_USE_CXX11_ABI</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  // This type captures the state of the gptr / pptr pointers as offsets</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  // so they can be restored in another object after moving the string.</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  struct __xfer_bufptrs</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>  __xfer_bufptrs(const basic_stringbuf& __from, basic_stringbuf* __to)</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  : _M_to{__to}, _M_goff{-1, -1, -1}, _M_poff{-1, -1, -1}</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  {</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  const _CharT* const __str = __from._M_string.data();</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  const _CharT* __end = nullptr;</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  if (__from.eback())</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  {</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  _M_goff[0] = __from.eback() - __str;</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  _M_goff[1] = __from.gptr() - __str;</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  _M_goff[2] = __from.egptr() - __str;</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  __end = __from.egptr();</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  }</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  if (__from.pbase())</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>  _M_poff[0] = __from.pbase() - __str;</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  _M_poff[1] = __from.pptr() - __from.pbase();</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  _M_poff[2] = __from.epptr() - __str;</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  if (__from.pptr() > __end)</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  __end = __from.pptr();</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  }</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span> </div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  // Set _M_string length to the greater of the get and put areas.</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  if (__end)</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>  // The const_cast avoids changing this constructor's signature,</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  // because it is exported from the dynamic library.</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  auto& __mut_from = const_cast<basic_stringbuf&>(__from);</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  __mut_from._M_string._M_length(__end - __str);</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>  }</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span> </div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  ~__xfer_bufptrs()</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  {</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  char_type* __str = const_cast<char_type*>(_M_to->_M_string.data());</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  if (_M_goff[0] != -1)</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  _M_to->setg(__str+_M_goff[0], __str+_M_goff[1], __str+_M_goff[2]);</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  if (_M_poff[0] != -1)</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  _M_to->_M_pbump(__str+_M_poff[0], __str+_M_poff[2], _M_poff[1]);</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</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>  basic_stringbuf* _M_to;</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  off_type _M_goff[3];</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  off_type _M_poff[3];</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  };</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span> #else</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  // This type does nothing when using Copy-On-Write strings.</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  struct __xfer_bufptrs</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  {</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  __xfer_bufptrs(const basic_stringbuf&, basic_stringbuf*) { }</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  };</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span> #endif</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>  // The move constructor initializes an __xfer_bufptrs temporary then</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  // delegates to this constructor to performs moves during its lifetime.</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  basic_stringbuf(basic_stringbuf&& __rhs, __xfer_bufptrs&&)</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  : __streambuf_type(static_cast<const __streambuf_type&>(__rhs)),</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  _M_mode(__rhs._M_mode), _M_string(std::move(__rhs._M_string))</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  { }</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span> #endif</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  };</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span> </div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span> </div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  // [27.7.2] Template class basic_istringstream</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>  * @brief Controlling input for std::string.</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  * @ingroup io</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  *</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  * @tparam _CharT Type of character stream.</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  * @tparam _Traits Traits for character type, defaults to</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  * char_traits<_CharT>.</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  *</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  * This class supports reading from objects of type std::basic_string,</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  * using the inherited functions from std::basic_istream. To control</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  * the associated sequence, an instance of std::basic_stringbuf is used,</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  * which this page refers to as @c sb.</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>  template<typename _CharT, typename _Traits, typename _Alloc></div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  class basic_istringstream : public basic_istream<_CharT, _Traits></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>  public:</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  // Types:</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  typedef _CharT char_type;</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  typedef _Traits traits_type;</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  // 251. basic_stringbuf missing allocator_type</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  typedef _Alloc allocator_type;</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  typedef typename traits_type::int_type int_type;</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  typedef typename traits_type::pos_type pos_type;</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  typedef typename traits_type::off_type off_type;</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span> </div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  // Non-standard types:</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  typedef basic_string<_CharT, _Traits, _Alloc> __string_type;</div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  typedef basic_istream<char_type, traits_type> __istream_type;</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>  private:</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  __stringbuf_type _M_stringbuf;</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span> </div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  public:</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  // Constructors:</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  /**</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  * @brief Default constructor starts with an empty string buffer.</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  * @param __mode Whether the buffer can read, or write, or both.</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  *</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  * @c ios_base::in is automatically included in @a __mode.</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>  * Initializes @c sb using @c __mode|in, and passes @c &sb to the base</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  * class initializer. Does not allocate any buffer.