<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.15"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>libstdc++: fstream Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtreedata.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(document).ready(initResizable);
/* @license-end */</script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">libstdc++
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.15 -->
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
<div id="nav-sync" class="sync"></div>
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(document).ready(function(){initNavTree('a00068_source.html','');});
/* @license-end */
</script>
<div id="doc-content">
<div class="header">
<div class="headertitle">
<div class="title">fstream</div> </div>
</div><!--header-->
<div class="contents">
<a href="a00068.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> // File 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/fstream</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: 27.8 File-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_FSTREAM</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> #define _GLIBCXX_FSTREAM 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> #include <bits/codecvt.h></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> #include <cstdio> // For BUFSIZ</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> #include <bits/basic_file.h> // For __basic_file, __c_lock</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> #include <string> // For std::string overloads.</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> #endif</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> namespace std _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> {</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</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> #if __cplusplus >= 201703L</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  // Enable if _Path is a filesystem::path or experimental::filesystem::path</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  template<typename _Path, typename _Result = _Path, typename _Path2</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  = decltype(std::declval<_Path&>().make_preferred().filename())></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  using _If_fs_path = enable_if_t<is_same_v<_Path, _Path2>, _Result>;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> #endif // C++17</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  // [27.8.1.1] template class basic_filebuf</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  /**</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  * @brief The actual work of input and output (for files).</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  * @ingroup io</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>  * @tparam _CharT Type of character stream.</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  * @tparam _Traits Traits for character type, defaults to</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  * char_traits<_CharT>.</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  *</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  * This class associates both its input and output sequence with an</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  * external disk file, and maintains a joint file position for both</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  * sequences. Many of its semantics are described in terms of similar</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  * behavior in the Standard C Library's @c FILE streams.</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  *</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  * Requirements on traits_type, specific to this class:</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  * - traits_type::pos_type must be fpos<traits_type::state_type></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  * - traits_type::off_type must be streamoff</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  * - traits_type::state_type must be Assignable and DefaultConstructible,</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  * - traits_type::state_type() must be the initial state for codecvt.</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>  template<typename _CharT, typename _Traits></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  class basic_filebuf : public basic_streambuf<_CharT, _Traits></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  {</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  template<typename _Tp></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  using __chk_state = __and_<is_copy_assignable<_Tp>,</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  is_copy_constructible<_Tp>,</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  is_default_constructible<_Tp>>;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  static_assert(__chk_state<typename _Traits::state_type>::value,</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  "state_type must be CopyAssignable, CopyConstructible"</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  " and DefaultConstructible");</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  static_assert(is_same<typename _Traits::pos_type,</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  fpos<typename _Traits::state_type>>::value,</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  "pos_type must be fpos<state_type>");</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> #endif</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  public:</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  // Types:</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  typedef _CharT char_type;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  typedef _Traits traits_type;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  typedef typename traits_type::int_type int_type;</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  typedef typename traits_type::pos_type pos_type;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  typedef typename traits_type::off_type off_type;</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>  typedef basic_streambuf<char_type, traits_type> __streambuf_type;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  typedef basic_filebuf<char_type, traits_type> __filebuf_type;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  typedef __basic_file<char> __file_type;</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  typedef typename traits_type::state_type __state_type;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  typedef codecvt<char_type, char, __state_type> __codecvt_type;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  friend class ios_base; // For sync_with_stdio.</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>  protected:</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  // Data Members:</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  // MT lock inherited from libio or other low-level io library.</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  __c_lock _M_lock;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  // External buffer.</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  __file_type _M_file;</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>  /// Place to stash in || out || in | out settings for current filebuf.</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  ios_base::openmode _M_mode;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  // Beginning state type for codecvt.</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  __state_type _M_state_beg;</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>  // During output, the state that corresponds to pptr(),</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  // during input, the state that corresponds to egptr() and</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  // _M_ext_next.</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  __state_type _M_state_cur;</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>  // Not used for output. During input, the state that corresponds</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  // to eback() and _M_ext_buf.</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  __state_type _M_state_last;</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> </div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  /// Pointer to the beginning of internal buffer.</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  char_type* _M_buf;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> </div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  /**</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  * Actual size of internal buffer. This number is equal to the size</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  * of the put area + 1 position, reserved for the overflow char of</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  * a full area.</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>  size_t _M_buf_size;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  // Set iff _M_buf is allocated memory from _M_allocate_internal_buffer.</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  bool _M_buf_allocated;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</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>  * _M_reading == false && _M_writing == false for @b uncommitted mode;</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  * _M_reading == true for @b read mode;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  * _M_writing == true for @b write mode;</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  *</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  * NB: _M_reading == true && _M_writing == true is unused.</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>  bool _M_reading;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  bool _M_writing;</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </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>  /**</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  * Necessary bits for putback buffer management.</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>  * @note pbacks of over one character are not currently supported.</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  */</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  char_type _M_pback;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  char_type* _M_pback_cur_save;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  char_type* _M_pback_end_save;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  bool _M_pback_init;</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> </div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  // Cached codecvt facet.</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  const __codecvt_type* _M_codecvt;</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>  /**</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  * Buffer for external characters. Used for input when</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  * codecvt::always_noconv() == false. When valid, this corresponds</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  * to eback().</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>  char* _M_ext_buf;</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>  /**</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  * Size of buffer held by _M_ext_buf.