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| <div class="section" id="tag-dispatching-protocol"> |
| <h1><a class="toc-backref" href="./changes-in-boost-1-32-0.html#id66" name="tag-dispatching-protocol">Tag Dispatching Protocol</a></h1> |
| <p>The mechanism used to select algorithm implementations based on |
| sequence family has been changed to use metafunction classes:</p> |
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| <tr><th>Before</th> |
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| <tr><td><em>name</em><tt class="literal"><span class="pre">_traits<Tag>::algorithm<...>::type</span></tt></td> |
| <td><em>name</em><tt class="literal"><span class="pre">_impl<Tag>::apply<...>::type</span></tt></td> |
| </tr> |
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| <p>If your code implemented a custom sequence, it needs to be adjusted |
| according to the above table; for example:</p> |
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| template<> struct begin_traits<my_tag> |
| { |
| template< typename S > struct algorithm |
| { |
| typedef ... type; |
| }; |
| }; |
| </pre> |
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| <td><pre class="first last literal-block"> |
| template<> struct begin_<strong>impl</strong><my_tag> |
| { |
| template< typename S > struct <strong>apply</strong> |
| { |
| typedef ... type; |
| }; |
| }; |
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