ceph/src/boost/libs/mpl/doc/tutorial/tag-dispatching-protocol.html

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  10 <title>THE BOOST MPL LIBRARY: Tag Dispatching Protocol</title>
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  17 <div class="section" id="tag-dispatching-protocol">
  18 <h1><a class="toc-backref" href="./changes-in-boost-1-32-0.html#id66" name="tag-dispatching-protocol">Tag Dispatching Protocol</a></h1>
  19 <p>The mechanism used to select algorithm implementations based on
  20 sequence family has been changed to use metafunction classes:</p>
  21 <table border="1" class="table">
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  32 <tr><td><em>name</em><tt class="literal"><span class="pre">_traits&lt;Tag&gt;::algorithm&lt;...&gt;::type</span></tt></td>
  33 <td><em>name</em><tt class="literal"><span class="pre">_impl&lt;Tag&gt;::apply&lt;...&gt;::type</span></tt></td>
  34 </tr>
  35 </tbody>
  36 </table>
  37 <p>If your code implemented a custom sequence, it needs to be adjusted
  38 according to the above table; for example:</p>
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  50 <tr><td><pre class="first last literal-block">
  51 template&lt;&gt; struct begin_traits&lt;my_tag&gt;
  52 {
  53     template&lt; typename S &gt; struct algorithm
  54     {
  55         typedef ... type;
  56     };
  57 };
  58 </pre>
  59 </td>
  60 <td><pre class="first last literal-block">
  61 template&lt;&gt; struct begin_<strong>impl</strong>&lt;my_tag&gt;
  62 {
  63     template&lt; typename S &gt; struct <strong>apply</strong>
  64     {
  65         typedef ... type;
  66     };
  67 };
  68 </pre>
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