</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>  streamsize _M_ext_buf_size;</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> </div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  /**</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  * Pointers into the buffer held by _M_ext_buf that delimit a</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  * subsequence of bytes that have been read but not yet converted.</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  * When valid, _M_ext_next corresponds to egptr().</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>  const char* _M_ext_next;</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  char* _M_ext_end;</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>  /**</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  * Initializes pback buffers, and moves normal buffers to safety.</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  * Assumptions:</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  * _M_in_cur has already been moved back</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>  void</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  _M_create_pback()</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  {</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  if (!_M_pback_init)</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  {</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  _M_pback_cur_save = this->gptr();</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  _M_pback_end_save = this->egptr();</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  this->setg(&_M_pback, &_M_pback, &_M_pback + 1);</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  _M_pback_init = true;</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</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> </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>  * Deactivates pback buffer contents, and restores normal buffer.</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  * Assumptions:</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  * The pback buffer has only moved forward.</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  */</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  void</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  _M_destroy_pback() throw()</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>  if (_M_pback_init)</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>  // Length _M_in_cur moved in the pback buffer.</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  _M_pback_cur_save += this->gptr() != this->eback();</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  this->setg(_M_buf, _M_pback_cur_save, _M_pback_end_save);</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  _M_pback_init = false;</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  }</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> </div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  public:</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  // Constructors/destructor:</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  /**</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  * @brief Does not open any files.</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>  * The default constructor initializes the parent class using its</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  * own default ctor.</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  */</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  basic_filebuf();</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  basic_filebuf(const basic_filebuf&) = delete;</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  basic_filebuf(basic_filebuf&&);</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> #endif</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> </div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  /**</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  * @brief The destructor closes the file first.</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  */</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  virtual</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  ~basic_filebuf()</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  { this->close(); }</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  basic_filebuf& operator=(const basic_filebuf&) = delete;</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  basic_filebuf& operator=(basic_filebuf&&);</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  void swap(basic_filebuf&);</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> #endif</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> </div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  // Members:</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  /**</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  * @brief Returns true if the external file is open.</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>  bool</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  is_open() const throw()</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  { return _M_file.is_open(); }</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  /**</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  * @brief Opens an external file.</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  * @param __s The name of the file.</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  * @return @c this on success, NULL on failure</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  *</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  * If a file is already open, this function immediately fails.</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  * Otherwise it tries to open the file named @a __s using the flags</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  * given in @a __mode.</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  *</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  * Table 92, adapted here, gives the relation between openmode</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  * combinations and the equivalent @c fopen() flags.</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  * (NB: lines app, in|out|app, in|app, binary|app, binary|in|out|app,</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  * and binary|in|app per DR 596)</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  * <pre></div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  * +---------------------------------------------------------+</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  * | ios_base Flag combination stdio equivalent |</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  * |binary in out trunc app |</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  * +---------------------------------------------------------+</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  * | + w |</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  * | + + a |</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  * | + a |</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  * | + + w |</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  * | + r |</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  * | + + r+ |</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  * | + + + w+ |</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  * | + + + a+ |</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  * | + + a+ |</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  * +---------------------------------------------------------+</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  * | + + wb |</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  * | + + + ab |</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  * | + + ab |</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  * | + + + wb |</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  * | + + rb |</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  * | + + + r+b |</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  * | + + + + w+b |</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  * | + + + + a+b |</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  * | + + + a+b |</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  * +---------------------------------------------------------+</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  * </pre></div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  */</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  __filebuf_type*</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  open(const char* __s, ios_base::openmode __mode);</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span> </div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  /**</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  * @brief Opens an external file.</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  * @param __s The name of the file.</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  * @return @c this on success, NULL on failure</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  */</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  __filebuf_type*</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  open(const std::string& __s, ios_base::openmode __mode)</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  { return open(__s.c_str(), __mode); }</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> </div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span> #if __cplusplus >= 201703L</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  /**</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  * @brief Opens an external file.</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  * @param __s The name of the file, as a filesystem::path.</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  * @return @c this on success, NULL on failure</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  */</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  template<typename _Path></div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  _If_fs_path<_Path, __filebuf_type*></div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  open(const _Path& __s, ios_base::openmode __mode)</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  { return open(__s.c_str(), __mode); }</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span> #endif // C++17</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span> #endif // C++11</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>  * @brief Closes the currently associated file.</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  * @return @c this on success, NULL on failure</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>  * If no file is currently open, this function immediately fails.</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  *</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  * If a <em>put buffer area</em> exists, @c overflow(eof) is</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  * called to flush all the characters. The file is then</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  * closed.</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>  * If any operations fail, this function also fails.