<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Semantic Actions</title> <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.75.0"> <link rel="home" href="../../../index.html" title="Spirit 2.4"> <link rel="up" href="../quick_reference.html" title="Quick Reference"> <link rel="prev" href="lexers.html" title="Primitive Lexer Components"> <link rel="next" href="phoenix.html" title="Phoenix"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td> <td align="center"><a href="../../../../../../../index.html">Home</a></td> <td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../../../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="lexers.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../quick_reference.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="phoenix.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h4 class="title"> <a name="spirit.lex.quick_reference.semantic_actions"></a><a class="link" href="semantic_actions.html" title="Semantic Actions">Semantic Actions</a> </h4></div></div></div> <p> Has the form: </p> <pre class="programlisting"><span class="identifier">l</span><span class="special">[</span><span class="identifier">f</span><span class="special">]</span> </pre> <p> where <code class="computeroutput"><span class="identifier">f</span></code> is a function with the signatures: </p> <pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">();</span> <span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">Iterator</span><span class="special">&);</span> <span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">pass_flag</span><span class="special">&);</span> <span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">pass_flag</span><span class="special">&,</span> <span class="identifier">Idtype</span><span class="special">&);</span> <span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">pass_flag</span><span class="special">&,</span> <span class="identifier">Idtype</span><span class="special">&,</span> <span class="identifier">Context</span><span class="special">&);</span> </pre> <p> You can use <a href="../../../../../../../libs/bind/index.html" target="_top">Boost.Bind</a> to bind member functions. For function objects, the allowed signatures are: </p> <pre class="programlisting"><span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">unused_type</span><span class="special">,</span> <span class="identifier">unused_type</span><span class="special">,</span> <span class="identifier">unused_type</span><span class="special">,</span> <span class="identifier">unused_type</span><span class="special">,</span> <span class="identifier">unused_type</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">unused_type</span><span class="special">,</span> <span class="identifier">unused_type</span><span class="special">,</span> <span class="identifier">unused_type</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">pass_flag</span><span class="special">&,</span> <span class="identifier">unused_type</span><span class="special">,</span> <span class="identifier">unused_type</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">pass_flag</span><span class="special">&,</span> <span class="identifier">Idtype</span><span class="special">&,</span> <span class="identifier">unused_type</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">Iterator</span><span class="special">&,</span> <span class="identifier">pass_flag</span><span class="special">&,</span> <span class="identifier">Idtype</span><span class="special">&,</span> <span class="identifier">Context</span><span class="special">&)</span> <span class="keyword">const</span><span class="special">;</span> </pre> <p> The <code class="computeroutput"><span class="identifier">unused_type</span></code> is used in the signatures above to signify 'don't care'. </p> <p> For more information see <a class="link" href="../abstracts/lexer_semantic_actions.html" title="Lexer Semantic Actions">Lexer Semantic Actions</a>. </p> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2001-2010 Joel de Guzman, Hartmut Kaiser<p> Distributed under the Boost Software License, Version 1.0. (See accompanying 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>) </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="lexers.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../quick_reference.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="phoenix.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>