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  26 <div class="titlepage"><div><div><h3 class="title">
  27 <a name="boost_asio.reference.ConvertibleToMutableBuffer"></a><a class="link" href="ConvertibleToMutableBuffer.html" title="Convertible to mutable buffer requirements">Convertible
  28       to mutable buffer requirements</a>
  29 </h3></div></div></div>
  30 <p>
  31         A type that meets the requirements for convertibility to a mutable buffer
  32         must meet the requirements of <code class="computeroutput"><span class="identifier">CopyConstructible</span></code>
  33         types (C++ Std, 20.1.3), and the requirements of <code class="computeroutput"><span class="identifier">Assignable</span></code>
  34         types (C++ Std, 23.1).
  35       </p>
  36 <p>
  37         In the table below, <code class="computeroutput"><span class="identifier">X</span></code> denotes
  38         a class meeting the requirements for convertibility to a mutable buffer,
  39         <code class="computeroutput"><span class="identifier">a</span></code> and <code class="computeroutput"><span class="identifier">b</span></code>
  40         denote values of type <code class="computeroutput"><span class="identifier">X</span></code>,
  41         and <code class="computeroutput"><span class="identifier">u</span></code>, <code class="computeroutput"><span class="identifier">v</span></code>
  42         and <code class="computeroutput"><span class="identifier">w</span></code> denote identifiers.
  43       </p>
  44 <div class="table">
  45 <a name="boost_asio.reference.ConvertibleToMutableBuffer.t0"></a><p class="title"><b>Table&#160;7.&#160;ConvertibleToMutableBuffer requirements</b></p>
  46 <div class="table-contents"><table class="table" summary="ConvertibleToMutableBuffer requirements">
  47 <colgroup>
  48 <col>
  49 <col>
  50 </colgroup>
  51 <thead><tr>
  52 <th>
  53                 <p>
  54                   expression
  55                 </p>
  56               </th>
  57 <th>
  58                 <p>
  59                   postcondition
  60                 </p>
  61               </th>
  62 </tr></thead>
  63 <tbody>
  64 <tr>
  65 <td>
  66                 <p>
  67 </p>
  68 <pre class="programlisting"><span class="identifier">mutable_buffer</span> <span class="identifier">u</span><span class="special">(</span><span class="identifier">a</span><span class="special">);</span>
  69 <span class="identifier">mutable_buffer</span> <span class="identifier">v</span><span class="special">(</span><span class="identifier">a</span><span class="special">);</span>
  70 </pre>
  71 <p>
  72                 </p>
  73               </td>
  74 <td>
  75                 <p>
  76 </p>
  77 <pre class="programlisting"><span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">v</span><span class="special">)</span>
  78   <span class="special">&amp;&amp;</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">v</span><span class="special">)</span>
  79 </pre>
  80 <p>
  81                 </p>
  82               </td>
  83 </tr>
  84 <tr>
  85 <td>
  86                 <p>
  87 </p>
  88 <pre class="programlisting"><span class="identifier">mutable_buffer</span> <span class="identifier">u</span><span class="special">(</span><span class="identifier">a</span><span class="special">);</span>
  89 <span class="identifier">mutable_buffer</span> <span class="identifier">v</span> <span class="special">=</span> <span class="identifier">a</span><span class="special">;</span>
  90 </pre>
  91 <p>
  92                 </p>
  93               </td>
  94 <td>
  95                 <p>
  96 </p>
  97 <pre class="programlisting"><span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">v</span><span class="special">)</span>
  98   <span class="special">&amp;&amp;</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">v</span><span class="special">)</span>
  99 </pre>
 100 <p>
 101                 </p>
 102               </td>
 103 </tr>
 104 <tr>
 105 <td>
 106                 <p>
 107 </p>
 108 <pre class="programlisting"><span class="identifier">mutable_buffer</span> <span class="identifier">u</span><span class="special">(</span><span class="identifier">a</span><span class="special">);</span>
 109 <span class="identifier">mutable_buffer</span> <span class="identifier">v</span><span class="special">;</span> <span class="identifier">v</span> <span class="special">=</span> <span class="identifier">a</span><span class="special">;</span>
 110 </pre>
 111 <p>
 112                 </p>
 113               </td>
 114 <td>
 115                 <p>
 116 </p>
 117 <pre class="programlisting"><span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">v</span><span class="special">)</span>
 118   <span class="special">&amp;&amp;</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">v</span><span class="special">)</span>