</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  */</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  __filebuf_type*</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  close();</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>  protected:</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  void</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  _M_allocate_internal_buffer();</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>  void</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  _M_destroy_internal_buffer() throw();</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span> </div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  // [27.8.1.4] overridden virtual functions</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  virtual streamsize</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  showmanyc();</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> </div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  // Stroustrup, 1998, p. 628</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  // underflow() and uflow() functions are called to get the next</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  // character from the real input source when the buffer is empty.</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  // Buffered input uses underflow()</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>  virtual int_type</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  underflow();</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span> </div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  virtual int_type</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  pbackfail(int_type __c = _Traits::eof());</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span> </div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  // Stroustrup, 1998, p 648</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  // The overflow() function is called to transfer characters to the</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  // real output destination when the buffer is full. A call to</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  // overflow(c) outputs the contents of the buffer plus the</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  // character c.</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  // 27.5.2.4.5</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  // Consume some sequence of the characters in the pending sequence.</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  virtual int_type</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  overflow(int_type __c = _Traits::eof());</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span> </div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  // Convert internal byte sequence to external, char-based</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  // sequence via codecvt.</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  bool</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  _M_convert_to_external(char_type*, streamsize);</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  /**</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  * @brief Manipulates the buffer.</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  * @param __s Pointer to a buffer area.</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  * @param __n Size of @a __s.</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  * @return @c this</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  *</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  * If no file has been opened, and both @a __s and @a __n are zero, then</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  * the stream becomes unbuffered. Otherwise, @c __s is used as a</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  * buffer; see</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  * https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  * for more.</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  */</div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  virtual __streambuf_type*</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  setbuf(char_type* __s, streamsize __n);</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>  virtual pos_type</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  seekoff(off_type __off, ios_base::seekdir __way,</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  ios_base::openmode __mode = ios_base::in | ios_base::out);</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  virtual pos_type</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  seekpos(pos_type __pos,</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  ios_base::openmode __mode = ios_base::in | ios_base::out);</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> </div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  // Common code for seekoff, seekpos, and overflow</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  pos_type</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  _M_seek(off_type __off, ios_base::seekdir __way, __state_type __state);</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span> </div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  int</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  _M_get_ext_pos(__state_type &__state);</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span> </div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  virtual int</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  sync();</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span> </div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  virtual void</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  imbue(const locale& __loc);</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span> </div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  virtual streamsize</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  xsgetn(char_type* __s, streamsize __n);</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span> </div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  virtual streamsize</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  xsputn(const char_type* __s, streamsize __n);</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>  // Flushes output buffer, then writes unshift sequence.</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  bool</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  _M_terminate_output();</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span> </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>  * This function sets the pointers of the internal buffer, both get</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  * and put areas. Typically:</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>  * __off == egptr() - eback() upon underflow/uflow (@b read mode);</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  * __off == 0 upon overflow (@b write mode);</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  * __off == -1 upon open, setbuf, seekoff/pos (@b uncommitted mode).</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  *</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  * NB: epptr() - pbase() == _M_buf_size - 1, since _M_buf_size</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  * reflects the actual allocated memory and the last cell is reserved</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  * for the overflow char of a full put area.</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  */</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  void</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  _M_set_buffer(streamsize __off)</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  {</div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  const bool __testin = _M_mode & ios_base::in;</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  const bool __testout = (_M_mode & ios_base::out</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  || _M_mode & ios_base::app);</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 (__testin && __off > 0)</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  this->setg(_M_buf, _M_buf, _M_buf + __off);</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  else</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  this->setg(_M_buf, _M_buf, _M_buf);</div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span> </div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  if (__testout && __off == 0 && _M_buf_size > 1 )</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  this->setp(_M_buf, _M_buf + _M_buf_size - 1);</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  else</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  this->setp(0, 0);</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>  };</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span> </div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  // [27.8.1.5] Template class basic_ifstream</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  /**</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  * @brief Controlling input for files.</div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  * @ingroup io</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  *</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  * @tparam _CharT Type of character stream.</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  * @tparam _Traits Traits for character type, defaults to</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  * char_traits<_CharT>.</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>  * This class supports reading from named files, using the inherited</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  * functions from std::basic_istream. To control the associated</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  * sequence, an instance of std::basic_filebuf is used, which this page</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  * refers to as @c sb.</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  */</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  template<typename _CharT, typename _Traits></div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  class basic_ifstream : public basic_istream<_CharT, _Traits></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>  public:</div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  // Types:</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  typedef _CharT char_type;</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  typedef _Traits traits_type;</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  typedef typename traits_type::int_type int_type;</div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  typedef typename traits_type::pos_type pos_type;</div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  typedef typename traits_type::off_type off_type;</div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span> </div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  // Non-standard types:</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  typedef basic_filebuf<char_type, traits_type> __filebuf_type;</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  typedef basic_istream<char_type, traits_type> __istream_type;</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>  private:</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  __filebuf_type _M_filebuf;</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>  public:</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  // Constructors/Destructors:</div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  /**</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  * @brief Default constructor.