projects / ceph.git / blame
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| 7c673cae FG |
1 | <?xml version="1.0" encoding="utf-8" ?> |
| 2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | |
| 3 | <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> | |
| 4 | <!-- Copyright Aleksey Gurtovoy 2006. Distributed under the Boost --> | |
| 5 | <!-- Software License, Version 1.0. (See accompanying --> | |
| 6 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
| 7 | <head> | |
| 8 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> | |
| 9 | <meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" /> | |
| 10 | <title>THE BOOST MPL LIBRARY: Tag Dispatching Protocol</title> | |
| 11 | <link rel="stylesheet" href="../style.css" type="text/css" /> | |
| 12 | </head> | |
| 13 | <body class="docframe"> | |
| 14 | <table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./iterator-protocol.html" class="navigation-link">Prev</a> <a href="./numeric-metafunction.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./iterator-protocol.html" class="navigation-link">Back</a> <a href="./numeric-metafunction.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./changes-in-boost-1-32-0.html" class="navigation-link">Up</a> <a href="../index.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./tutorial_toc.html" class="navigation-link">Full TOC</a></span></td> | |
| 15 | <td class="header-group page-location"><a href="../index.html" class="navigation-link">Front Page</a> / <a href="./changelog-history.html" class="navigation-link">Changelog & History</a> / <a href="./changes-in-boost-1-32-0.html" class="navigation-link">Changes in Boost 1.32.0 Release</a> / <a href="./tag-dispatching-protocol.html" class="navigation-link">Tag Dispatching Protocol</a></td> | |
| 16 | </tr></table><div class="header-separator"></div> | |
| 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"> | |
| 22 | <colgroup> | |
| 23 | <col width="53%" /> | |
| 24 | <col width="47%" /> | |
| 25 | </colgroup> | |
| 26 | <thead valign="bottom"> | |
| 27 | <tr><th>Before</th> | |
| 28 | <th>Now</th> | |
| 29 | </tr> | |
| 30 | </thead> | |
| 31 | <tbody valign="top"> | |
| 32 | <tr><td><em>name</em><tt class="literal"><span class="pre">_traits<Tag>::algorithm<...>::type</span></tt></td> | |
| 33 | <td><em>name</em><tt class="literal"><span class="pre">_impl<Tag>::apply<...>::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> | |
| 39 | <table border="1" class="table"> | |
| 40 | <colgroup> | |
| 41 | <col width="50%" /> | |
| 42 | <col width="50%" /> | |
| 43 | </colgroup> | |
| 44 | <thead valign="bottom"> | |
| 45 | <tr><th>Before</th> | |
| 46 | <th>Now</th> | |
| 47 | </tr> | |
| 48 | </thead> | |
| 49 | <tbody valign="top"> | |
| 50 | <tr><td><pre class="first last literal-block"> | |
| 51 | template<> struct begin_traits<my_tag> | |
| 52 | { | |
| 53 | template< typename S > struct algorithm | |
| 54 | { | |
| 55 | typedef ... type; | |
| 56 | }; | |
| 57 | }; | |
| 58 | </pre> | |
| 59 | </td> | |
| 60 | <td><pre class="first last literal-block"> | |
| 61 | template<> struct begin_<strong>impl</strong><my_tag> | |
| 62 | { | |
| 63 | template< typename S > struct <strong>apply</strong> | |
| 64 | { | |
| 65 | typedef ... type; | |
| 66 | }; | |
| 67 | }; | |
| 68 | </pre> | |
| 69 | </td> | |
| 70 | </tr> | |
| 71 | </tbody> | |
| 72 | </table> | |
| 73 | </div> | |
| 74 | ||
| 75 | <div class="footer-separator"></div> | |
| 76 | <table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./iterator-protocol.html" class="navigation-link">Prev</a> <a href="./numeric-metafunction.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./iterator-protocol.html" class="navigation-link">Back</a> <a href="./numeric-metafunction.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./changes-in-boost-1-32-0.html" class="navigation-link">Up</a> <a href="../index.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./tutorial_toc.html" class="navigation-link">Full TOC</a></span></td> | |
| 77 | </tr></table></body> | |
| 78 | </html> |