</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  *</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  * That's a lie. We initialize the base class with NULL, because the</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  * string class does its own memory management.</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  */</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  explicit</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  basic_istringstream(ios_base::openmode __mode = ios_base::in)</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  : __istream_type(), _M_stringbuf(__mode | ios_base::in)</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  { this->init(&_M_stringbuf); }</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span> </div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  /**</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  * @brief Starts with an existing string buffer.</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  * @param __str A string to copy as a starting buffer.</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  * @param __mode Whether the buffer can read, or write, or both.</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>  * @c ios_base::in is automatically included in @a mode.</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>  * Initializes @c sb using @a str and @c mode|in, and passes @c &sb</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  * to the base class initializer.</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  *</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  * That's a lie. We initialize the base class with NULL, because the</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  * string class does its own memory management.</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>  explicit</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  basic_istringstream(const __string_type& __str,</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  ios_base::openmode __mode = ios_base::in)</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  : __istream_type(), _M_stringbuf(__str, __mode | ios_base::in)</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  { this->init(&_M_stringbuf); }</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span> </div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  /**</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  * @brief The destructor does nothing.</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  *</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  * The buffer is deallocated by the stringbuf object, not the</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  * formatting stream.</div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  */</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  ~basic_istringstream()</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  { }</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span> </div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  basic_istringstream(const basic_istringstream&) = delete;</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span> </div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  basic_istringstream(basic_istringstream&& __rhs)</div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  : __istream_type(std::move(__rhs)),</div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  _M_stringbuf(std::move(__rhs._M_stringbuf))</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  { __istream_type::set_rdbuf(&_M_stringbuf); }</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span> </div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  // 27.8.3.2 Assign and swap:</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>  basic_istringstream&</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  operator=(const basic_istringstream&) = delete;</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span> </div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  basic_istringstream&</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  operator=(basic_istringstream&& __rhs)</div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  {</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  __istream_type::operator=(std::move(__rhs));</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  _M_stringbuf = std::move(__rhs._M_stringbuf);</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  return *this;</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  }</div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span> </div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  void</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  swap(basic_istringstream& __rhs)</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  {</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  __istream_type::swap(__rhs);</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  _M_stringbuf.swap(__rhs._M_stringbuf);</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  }</div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span> #endif</div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span> </div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  // Members:</div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  /**</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  * @brief Accessing the underlying buffer.</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  * @return The current basic_stringbuf buffer.</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  *</div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  * This hides both signatures of std::basic_ios::rdbuf().</div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  */</div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  __stringbuf_type*</div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  rdbuf() const</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  { return const_cast<__stringbuf_type*>(&_M_stringbuf); }</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> </div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  /**</div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  * @brief Copying out the string buffer.</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  * @return @c rdbuf()->str()</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  */</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  __string_type</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  str() const</div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  { return _M_stringbuf.str(); }</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span> </div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  /**</div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  * @brief Setting a new buffer.</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  * @param __s The string to use as a new sequence.</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  *</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  * Calls @c rdbuf()->str(s).</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  */</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  void</div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  str(const __string_type& __s)</div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  { _M_stringbuf.str(__s); }</div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  };</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span> </div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span> </div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  // [27.7.3] Template class basic_ostringstream</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  /**</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  * @brief Controlling output for std::string.</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  * @ingroup io</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  *</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  * @tparam _CharT Type of character stream.</div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  * @tparam _Traits Traits for character type, defaults to</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  * char_traits<_CharT>.</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.</div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  *</div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  * This class supports writing to objects of type std::basic_string,</div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  * using the inherited functions from std::basic_ostream. To control</div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  * the associated sequence, an instance of std::basic_stringbuf is used,</div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  * which this page refers to as @c sb.