</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>  * Initializes @c sb using its default constructor, and passes</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  * @c &sb to the base class initializer. Does not open any files</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  * (you haven't given it a filename to open).</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  */</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  basic_ifstream() : __istream_type(), _M_filebuf()</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  { this->init(&_M_filebuf); }</div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span> </div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  /**</div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  * @brief Create an input file stream.</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  * @param __s Null terminated string specifying the filename.</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  * @param __mode Open file in specified mode (see std::ios_base).</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  *</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  * @c ios_base::in is automatically included in @a __mode.</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  */</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  explicit</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in)</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  : __istream_type(), _M_filebuf()</div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  {</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  this->init(&_M_filebuf);</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  this->open(__s, __mode);</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> </div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  /**</div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  * @brief Create an input file stream.</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  * @param __s std::string specifying the filename.</div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  * @param __mode Open file in specified mode (see std::ios_base).</div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  *</div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  * @c ios_base::in is automatically included in @a __mode.</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  */</div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  explicit</div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  basic_ifstream(const std::string& __s,</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  ios_base::openmode __mode = ios_base::in)</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  : __istream_type(), _M_filebuf()</div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  {</div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  this->init(&_M_filebuf);</div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  this->open(__s, __mode);</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  }</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span> </div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span> #if __cplusplus >= 201703L</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  /**</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  * @param Create an input file stream.</div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  * @param __s filesystem::path specifying the filename.</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  * @param __mode Open file in specified mode (see std::ios_base).</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>  * @c ios_base::in is automatically included in @a __mode.</div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  */</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  template<typename _Path, typename _Require = _If_fs_path<_Path>></div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  basic_ifstream(const _Path& __s,</div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  ios_base::openmode __mode = ios_base::in)</div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  : basic_ifstream(__s.c_str(), __mode)</div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  { }</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span> #endif // C++17</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>  basic_ifstream(const basic_ifstream&) = delete;</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>  basic_ifstream(basic_ifstream&& __rhs)</div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  : __istream_type(std::move(__rhs)),</div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  _M_filebuf(std::move(__rhs._M_filebuf))</div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  { __istream_type::set_rdbuf(&_M_filebuf); }</div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span> #endif // C++11</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>  /**</div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  * @brief The destructor does nothing.</div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  *</div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  * The file is closed by the filebuf object, not the formatting</div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  * stream.</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>  ~basic_ifstream()</div><div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  { }</div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span> </div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  // 27.8.3.2 Assign and swap:</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>  basic_ifstream&</div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  operator=(const basic_ifstream&) = delete;</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>  basic_ifstream&</div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  operator=(basic_ifstream&& __rhs)</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>  __istream_type::operator=(std::move(__rhs));</div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  _M_filebuf = std::move(__rhs._M_filebuf);</div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  return *this;</div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  }</div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span> </div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  void</div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  swap(basic_ifstream& __rhs)</div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  {</div><div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  __istream_type::swap(__rhs);</div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  _M_filebuf.swap(__rhs._M_filebuf);</div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  }</div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span> #endif</div><div class="line"><a name="l00590"></a><span class="lineno"> 590</span> </div><div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  // Members:</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>  * @brief Accessing the underlying buffer.</div><div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  * @return The current basic_filebuf buffer.</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>  * This hides both signatures of std::basic_ios::rdbuf().</div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  */</div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  __filebuf_type*</div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  rdbuf() const</div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  { return const_cast<__filebuf_type*>(&_M_filebuf); }</div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span> </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>  * @brief Wrapper to test for an open file.</div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  * @return @c rdbuf()->is_open()</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>  bool</div><div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  is_open()</div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  { return _M_filebuf.is_open(); }</div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span> </div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  // 365. Lack of const-qualification in clause 27</div><div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  bool</div><div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  is_open() const</div><div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  { return _M_filebuf.is_open(); }</div><div class="line"><a name="l00615"></a><span class="lineno"> 615</span> </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>  * @brief Opens an external file.</div><div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  * @param __s The name of the file.</div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  *</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  * Calls @c std::basic_filebuf::open(s,__mode|in). If that function</div><div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  * fails, @c failbit is set in the stream's error state.</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>  void</div><div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  open(const char* __s, ios_base::openmode __mode = ios_base::in)</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>  if (!_M_filebuf.open(__s, __mode | ios_base::in))</div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  this->setstate(ios_base::failbit);</div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  else</div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  // 409. Closing an fstream should clear error state</div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  this->clear();</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> </div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span> #if __cplusplus >= 201103L</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>  * @brief Opens an external file.</div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  * @param __s The name of the file.</div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  * @param __mode The open mode flags.</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>  * Calls @c std::basic_filebuf::open(__s,__mode|in). If that function</div><div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  * fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  */</div><div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  void</div><div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  open(const std::string& __s, ios_base::openmode __mode = ios_base::in)</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>  if (!_M_filebuf.open(__s, __mode | ios_base::in))</div><div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  this->setstate(ios_base::failbit);</div><div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  else</div><div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  // 409. Closing an fstream should clear error state</div><div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  this->clear();</div><div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  }</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> #if __cplusplus >= 201703L</div><div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  /**</div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  * @brief Opens an external file.