projects / ceph.git / blame
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| 12 | <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> | |
| 13 | <table cellpadding="2" width="100%"><tr> | |
| 14 | <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td> | |
| 15 | <td align="center"><a href="../../../../../../../index.html">Home</a></td> | |
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| 22 | <div class="spirit-nav"> | |
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| 24 | </div> | |
| 25 | <div class="section"> | |
| 26 | <div class="titlepage"><div><div><h4 class="title"> | |
| 27 | <a name="phoenix.modules.core.nothing"></a><a class="link" href="nothing.html" title="Nothing">Nothing</a> | |
| 28 | </h4></div></div></div> | |
| 29 | <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">phoenix</span><span class="special">/</span><span class="identifier">core</span><span class="special">/</span><span class="identifier">nothing</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> | |
| 30 | </pre> | |
| 31 | <p> | |
| 32 | Finally, the <code class="computeroutput"><span class="identifier">expression</span><span class="special">::</span><span class="identifier">null</span><span class="special"><</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">void_</span><span class="special">>::</span><span class="identifier">type</span></code> | |
| 33 | does nothing; (a "bum", if you will :-) ). There's a sole <code class="computeroutput"><span class="identifier">expression</span><span class="special">::</span><span class="identifier">null</span><span class="special"><</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">void_</span><span class="special">>::</span><span class="identifier">type</span></code> instance named "nothing". | |
| 34 | This actor is actually useful in situations where we don't want to do anything. | |
| 35 | (See <a class="link" href="../statement/for_statement.html" title="for_ Statement">for_ Statement</a> | |
| 36 | for example). | |
| 37 | </p> | |
| 38 | </div> | |
| 39 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
| 40 | <td align="left"></td> | |
| 41 | <td align="right"><div class="copyright-footer">Copyright © 2002-2005, 2010, 2014, 2015 Joel de Guzman, Dan Marsden, Thomas | |
| 42 | Heller, John Fletcher<p> | |
| 43 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 44 | file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) | |
| 45 | </p> | |
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| 51 | </div> | |
| 52 | </body> | |
| 53 | </html> |