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- <h1><img src="../../../../boost.png" alt="Boost logo" align=
- "middle" width="277" height="86">Boost.Flyweight
- Tags reference</h1>
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- Key-value flyweights
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- <h2>Contents</h2>
- <ul>
- <li><a href="#tag">Tags</a></li>
- <li><a href="#tag_synopsis">Header
- <code>"boost/flyweight/tag.hpp"</code> synopsis</a>
- <ul>
- <li><a href="#tag_construct">Class template <code>tag</code></a></li>
- </ul>
- </li>
- </ul>
- <h2><a name="tag">Tags</a></h2>
- <p>
- A <i>tag</i> is a type of the form
- <a href="#tag_construct"><code>tag<T></code></a> for some arbitrary
- <code>T</code>.
- In the context of Boost.Flyweight, tags are syntactic artifacts used
- to differentiate instantiations of the class template
- <a href="flyweight.html#flyweight"><code>flyweight</code></a> which would
- otherwise be identical. Tagging a <code>flyweight</code> instantiation with
- a tag type local to a given context ensures that the global resources
- of that instantiation (for instance, the associated
- <a href="factories.html#factory">factory class</a>) will not be unintentionally
- shared by other areas of the program.
- </p>
- <h2><a name="tag_synopsis">Header
- <a href="../../../../boost/flyweight/tag.hpp"><code>"boost/flyweight/tag.hpp"</code></a> synopsis</a></h2>
- <blockquote><pre>
- <span class=keyword>namespace</span> <span class=identifier>boost</span><span class=special>{</span>
- <span class=keyword>namespace</span> <span class=identifier>flyweights</span><span class=special>{</span>
- <span class=keyword>template</span><span class=special><</span><span class=keyword>typename</span> <span class=identifier>T</span><span class=special>></span>
- <span class=keyword>struct</span> <span class=identifier>tag</span><span class=special>;</span>
- <span class=special>}</span> <span class=comment>// namespace boost::flyweights</span>
- <span class=special>}</span> <span class=comment>// namespace boost</span>
- </pre></blockquote>
- <h3><a name="tag_construct">Class template <code>tag</code></a></h3>
- <p>
- For any type <code>T</code>, <code>tag<T></code> is a suitable
- <a href="#tag">tag</a> for use in instantiations of
- <a href="flyweight.html#flyweight"><code>flyweight</code></a>.
- </p>
- <hr>
- <div class="prev_link"><a href="key_value.html"><img src="../prev.gif" alt="key-value flyweights" border="0"><br>
- Key-value flyweights
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- Boost.Flyweight reference
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- <br>
- <p>Revised August 11th 2008</p>
- <p>© Copyright 2006-2008 Joaquín M López Muñoz.
- Distributed under the Boost Software
- License, Version 1.0. (See accompanying file <a href="../../../../LICENSE_1_0.txt">
- LICENSE_1_0.txt</a> or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">
- http://www.boost.org/LICENSE_1_0.txt</a>)
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