</div><div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  * @param __s The name of the file, as a filesystem::path.</div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  *</div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  * Calls @c std::basic_filebuf::open(__s,__mode|in). If that function</div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  * fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  */</div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  template<typename _Path></div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  _If_fs_path<_Path, void></div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  open(const _Path& __s, ios_base::openmode __mode = ios_base::in)</div><div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  { open(__s.c_str(), __mode); }</div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span> #endif // C++17</div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span> #endif // C++11</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>  /**</div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  * @brief Close the file.</div><div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  *</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  * Calls @c std::basic_filebuf::close(). If that function</div><div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  * fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  */</div><div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  void</div><div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  close()</div><div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  {</div><div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  if (!_M_filebuf.close())</div><div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  this->setstate(ios_base::failbit);</div><div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  }</div><div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  };</div><div class="line"><a name="l00684"></a><span class="lineno"> 684</span> </div><div class="line"><a name="l00685"></a><span class="lineno"> 685</span> </div><div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  // [27.8.1.8] Template class basic_ofstream</div><div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  /**</div><div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  * @brief Controlling output for files.</div><div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  * @ingroup io</div><div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  *</div><div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  * @tparam _CharT Type of character stream.</div><div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  * @tparam _Traits Traits for character type, defaults to</div><div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  * char_traits<_CharT>.</div><div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  *</div><div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  * This class supports reading from named files, using the inherited</div><div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  * functions from std::basic_ostream. To control the associated</div><div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  * sequence, an instance of std::basic_filebuf is used, which this page</div><div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  * refers to as @c sb.</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>  template<typename _CharT, typename _Traits></div><div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  class basic_ofstream : public basic_ostream<_CharT,_Traits></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>  public:</div><div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  // Types:</div><div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  typedef _CharT char_type;</div><div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  typedef _Traits traits_type;</div><div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  typedef typename traits_type::int_type int_type;</div><div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  typedef typename traits_type::pos_type pos_type;</div><div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  typedef typename traits_type::off_type off_type;</div><div class="line"><a name="l00710"></a><span class="lineno"> 710</span> </div><div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  // Non-standard types:</div><div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  typedef basic_filebuf<char_type, traits_type> __filebuf_type;</div><div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  typedef basic_ostream<char_type, traits_type> __ostream_type;</div><div class="line"><a name="l00714"></a><span class="lineno"> 714</span> </div><div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  private:</div><div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  __filebuf_type _M_filebuf;</div><div class="line"><a name="l00717"></a><span class="lineno"> 717</span> </div><div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  public:</div><div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  // Constructors:</div><div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  /**</div><div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  * @brief Default constructor.</div><div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  *</div><div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  * Initializes @c sb using its default constructor, and passes</div><div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  * @c &sb to the base class initializer. Does not open any files</div><div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  * (you haven't given it a filename to open).</div><div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  */</div><div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  basic_ofstream(): __ostream_type(), _M_filebuf()</div><div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  { this->init(&_M_filebuf); }</div><div class="line"><a name="l00729"></a><span class="lineno"> 729</span> </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>  * @brief Create an output file stream.</div><div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  * @param __s Null terminated string specifying the filename.</div><div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  * @param __mode Open file in specified mode (see std::ios_base).</div><div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  *</div><div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  * @c ios_base::out is automatically included in @a __mode.</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>  explicit</div><div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  basic_ofstream(const char* __s,</div><div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  ios_base::openmode __mode = ios_base::out)</div><div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  : __ostream_type(), _M_filebuf()</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>  this->init(&_M_filebuf);</div><div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  this->open(__s, __mode);</div><div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  }</div><div class="line"><a name="l00745"></a><span class="lineno"> 745</span> </div><div class="line"><a name="l00746"></a><span class="lineno"> 746</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  /**</div><div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  * @brief Create an output file stream.</div><div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  * @param __s std::string specifying the filename.</div><div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  * @param __mode Open file in specified mode (see std::ios_base).</div><div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  *</div><div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  * @c ios_base::out is automatically included in @a __mode.</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>  explicit</div><div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  basic_ofstream(const std::string& __s,</div><div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  ios_base::openmode __mode = ios_base::out)</div><div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  : __ostream_type(), _M_filebuf()</div><div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  {</div><div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  this->init(&_M_filebuf);</div><div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  this->open(__s, __mode);</div><div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  }</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> #if __cplusplus >= 201703L</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>  * @param Create an output file stream.</div><div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  * @param __s filesystem::path specifying the filename.</div><div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  * @param __mode Open file in specified mode (see std::ios_base).</div><div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  *</div><div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  * @c ios_base::out is automatically included in @a __mode.</div><div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  */</div><div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  template<typename _Path, typename _Require = _If_fs_path<_Path>></div><div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  basic_ofstream(const _Path& __s,</div><div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  ios_base::openmode __mode = ios_base::out)</div><div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  : basic_ofstream(__s.c_str(), __mode)</div><div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  { }</div><div class="line"><a name="l00776"></a><span class="lineno"> 776</span> #endif // C++17</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>  basic_ofstream(const basic_ofstream&) = delete;</div><div class="line"><a name="l00779"></a><span class="lineno"> 779</span> </div><div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  basic_ofstream(basic_ofstream&& __rhs)</div><div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  : __ostream_type(std::move(__rhs)),</div><div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  _M_filebuf(std::move(__rhs._M_filebuf))</div><div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  { __ostream_type::set_rdbuf(&_M_filebuf); }</div><div class="line"><a name="l00784"></a><span class="lineno"> 784</span> #endif</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>  /**</div><div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  * @brief The destructor does nothing.</div><div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  *</div><div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  * The file is closed by the filebuf object, not the formatting</div><div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  * stream.