</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  */</div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  template <typename _CharT, typename _Traits, typename _Alloc></div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  class basic_ostringstream : public basic_ostream<_CharT, _Traits></div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  {</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  public:</div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  // Types:</div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  typedef _CharT char_type;</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  typedef _Traits traits_type;</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  // 251. basic_stringbuf missing allocator_type</div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  typedef _Alloc allocator_type;</div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  typedef typename traits_type::int_type int_type;</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  typedef typename traits_type::pos_type pos_type;</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  typedef typename traits_type::off_type off_type;</div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span> </div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  // Non-standard types:</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  typedef basic_string<_CharT, _Traits, _Alloc> __string_type;</div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  typedef basic_ostream<char_type, traits_type> __ostream_type;</div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span> </div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  private:</div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  __stringbuf_type _M_stringbuf;</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span> </div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  public:</div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  // Constructors/destructor:</div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  /**</div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  * @brief Default constructor starts with an empty string buffer.</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  * @param __mode Whether the buffer can read, or write, or both.</div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  *</div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  * @c ios_base::out is automatically included in @a mode.</div><div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  *</div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  * Initializes @c sb using @c mode|out, and passes @c &sb to the base</div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  * class initializer. Does not allocate any buffer.</div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  *</div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  * That's a lie. We initialize the base class with NULL, because the</div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  * string class does its own memory management.</div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  */</div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  explicit</div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  basic_ostringstream(ios_base::openmode __mode = ios_base::out)</div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  : __ostream_type(), _M_stringbuf(__mode | ios_base::out)</div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  { this->init(&_M_stringbuf); }</div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span> </div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  /**</div><div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  * @brief Starts with an existing string buffer.</div><div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  * @param __str A string to copy as a starting buffer.</div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  * @param __mode Whether the buffer can read, or write, or both.</div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  *</div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  * @c ios_base::out is automatically included in @a mode.</div><div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  *</div><div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  * Initializes @c sb using @a str and @c mode|out, and passes @c &sb</div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  * to the base class initializer.</div><div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  *</div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  * That's a lie. We initialize the base class with NULL, because the</div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  * string class does its own memory management.</div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  */</div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  explicit</div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  basic_ostringstream(const __string_type& __str,</div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  ios_base::openmode __mode = ios_base::out)</div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  : __ostream_type(), _M_stringbuf(__str, __mode | ios_base::out)</div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  { this->init(&_M_stringbuf); }</div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span> </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>  * @brief The destructor does nothing.</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>  * The buffer is deallocated by the stringbuf object, not the</div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  * formatting stream.</div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  */</div><div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  ~basic_ostringstream()</div><div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  { }</div><div class="line"><a name="l00592"></a><span class="lineno"> 592</span> </div><div class="line"><a name="l00593"></a><span class="lineno"> 593</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  basic_ostringstream(const basic_ostringstream&) = delete;</div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span> </div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  basic_ostringstream(basic_ostringstream&& __rhs)</div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  : __ostream_type(std::move(__rhs)),</div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  _M_stringbuf(std::move(__rhs._M_stringbuf))</div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  { __ostream_type::set_rdbuf(&_M_stringbuf); }</div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span> </div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  // 27.8.3.2 Assign and swap:</div><div class="line"><a name="l00602"></a><span class="lineno"> 602</span> </div><div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  basic_ostringstream&</div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  operator=(const basic_ostringstream&) = delete;</div><div class="line"><a name="l00605"></a><span class="lineno"> 605</span> </div><div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  basic_ostringstream&</div><div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  operator=(basic_ostringstream&& __rhs)</div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  {</div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  __ostream_type::operator=(std::move(__rhs));</div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  _M_stringbuf = std::move(__rhs._M_stringbuf);</div><div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  return *this;</div><div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  }</div><div class="line"><a name="l00613"></a><span class="lineno"> 613</span> </div><div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  void</div><div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  swap(basic_ostringstream& __rhs)</div><div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  {</div><div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  __ostream_type::swap(__rhs);</div><div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  _M_stringbuf.swap(__rhs._M_stringbuf);</div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  }</div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span> #endif</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span> </div><div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  // Members:</div><div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  /**</div><div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  * @brief Accessing the underlying buffer.</div><div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  * @return The current basic_stringbuf buffer.</div><div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  *</div><div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  * This hides both signatures of std::basic_ios::rdbuf().</div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  */</div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  __stringbuf_type*</div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  rdbuf() const</div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  { return const_cast<__stringbuf_type*>(&_M_stringbuf); }</div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span> </div><div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  /**</div><div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  * @brief Copying out the string buffer.