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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="spirit.karma.quick_reference.semantic_actions"></a><a class="link" href="semantic_actions.html" title="Generator Semantic Actions">Generator |
| Semantic Actions</a> |
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| <p> |
| Semantic Actions may be attached to any generator as follows: |
| </p> |
| <pre class="programlisting"><span class="identifier">g</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="identifier">Attrib</span><span class="special">&);</span> |
| <span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Attrib</span><span class="special">&,</span> <span class="identifier">Context</span><span class="special">&);</span> |
| <span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Attrib</span><span class="special">&,</span> <span class="identifier">Context</span><span class="special">&,</span> <span class="keyword">bool</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">Attrib</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">Attrib</span><span class="special">&,</span> <span class="identifier">Context</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">Attrib</span><span class="special">&,</span> <span class="identifier">Context</span><span class="special">&,</span> <span class="keyword">bool</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="../tutorials/semantic_actions.html" title="Generator Semantic Actions">Semantic |
| Actions</a>. |
| </p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2001-2011 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>) |
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