</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>  ~basic_ofstream()</div><div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  { }</div><div class="line"><a name="l00794"></a><span class="lineno"> 794</span> </div><div class="line"><a name="l00795"></a><span class="lineno"> 795</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  // 27.8.3.2 Assign and swap:</div><div class="line"><a name="l00797"></a><span class="lineno"> 797</span> </div><div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  basic_ofstream&</div><div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  operator=(const basic_ofstream&) = delete;</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>  basic_ofstream&</div><div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  operator=(basic_ofstream&& __rhs)</div><div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  {</div><div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  __ostream_type::operator=(std::move(__rhs));</div><div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  _M_filebuf = std::move(__rhs._M_filebuf);</div><div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  return *this;</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> </div><div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  void</div><div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  swap(basic_ofstream& __rhs)</div><div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  {</div><div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  __ostream_type::swap(__rhs);</div><div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  _M_filebuf.swap(__rhs._M_filebuf);</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> #endif</div><div class="line"><a name="l00816"></a><span class="lineno"> 816</span> </div><div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  // Members:</div><div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  /**</div><div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  * @brief Accessing the underlying buffer.</div><div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  * @return The current basic_filebuf buffer.</div><div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  *</div><div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  * This hides both signatures of std::basic_ios::rdbuf().</div><div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  */</div><div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  __filebuf_type*</div><div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  rdbuf() const</div><div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  { return const_cast<__filebuf_type*>(&_M_filebuf); }</div><div class="line"><a name="l00827"></a><span class="lineno"> 827</span> </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>  * @brief Wrapper to test for an open file.</div><div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  * @return @c rdbuf()->is_open()</div><div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  */</div><div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  bool</div><div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  is_open()</div><div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  { return _M_filebuf.is_open(); }</div><div class="line"><a name="l00835"></a><span class="lineno"> 835</span> </div><div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  // 365. Lack of const-qualification in clause 27</div><div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  bool</div><div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  is_open() const</div><div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  { return _M_filebuf.is_open(); }</div><div class="line"><a name="l00841"></a><span class="lineno"> 841</span> </div><div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  /**</div><div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  * @brief Opens an external file.</div><div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  * @param __s The name of the file.</div><div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  *</div><div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  * Calls @c std::basic_filebuf::open(__s,__mode|out). If that</div><div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  * function fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  */</div><div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  void</div><div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  open(const char* __s, ios_base::openmode __mode = ios_base::out)</div><div class="line"><a name="l00852"></a><span class="lineno"> 852</span>  {</div><div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  if (!_M_filebuf.open(__s, __mode | ios_base::out))</div><div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  this->setstate(ios_base::failbit);</div><div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  else</div><div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  // 409. Closing an fstream should clear error state</div><div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  this->clear();</div><div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  }</div><div class="line"><a name="l00860"></a><span class="lineno"> 860</span> </div><div class="line"><a name="l00861"></a><span class="lineno"> 861</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  /**</div><div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  * @brief Opens an external file.</div><div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  * @param __s The name of the file.</div><div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  *</div><div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  * Calls @c std::basic_filebuf::open(s,mode|out). If that</div><div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  * function fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  */</div><div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  void</div><div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  open(const std::string& __s, ios_base::openmode __mode = ios_base::out)</div><div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  {</div><div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  if (!_M_filebuf.open(__s, __mode | ios_base::out))</div><div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  this->setstate(ios_base::failbit);</div><div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  else</div><div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  // 409. Closing an fstream should clear error state</div><div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  this->clear();</div><div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  }</div><div class="line"><a name="l00880"></a><span class="lineno"> 880</span> </div><div class="line"><a name="l00881"></a><span class="lineno"> 881</span> #if __cplusplus >= 201703L</div><div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  /**</div><div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  * @brief Opens an external file.</div><div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  * @param __s The name of the file, as a filesystem::path.</div><div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  *</div><div class="line"><a name="l00887"></a><span class="lineno"> 887</span>  * Calls @c std::basic_filebuf::open(__s,__mode|out). If that</div><div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  * function fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l00889"></a><span class="lineno"> 889</span>  */</div><div class="line"><a name="l00890"></a><span class="lineno"> 890</span>  template<typename _Path></div><div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  _If_fs_path<_Path, void></div><div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  open(const _Path& __s, ios_base::openmode __mode = ios_base::out)</div><div class="line"><a name="l00893"></a><span class="lineno"> 893</span>  { open(__s.c_str(), __mode); }</div><div class="line"><a name="l00894"></a><span class="lineno"> 894</span> #endif // C++17</div><div class="line"><a name="l00895"></a><span class="lineno"> 895</span> #endif // C++11</div><div class="line"><a name="l00896"></a><span class="lineno"> 896</span> </div><div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  /**</div><div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  * @brief Close the file.</div><div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  *</div><div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  * Calls @c std::basic_filebuf::close(). If that function</div><div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  * fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  */</div><div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  void</div><div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  close()</div><div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  {</div><div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  if (!_M_filebuf.close())</div><div class="line"><a name="l00907"></a><span class="lineno"> 907</span>  this->setstate(ios_base::failbit);</div><div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  }</div><div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  };</div><div class="line"><a name="l00910"></a><span class="lineno"> 910</span> </div><div class="line"><a name="l00911"></a><span class="lineno"> 911</span> </div><div class="line"><a name="l00912"></a><span class="lineno"> 912</span>  // [27.8.1.11] Template class basic_fstream</div><div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  /**</div><div class="line"><a name="l00914"></a><span class="lineno"> 914</span>  * @brief Controlling input and output for files.</div><div class="line"><a name="l00915"></a><span class="lineno"> 915</span>  * @ingroup io</div><div class="line"><a name="l00916"></a><span class="lineno"> 916</span>  *</div><div class="line"><a name="l00917"></a><span class="lineno"> 917</span>  * @tparam _CharT Type of character stream.</div><div class="line"><a name="l00918"></a><span class="lineno"> 918</span>  * @tparam _Traits Traits for character type, defaults to</div><div class="line"><a name="l00919"></a><span class="lineno"> 919</span>  * char_traits<_CharT>.</div><div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  *</div><div class="line"><a name="l00921"></a><span class="lineno"> 921</span>  * This class supports reading from and writing to named files, using</div><div class="line"><a name="l00922"></a><span class="lineno"> 922</span>  * the inherited functions from std::basic_iostream. To control the</div><div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  * associated sequence, an instance of std::basic_filebuf is used, which</div><div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  * this page refers to as @c sb.