</div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  * @return @c rdbuf()->str()</div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  */</div><div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  __string_type</div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  str() const</div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  { return _M_stringbuf.str(); }</div><div class="line"><a name="l00640"></a><span class="lineno"> 640</span> </div><div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  /**</div><div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  * @brief Setting a new buffer.</div><div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  * @param __s The string to use as a new sequence.</div><div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  *</div><div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  * Calls @c rdbuf()->str(s).</div><div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  */</div><div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  void</div><div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  str(const __string_type& __s)</div><div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  { _M_stringbuf.str(__s); }</div><div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  };</div><div class="line"><a name="l00651"></a><span class="lineno"> 651</span> </div><div class="line"><a name="l00652"></a><span class="lineno"> 652</span> </div><div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  // [27.7.4] Template class basic_stringstream</div><div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  /**</div><div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  * @brief Controlling input and output for std::string.</div><div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  * @ingroup io</div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  *</div><div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  * @tparam _CharT Type of character stream.</div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  * @tparam _Traits Traits for character type, defaults to</div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  * char_traits<_CharT>.</div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.</div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  *</div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  * This class supports reading from and writing to objects of type</div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  * std::basic_string, using the inherited functions from</div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  * std::basic_iostream. To control the associated sequence, an instance</div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  * of std::basic_stringbuf is used, which this page refers to as @c sb.</div><div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  */</div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  template <typename _CharT, typename _Traits, typename _Alloc></div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  class basic_stringstream : public basic_iostream<_CharT, _Traits></div><div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  {</div><div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  public:</div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  // Types:</div><div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  typedef _CharT char_type;</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  typedef _Traits traits_type;</div><div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  // 251. basic_stringbuf missing allocator_type</div><div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  typedef _Alloc allocator_type;</div><div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  typedef typename traits_type::int_type int_type;</div><div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  typedef typename traits_type::pos_type pos_type;</div><div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  typedef typename traits_type::off_type off_type;</div><div class="line"><a name="l00681"></a><span class="lineno"> 681</span> </div><div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  // Non-standard Types:</div><div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  typedef basic_string<_CharT, _Traits, _Alloc> __string_type;</div><div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;</div><div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  typedef basic_iostream<char_type, traits_type> __iostream_type;</div><div class="line"><a name="l00686"></a><span class="lineno"> 686</span> </div><div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  private:</div><div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  __stringbuf_type _M_stringbuf;</div><div class="line"><a name="l00689"></a><span class="lineno"> 689</span> </div><div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  public:</div><div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  // Constructors/destructors</div><div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  /**</div><div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  * @brief Default constructor starts with an empty string buffer.</div><div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  * @param __m Whether the buffer can read, or write, or both.</div><div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  *</div><div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  * Initializes @c sb using the mode from @c __m, and passes @c</div><div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  * &sb to the base class initializer. Does not allocate any</div><div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  * buffer.</div><div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  *</div><div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  * That's a lie. We initialize the base class with NULL, because the</div><div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  * string class does its own memory management.</div><div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  */</div><div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  explicit</div><div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  basic_stringstream(ios_base::openmode __m = ios_base::out | ios_base::in)</div><div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  : __iostream_type(), _M_stringbuf(__m)</div><div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  { this->init(&_M_stringbuf); }</div><div class="line"><a name="l00707"></a><span class="lineno"> 707</span> </div><div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  /**</div><div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  * @brief Starts with an existing string buffer.</div><div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  * @param __str A string to copy as a starting buffer.</div><div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  * @param __m Whether the buffer can read, or write, or both.</div><div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  *</div><div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  * Initializes @c sb using @a __str and @c __m, and passes @c &sb</div><div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  * to the base class initializer.</div><div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  *</div><div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  * That's a lie. We initialize the base class with NULL, because the</div><div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  * string class does its own memory management.</div><div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  */</div><div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  explicit</div><div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  basic_stringstream(const __string_type& __str,</div><div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  ios_base::openmode __m = ios_base::out | ios_base::in)</div><div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  : __iostream_type(), _M_stringbuf(__str, __m)</div><div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  { this->init(&_M_stringbuf); }</div><div class="line"><a name="l00724"></a><span class="lineno"> 724</span> </div><div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  /**</div><div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  * @brief The destructor does nothing.</div><div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  *</div><div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  * The buffer is deallocated by the stringbuf object, not the</div><div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  * formatting stream.