 119 </pre>
 120 <p>
 121                 </p>
 122               </td>
 123 </tr>
 124 <tr>
 125 <td>
 126                 <p>
 127 </p>
 128 <pre class="programlisting"><span class="identifier">mutable_buffer</span> <span class="identifier">u</span><span class="special">(</span><span class="identifier">a</span><span class="special">);</span>
 129 <span class="keyword">const</span> <span class="identifier">X</span><span class="special">&amp;</span> <span class="identifier">v</span> <span class="special">=</span> <span class="identifier">a</span><span class="special">;</span>
 130 <span class="identifier">mutable_buffer</span> <span class="identifier">w</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>
 131 </pre>
 132 <p>
 133                 </p>
 134               </td>
 135 <td>
 136                 <p>
 137 </p>
 138 <pre class="programlisting"><span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">w</span><span class="special">)</span>
 139   <span class="special">&amp;&amp;</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">w</span><span class="special">)</span>
 140 </pre>
 141 <p>
 142                 </p>
 143               </td>
 144 </tr>
 145 <tr>
 146 <td>
 147                 <p>
 148 </p>
 149 <pre class="programlisting"><span class="identifier">mutable_buffer</span> <span class="identifier">u</span><span class="special">(</span><span class="identifier">a</span><span class="special">);</span>
 150 <span class="identifier">X</span> <span class="identifier">v</span><span class="special">(</span><span class="identifier">a</span><span class="special">);</span>
 151 <span class="identifier">mutable_buffer</span> <span class="identifier">w</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>
 152 </pre>
 153 <p>
 154                 </p>
 155               </td>
 156 <td>
 157                 <p>
 158 </p>
 159 <pre class="programlisting"><span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">w</span><span class="special">)</span>
 160   <span class="special">&amp;&amp;</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">w</span><span class="special">)</span>
 161 </pre>
 162 <p>
 163                 </p>
 164               </td>
 165 </tr>
 166 <tr>
 167 <td>
 168                 <p>
 169 </p>
 170 <pre class="programlisting"><span class="identifier">mutable_buffer</span> <span class="identifier">u</span><span class="special">(</span><span class="identifier">a</span><span class="special">);</span>
 171 <span class="identifier">X</span> <span class="identifier">v</span> <span class="special">=</span> <span class="identifier">a</span><span class="special">;</span>
 172 <span class="identifier">mutable_buffer</span> <span class="identifier">w</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>
 173 </pre>
 174 <p>
 175                 </p>
 176               </td>
 177 <td>
 178                 <p>
 179 </p>
 180 <pre class="programlisting"><span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">w</span><span class="special">)</span>
 181   <span class="special">&amp;&amp;</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">w</span><span class="special">)</span>
 182 </pre>
 183 <p>
 184                 </p>
 185               </td>
 186 </tr>
 187 <tr>
 188 <td>
 189                 <p>
 190 </p>
 191 <pre class="programlisting"><span class="identifier">mutable_buffer</span> <span class="identifier">u</span><span class="special">(</span><span class="identifier">a</span><span class="special">);</span>
 192 <span class="identifier">X</span> <span class="identifier">v</span><span class="special">(</span><span class="identifier">b</span><span class="special">);</span> <span class="identifier">v</span> <span class="special">=</span> <span class="identifier">a</span><span class="special">;</span>
 193 <span class="identifier">mutable_buffer</span> <span class="identifier">w</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>
 194 </pre>
 195 <p>
 196                 </p>
 197               </td>
 198 <td>
 199                 <p>
 200 </p>
 201 <pre class="programlisting"><span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_cast</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;(</span><span class="identifier">w</span><span class="special">)</span>
 202   <span class="special">&amp;&amp;</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">u</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">w</span><span class="special">)</span>
 203 </pre>
 204 <p>
 205                 </p>
 206               </td>
 207 </tr>
 208 </tbody>
 209 </table></div>
 210 </div>
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 217         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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