</div><div class="line"><a name="l00925"></a><span class="lineno"> 925</span>  */</div><div class="line"><a name="l00926"></a><span class="lineno"> 926</span>  template<typename _CharT, typename _Traits></div><div class="line"><a name="l00927"></a><span class="lineno"> 927</span>  class basic_fstream : public basic_iostream<_CharT, _Traits></div><div class="line"><a name="l00928"></a><span class="lineno"> 928</span>  {</div><div class="line"><a name="l00929"></a><span class="lineno"> 929</span>  public:</div><div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  // Types:</div><div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  typedef _CharT char_type;</div><div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  typedef _Traits traits_type;</div><div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  typedef typename traits_type::int_type int_type;</div><div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  typedef typename traits_type::pos_type pos_type;</div><div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  typedef typename traits_type::off_type off_type;</div><div class="line"><a name="l00936"></a><span class="lineno"> 936</span> </div><div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  // Non-standard types:</div><div class="line"><a name="l00938"></a><span class="lineno"> 938</span>  typedef basic_filebuf<char_type, traits_type> __filebuf_type;</div><div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  typedef basic_ios<char_type, traits_type> __ios_type;</div><div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  typedef basic_iostream<char_type, traits_type> __iostream_type;</div><div class="line"><a name="l00941"></a><span class="lineno"> 941</span> </div><div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  private:</div><div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  __filebuf_type _M_filebuf;</div><div class="line"><a name="l00944"></a><span class="lineno"> 944</span> </div><div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  public:</div><div class="line"><a name="l00946"></a><span class="lineno"> 946</span>  // Constructors/destructor:</div><div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  /**</div><div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  * @brief Default constructor.</div><div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  *</div><div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  * Initializes @c sb using its default constructor, and passes</div><div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  * @c &sb to the base class initializer. Does not open any files</div><div class="line"><a name="l00952"></a><span class="lineno"> 952</span>  * (you haven't given it a filename to open).</div><div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  */</div><div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  basic_fstream()</div><div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  : __iostream_type(), _M_filebuf()</div><div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  { this->init(&_M_filebuf); }</div><div class="line"><a name="l00957"></a><span class="lineno"> 957</span> </div><div class="line"><a name="l00958"></a><span class="lineno"> 958</span>  /**</div><div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  * @brief Create an input/output file stream.</div><div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  * @param __s Null terminated string specifying the filename.</div><div class="line"><a name="l00961"></a><span class="lineno"> 961</span>  * @param __mode Open file in specified mode (see std::ios_base).</div><div class="line"><a name="l00962"></a><span class="lineno"> 962</span>  */</div><div class="line"><a name="l00963"></a><span class="lineno"> 963</span>  explicit</div><div class="line"><a name="l00964"></a><span class="lineno"> 964</span>  basic_fstream(const char* __s,</div><div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  ios_base::openmode __mode = ios_base::in | ios_base::out)</div><div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  : __iostream_type(0), _M_filebuf()</div><div class="line"><a name="l00967"></a><span class="lineno"> 967</span>  {</div><div class="line"><a name="l00968"></a><span class="lineno"> 968</span>  this->init(&_M_filebuf);</div><div class="line"><a name="l00969"></a><span class="lineno"> 969</span>  this->open(__s, __mode);</div><div class="line"><a name="l00970"></a><span class="lineno"> 970</span>  }</div><div class="line"><a name="l00971"></a><span class="lineno"> 971</span> </div><div class="line"><a name="l00972"></a><span class="lineno"> 972</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00973"></a><span class="lineno"> 973</span>  /**</div><div class="line"><a name="l00974"></a><span class="lineno"> 974</span>  * @brief Create an input/output file stream.</div><div class="line"><a name="l00975"></a><span class="lineno"> 975</span>  * @param __s Null terminated string specifying the filename.</div><div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  * @param __mode Open file in specified mode (see std::ios_base).</div><div class="line"><a name="l00977"></a><span class="lineno"> 977</span>  */</div><div class="line"><a name="l00978"></a><span class="lineno"> 978</span>  explicit</div><div class="line"><a name="l00979"></a><span class="lineno"> 979</span>  basic_fstream(const std::string& __s,</div><div class="line"><a name="l00980"></a><span class="lineno"> 980</span>  ios_base::openmode __mode = ios_base::in | ios_base::out)</div><div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  : __iostream_type(0), _M_filebuf()</div><div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  {</div><div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  this->init(&_M_filebuf);</div><div class="line"><a name="l00984"></a><span class="lineno"> 984</span>  this->open(__s, __mode);</div><div class="line"><a name="l00985"></a><span class="lineno"> 985</span>  }</div><div class="line"><a name="l00986"></a><span class="lineno"> 986</span> </div><div class="line"><a name="l00987"></a><span class="lineno"> 987</span> #if __cplusplus >= 201703L</div><div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  /**</div><div class="line"><a name="l00989"></a><span class="lineno"> 989</span>  * @param Create an input/output file stream.</div><div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  * @param __s filesystem::path specifying the filename.</div><div class="line"><a name="l00991"></a><span class="lineno"> 991</span>  * @param __mode Open file in specified mode (see std::ios_base).</div><div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  */</div><div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  template<typename _Path, typename _Require = _If_fs_path<_Path>></div><div class="line"><a name="l00994"></a><span class="lineno"> 994</span>  basic_fstream(const _Path& __s,</div><div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  ios_base::openmode __mode = ios_base::in | ios_base::out)</div><div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  : basic_fstream(__s.c_str(), __mode)</div><div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  { }</div><div class="line"><a name="l00998"></a><span class="lineno"> 998</span> #endif // C++17</div><div class="line"><a name="l00999"></a><span class="lineno"> 999</span> </div><div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>  basic_fstream(const basic_fstream&) = delete;</div><div class="line"><a name="l01001"></a><span class="lineno"> 1001</span> </div><div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>  basic_fstream(basic_fstream&& __rhs)</div><div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>  : __iostream_type(std::move(__rhs)),</div><div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>  _M_filebuf(std::move(__rhs._M_filebuf))</div><div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  { __iostream_type::set_rdbuf(&_M_filebuf); }</div><div class="line"><a name="l01006"></a><span class="lineno"> 1006</span> #endif</div><div class="line"><a name="l01007"></a><span class="lineno"> 1007</span> </div><div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>  /**</div><div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  * @brief The destructor does nothing.</div><div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>  *</div><div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>  * The file is closed by the filebuf object, not the formatting</div><div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>  * stream.</div><div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>  */</div><div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>  ~basic_fstream()</div><div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>  { }</div><div class="line"><a name="l01016"></a><span class="lineno"> 1016</span> </div><div class="line"><a name="l01017"></a><span class="lineno"> 1017</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>  // 27.8.3.2 Assign and swap:</div><div class="line"><a name="l01019"></a><span class="lineno"> 1019</span> </div><div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>  basic_fstream&</div><div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  operator=(const basic_fstream&) = delete;</div><div class="line"><a name="l01022"></a><span class="lineno"> 1022</span> </div><div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>  basic_fstream&</div><div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>  operator=(basic_fstream&& __rhs)</div><div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  {</div><div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>  __iostream_type::operator=(std::move(__rhs));</div><div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  _M_filebuf = std::move(__rhs._M_filebuf);</div><div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>  return *this;</div><div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>  }</div><div class="line"><a name="l01030"></a><span class="lineno"> 1030</span> </div><div class="line"><a name="l01031"></a><span class="lineno"> 1031</span>  void</div><div class="line"><a name="l01032"></a><span class="lineno"> 1032</span>  swap(basic_fstream& __rhs)</div><div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>  {</div><div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>  __iostream_type::swap(__rhs);</div><div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>  _M_filebuf.swap(__rhs._M_filebuf);</div><div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>  }</div><div class="line"><a name="l01037"></a><span class="lineno"> 1037</span> #endif</div><div class="line"><a name="l01038"></a><span class="lineno"> 1038</span> </div><div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  // Members:</div><div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>  /**</div><div class="line"><a name="l01041"></a><span class="lineno"> 1041</span>  * @brief Accessing the underlying buffer.</div><div class="line"><a name="l01042"></a><span class="lineno"> 1042</span>  * @return The current basic_filebuf buffer.</div><div class="line"><a name="l01043"></a><span class="lineno"> 1043</span>  *</div><div class="line"><a name="l01044"></a><span class="lineno"> 1044</span>  * This hides both signatures of std::basic_ios::rdbuf().</div><div class="line"><a name="l01045"></a><span class="lineno"> 1045</span>  */</div><div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>  __filebuf_type*</div><div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>  rdbuf() const</div><div class="line"><a name="l01048"></a><span class="lineno"> 1048</span>  { return const_cast<__filebuf_type*>(&_M_filebuf); }</div><div class="line"><a name="l01049"></a><span class="lineno"> 1049</span> </div><div class="line"><a name="l01050"></a><span class="lineno"> 1050</span>  /**</div><div class="line"><a name="l01051"></a><span class="lineno"> 1051</span>  * @brief Wrapper to test for an open file.