projects / ceph.git / blame
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| 3 | <html> | |
| 4 | <head> | |
| 5 | <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> | |
| 6 | <title>Boost.Flyweight Documentation - Tags reference</title> | |
| 7 | <link rel="stylesheet" href="../style.css" type="text/css"> | |
| 8 | <link rel="start" href="../index.html"> | |
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| 12 | </head> | |
| 13 | ||
| 14 | <body> | |
| 15 | <h1><img src="../../../../boost.png" alt="Boost logo" align= | |
| 16 | "middle" width="277" height="86">Boost.Flyweight | |
| 17 | Tags reference</h1> | |
| 18 | ||
| 19 | <div class="prev_link"><a href="key_value.html"><img src="../prev.gif" alt="key-value flyweights" border="0"><br> | |
| 20 | Key-value flyweights | |
| 21 | </a></div> | |
| 22 | <div class="up_link"><a href="index.html"><img src="../up.gif" alt="Boost.Flyweight reference" border="0"><br> | |
| 23 | Boost.Flyweight reference | |
| 24 | </a></div> | |
| 25 | <div class="next_link"><a href="factories.html"><img src="../next.gif" alt="factories" border="0"><br> | |
| 26 | Factories | |
| 27 | </a></div><br clear="all" style="clear: all;"> | |
| 28 | ||
| 29 | <hr> | |
| 30 | ||
| 31 | <h2>Contents</h2> | |
| 32 | ||
| 33 | <ul> | |
| 34 | <li><a href="#tag">Tags</a></li> | |
| 35 | <li><a href="#tag_synopsis">Header | |
| 36 | <code>"boost/flyweight/tag.hpp"</code> synopsis</a> | |
| 37 | <ul> | |
| 38 | <li><a href="#tag_construct">Class template <code>tag</code></a></li> | |
| 39 | </ul> | |
| 40 | </li> | |
| 41 | </ul> | |
| 42 | ||
| 43 | <h2><a name="tag">Tags</a></h2> | |
| 44 | ||
| 45 | <p> | |
| 46 | A <i>tag</i> is a type of the form | |
| 47 | <a href="#tag_construct"><code>tag<T></code></a> for some arbitrary | |
| 48 | <code>T</code>. | |
| 49 | In the context of Boost.Flyweight, tags are syntactic artifacts used | |
| 50 | to differentiate instantiations of the class template | |
| 51 | <a href="flyweight.html#flyweight"><code>flyweight</code></a> which would | |
| 52 | otherwise be identical. Tagging a <code>flyweight</code> instantiation with | |
| 53 | a tag type local to a given context ensures that the global resources | |
| 54 | of that instantiation (for instance, the associated | |
| 55 | <a href="factories.html#factory">factory class</a>) will not be unintentionally | |
| 56 | shared by other areas of the program. | |
| 57 | </p> | |
| 58 | ||
| 59 | <h2><a name="tag_synopsis">Header | |
| 60 | <a href="../../../../boost/flyweight/tag.hpp"><code>"boost/flyweight/tag.hpp"</code></a> synopsis</a></h2> | |
| 61 | ||
| 62 | <blockquote><pre> | |
| 63 | <span class=keyword>namespace</span> <span class=identifier>boost</span><span class=special>{</span> | |
| 64 | ||
| 65 | <span class=keyword>namespace</span> <span class=identifier>flyweights</span><span class=special>{</span> | |
| 66 | ||
| 67 | <span class=keyword>template</span><span class=special><</span><span class=keyword>typename</span> <span class=identifier>T</span><span class=special>></span> | |
| 68 | <span class=keyword>struct</span> <span class=identifier>tag</span><span class=special>;</span> | |
| 69 | ||
| 70 | <span class=special>}</span> <span class=comment>// namespace boost::flyweights</span> | |
| 71 | ||
| 72 | <span class=special>}</span> <span class=comment>// namespace boost</span> | |
| 73 | </pre></blockquote> | |
| 74 | ||
| 75 | <h3><a name="tag_construct">Class template <code>tag</code></a></h3> | |
| 76 | ||
| 77 | <p> | |
| 78 | For any type <code>T</code>, <code>tag<T></code> is a suitable | |
| 79 | <a href="#tag">tag</a> for use in instantiations of | |
| 80 | <a href="flyweight.html#flyweight"><code>flyweight</code></a>. | |
| 81 | </p> | |
| 82 | ||
| 83 | <hr> | |
| 84 | ||
| 85 | <div class="prev_link"><a href="key_value.html"><img src="../prev.gif" alt="key-value flyweights" border="0"><br> | |
| 86 | Key-value flyweights | |
| 87 | </a></div> | |
| 88 | <div class="up_link"><a href="index.html"><img src="../up.gif" alt="Boost.Flyweight reference" border="0"><br> | |
| 89 | Boost.Flyweight reference | |
| 90 | </a></div> | |
| 91 | <div class="next_link"><a href="factories.html"><img src="../next.gif" alt="factories" border="0"><br> | |
| 92 | Factories | |
| 93 | </a></div><br clear="all" style="clear: all;"> | |
| 94 | ||
| 95 | <br> | |
| 96 | ||
| 97 | <p>Revised August 11th 2008</p> | |
| 98 | ||
| 99 | <p>© Copyright 2006-2008 Joaquín M López Muñoz. | |
| 100 | Distributed under the Boost Software | |
| 101 | License, Version 1.0. (See accompanying file <a href="../../../../LICENSE_1_0.txt"> | |
| 102 | LICENSE_1_0.txt</a> or copy at <a href="http://www.boost.org/LICENSE_1_0.txt"> | |
| 103 | http://www.boost.org/LICENSE_1_0.txt</a>) | |
| 104 | </p> | |
| 105 | ||
| 106 | </body> | |
| 107 | </html> |