</div><div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  */</div><div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  ~basic_stringstream()</div><div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  { }</div><div class="line"><a name="l00733"></a><span class="lineno"> 733</span> </div><div class="line"><a name="l00734"></a><span class="lineno"> 734</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  basic_stringstream(const basic_stringstream&) = delete;</div><div class="line"><a name="l00736"></a><span class="lineno"> 736</span> </div><div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  basic_stringstream(basic_stringstream&& __rhs)</div><div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  : __iostream_type(std::move(__rhs)),</div><div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  _M_stringbuf(std::move(__rhs._M_stringbuf))</div><div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  { __iostream_type::set_rdbuf(&_M_stringbuf); }</div><div class="line"><a name="l00741"></a><span class="lineno"> 741</span> </div><div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  // 27.8.3.2 Assign and swap:</div><div class="line"><a name="l00743"></a><span class="lineno"> 743</span> </div><div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  basic_stringstream&</div><div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  operator=(const basic_stringstream&) = delete;</div><div class="line"><a name="l00746"></a><span class="lineno"> 746</span> </div><div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  basic_stringstream&</div><div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  operator=(basic_stringstream&& __rhs)</div><div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  {</div><div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  __iostream_type::operator=(std::move(__rhs));</div><div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  _M_stringbuf = std::move(__rhs._M_stringbuf);</div><div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  return *this;</div><div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  }</div><div class="line"><a name="l00754"></a><span class="lineno"> 754</span> </div><div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  void</div><div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  swap(basic_stringstream& __rhs)</div><div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  {</div><div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  __iostream_type::swap(__rhs);</div><div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  _M_stringbuf.swap(__rhs._M_stringbuf);</div><div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  }</div><div class="line"><a name="l00761"></a><span class="lineno"> 761</span> #endif</div><div class="line"><a name="l00762"></a><span class="lineno"> 762</span> </div><div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  // Members:</div><div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  /**</div><div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  * @brief Accessing the underlying buffer.</div><div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  * @return The current basic_stringbuf buffer.</div><div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  *</div><div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  * This hides both signatures of std::basic_ios::rdbuf().</div><div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  */</div><div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  __stringbuf_type*</div><div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  rdbuf() const</div><div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  { return const_cast<__stringbuf_type*>(&_M_stringbuf); }</div><div class="line"><a name="l00773"></a><span class="lineno"> 773</span> </div><div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  /**</div><div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  * @brief Copying out the string buffer.</div><div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  * @return @c rdbuf()->str()</div><div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  */</div><div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  __string_type</div><div class="line"><a name="l00779"></a><span class="lineno"> 779</span>  str() const</div><div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  { return _M_stringbuf.str(); }</div><div class="line"><a name="l00781"></a><span class="lineno"> 781</span> </div><div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  /**</div><div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  * @brief Setting a new buffer.</div><div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  * @param __s The string to use as a new sequence.</div><div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  *</div><div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  * Calls @c rdbuf()->str(s).</div><div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  */</div><div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  void</div><div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  str(const __string_type& __s)</div><div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  { _M_stringbuf.str(__s); }</div><div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  };</div><div class="line"><a name="l00792"></a><span class="lineno"> 792</span> </div><div class="line"><a name="l00793"></a><span class="lineno"> 793</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  /// Swap specialization for stringbufs.</div><div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  template <class _CharT, class _Traits, class _Allocator></div><div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  inline void</div><div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  swap(basic_stringbuf<_CharT, _Traits, _Allocator>& __x,</div><div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  basic_stringbuf<_CharT, _Traits, _Allocator>& __y)</div><div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  { __x.swap(__y); }</div><div class="line"><a name="l00800"></a><span class="lineno"> 800</span> </div><div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  /// Swap specialization for istringstreams.</div><div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  template <class _CharT, class _Traits, class _Allocator></div><div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  inline void</div><div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  swap(basic_istringstream<_CharT, _Traits, _Allocator>& __x,</div><div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  basic_istringstream<_CharT, _Traits, _Allocator>& __y)</div><div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  { __x.swap(__y); }</div><div class="line"><a name="l00807"></a><span class="lineno"> 807</span> </div><div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  /// Swap specialization for ostringstreams.</div><div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  template <class _CharT, class _Traits, class _Allocator></div><div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  inline void</div><div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  swap(basic_ostringstream<_CharT, _Traits, _Allocator>& __x,</div><div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  basic_ostringstream<_CharT, _Traits, _Allocator>& __y)</div><div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  { __x.swap(__y); }</div><div class="line"><a name="l00814"></a><span class="lineno"> 814</span> </div><div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  /// Swap specialization for stringstreams.</div><div class="line"><a name="l00816"></a><span class="lineno"> 816</span>  template <class _CharT, class _Traits, class _Allocator></div><div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  inline void</div><div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  swap(basic_stringstream<_CharT, _Traits, _Allocator>& __x,</div><div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  basic_stringstream<_CharT, _Traits, _Allocator>& __y)</div><div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  { __x.swap(__y); }</div><div class="line"><a name="l00821"></a><span class="lineno"> 821</span> #endif</div><div class="line"><a name="l00822"></a><span class="lineno"> 822</span> </div><div class="line"><a name="l00823"></a><span class="lineno"> 823</span> _GLIBCXX_END_NAMESPACE_CXX11</div><div class="line"><a name="l00824"></a><span class="lineno"> 824</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00825"></a><span class="lineno"> 825</span> } // namespace</div><div class="line"><a name="l00826"></a><span class="lineno"> 826</span> </div><div class="line"><a name="l00827"></a><span class="lineno"> 827</span> #include <bits/sstream.tcc></div><div class="line"><a name="l00828"></a><span class="lineno"> 828</span> </div><div class="line"><a name="l00829"></a><span class="lineno"> 829</span> #endif /* _GLIBCXX_SSTREAM */</div></div><!-- fragment --></div><!-- contents -->
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