</div><div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>  * @return @c rdbuf()->is_open()</div><div class="line"><a name="l01053"></a><span class="lineno"> 1053</span>  */</div><div class="line"><a name="l01054"></a><span class="lineno"> 1054</span>  bool</div><div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>  is_open()</div><div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>  { return _M_filebuf.is_open(); }</div><div class="line"><a name="l01057"></a><span class="lineno"> 1057</span> </div><div class="line"><a name="l01058"></a><span class="lineno"> 1058</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l01059"></a><span class="lineno"> 1059</span>  // 365. Lack of const-qualification in clause 27</div><div class="line"><a name="l01060"></a><span class="lineno"> 1060</span>  bool</div><div class="line"><a name="l01061"></a><span class="lineno"> 1061</span>  is_open() const</div><div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>  { return _M_filebuf.is_open(); }</div><div class="line"><a name="l01063"></a><span class="lineno"> 1063</span> </div><div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>  /**</div><div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  * @brief Opens an external file.</div><div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>  * @param __s The name of the file.</div><div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>  *</div><div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>  * Calls @c std::basic_filebuf::open(__s,__mode). If that</div><div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>  * function fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  */</div><div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>  void</div><div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  open(const char* __s,</div><div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  ios_base::openmode __mode = ios_base::in | ios_base::out)</div><div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>  {</div><div class="line"><a name="l01076"></a><span class="lineno"> 1076</span>  if (!_M_filebuf.open(__s, __mode))</div><div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  this->setstate(ios_base::failbit);</div><div class="line"><a name="l01078"></a><span class="lineno"> 1078</span>  else</div><div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>  // 409. Closing an fstream should clear error state</div><div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>  this->clear();</div><div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  }</div><div class="line"><a name="l01083"></a><span class="lineno"> 1083</span> </div><div class="line"><a name="l01084"></a><span class="lineno"> 1084</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>  /**</div><div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>  * @brief Opens an external file.</div><div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>  * @param __s The name of the file.</div><div class="line"><a name="l01088"></a><span class="lineno"> 1088</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l01089"></a><span class="lineno"> 1089</span>  *</div><div class="line"><a name="l01090"></a><span class="lineno"> 1090</span>  * Calls @c std::basic_filebuf::open(__s,__mode). If that</div><div class="line"><a name="l01091"></a><span class="lineno"> 1091</span>  * function fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l01092"></a><span class="lineno"> 1092</span>  */</div><div class="line"><a name="l01093"></a><span class="lineno"> 1093</span>  void</div><div class="line"><a name="l01094"></a><span class="lineno"> 1094</span>  open(const std::string& __s,</div><div class="line"><a name="l01095"></a><span class="lineno"> 1095</span>  ios_base::openmode __mode = ios_base::in | ios_base::out)</div><div class="line"><a name="l01096"></a><span class="lineno"> 1096</span>  {</div><div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>  if (!_M_filebuf.open(__s, __mode))</div><div class="line"><a name="l01098"></a><span class="lineno"> 1098</span>  this->setstate(ios_base::failbit);</div><div class="line"><a name="l01099"></a><span class="lineno"> 1099</span>  else</div><div class="line"><a name="l01100"></a><span class="lineno"> 1100</span>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l01101"></a><span class="lineno"> 1101</span>  // 409. Closing an fstream should clear error state</div><div class="line"><a name="l01102"></a><span class="lineno"> 1102</span>  this->clear();</div><div class="line"><a name="l01103"></a><span class="lineno"> 1103</span>  }</div><div class="line"><a name="l01104"></a><span class="lineno"> 1104</span> </div><div class="line"><a name="l01105"></a><span class="lineno"> 1105</span> #if __cplusplus >= 201703L</div><div class="line"><a name="l01106"></a><span class="lineno"> 1106</span>  /**</div><div class="line"><a name="l01107"></a><span class="lineno"> 1107</span>  * @brief Opens an external file.</div><div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>  * @param __s The name of the file, as a filesystem::path.</div><div class="line"><a name="l01109"></a><span class="lineno"> 1109</span>  * @param __mode The open mode flags.</div><div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>  *</div><div class="line"><a name="l01111"></a><span class="lineno"> 1111</span>  * Calls @c std::basic_filebuf::open(__s,__mode). If that</div><div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>  * function fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>  */</div><div class="line"><a name="l01114"></a><span class="lineno"> 1114</span>  template<typename _Path></div><div class="line"><a name="l01115"></a><span class="lineno"> 1115</span>  _If_fs_path<_Path, void></div><div class="line"><a name="l01116"></a><span class="lineno"> 1116</span>  open(const _Path& __s,</div><div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>  ios_base::openmode __mode = ios_base::in | ios_base::out)</div><div class="line"><a name="l01118"></a><span class="lineno"> 1118</span>  { open(__s.c_str(), __mode); }</div><div class="line"><a name="l01119"></a><span class="lineno"> 1119</span> #endif // C++17</div><div class="line"><a name="l01120"></a><span class="lineno"> 1120</span> #endif // C++11</div><div class="line"><a name="l01121"></a><span class="lineno"> 1121</span> </div><div class="line"><a name="l01122"></a><span class="lineno"> 1122</span>  /**</div><div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>  * @brief Close the file.</div><div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>  *</div><div class="line"><a name="l01125"></a><span class="lineno"> 1125</span>  * Calls @c std::basic_filebuf::close(). If that function</div><div class="line"><a name="l01126"></a><span class="lineno"> 1126</span>  * fails, @c failbit is set in the stream's error state.</div><div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>  */</div><div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>  void</div><div class="line"><a name="l01129"></a><span class="lineno"> 1129</span>  close()</div><div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>  {</div><div class="line"><a name="l01131"></a><span class="lineno"> 1131</span>  if (!_M_filebuf.close())</div><div class="line"><a name="l01132"></a><span class="lineno"> 1132</span>  this->setstate(ios_base::failbit);</div><div class="line"><a name="l01133"></a><span class="lineno"> 1133</span>  }</div><div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>  };</div><div class="line"><a name="l01135"></a><span class="lineno"> 1135</span> </div><div class="line"><a name="l01136"></a><span class="lineno"> 1136</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l01137"></a><span class="lineno"> 1137</span>  /// Swap specialization for filebufs.</div><div class="line"><a name="l01138"></a><span class="lineno"> 1138</span>  template <class _CharT, class _Traits></div><div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>  inline void</div><div class="line"><a name="l01140"></a><span class="lineno"> 1140</span>  swap(basic_filebuf<_CharT, _Traits>& __x,</div><div class="line"><a name="l01141"></a><span class="lineno"> 1141</span>  basic_filebuf<_CharT, _Traits>& __y)</div><div class="line"><a name="l01142"></a><span class="lineno"> 1142</span>  { __x.swap(__y); }</div><div class="line"><a name="l01143"></a><span class="lineno"> 1143</span> </div><div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>  /// Swap specialization for ifstreams.</div><div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>  template <class _CharT, class _Traits></div><div class="line"><a name="l01146"></a><span class="lineno"> 1146</span>  inline void</div><div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>  swap(basic_ifstream<_CharT, _Traits>& __x,</div><div class="line"><a name="l01148"></a><span class="lineno"> 1148</span>  basic_ifstream<_CharT, _Traits>& __y)</div><div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>  { __x.swap(__y); }</div><div class="line"><a name="l01150"></a><span class="lineno"> 1150</span> </div><div class="line"><a name="l01151"></a><span class="lineno"> 1151</span>  /// Swap specialization for ofstreams.</div><div class="line"><a name="l01152"></a><span class="lineno"> 1152</span>  template <class _CharT, class _Traits></div><div class="line"><a name="l01153"></a><span class="lineno"> 1153</span>  inline void</div><div class="line"><a name="l01154"></a><span class="lineno"> 1154</span>  swap(basic_ofstream<_CharT, _Traits>& __x,</div><div class="line"><a name="l01155"></a><span class="lineno"> 1155</span>  basic_ofstream<_CharT, _Traits>& __y)</div><div class="line"><a name="l01156"></a><span class="lineno"> 1156</span>  { __x.swap(__y); }</div><div class="line"><a name="l01157"></a><span class="lineno"> 1157</span> </div><div class="line"><a name="l01158"></a><span class="lineno"> 1158</span>  /// Swap specialization for fstreams.</div><div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>  template <class _CharT, class _Traits></div><div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>  inline void</div><div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>  swap(basic_fstream<_CharT, _Traits>& __x,</div><div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>  basic_fstream<_CharT, _Traits>& __y)</div><div class="line"><a name="l01163"></a><span class="lineno"> 1163</span>  { __x.swap(__y); }</div><div class="line"><a name="l01164"></a><span class="lineno"> 1164</span> #endif</div><div class="line"><a name="l01165"></a><span class="lineno"> 1165</span> </div><div class="line"><a name="l01166"></a><span class="lineno"> 1166</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l01167"></a><span class="lineno"> 1167</span> } // namespace</div><div class="line"><a name="l01168"></a><span class="lineno"> 1168</span> </div><div class="line"><a name="l01169"></a><span class="lineno"> 1169</span> #include <bits/fstream.tcc></div><div class="line"><a name="l01170"></a><span class="lineno"> 1170</span> </div><div class="line"><a name="l01171"></a><span class="lineno"> 1171</span> #endif /* _GLIBCXX_FSTREAM */</div></div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<!-- start footer part -->
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
<ul>
<li class="navelem"><a class="el" href="dir_47f59b4ef76325ed55a7fd4bed4be05b.html">include</a></li><li class="navelem"><a class="el" href="a00068.html">fstream</a></li>
<li class="footer">Generated by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.15 </li>
</ul>
</div>
</body>
</html>
distrib
>
Mageia
>
7
>
armv7hl
>
media
>
core-updates
>
by-pkgid
>
bfb47da7e0322bcb0e23e4b1838d9db9
>
files
>
67
