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<h2><span class="refentrytitle">Struct template placeholder</span></h2>
<p>boost::xpressive::placeholder</p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../xpressive/reference.html#header.boost.xpressive.regex_actions_hpp" title="Header &lt;boost/xpressive/regex_actions.hpp&gt;">boost/xpressive/regex_actions.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">int</span> I<span class="special">,</span> <span class="keyword">typename</span> Dummy<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="placeholder.html" title="Struct template placeholder">placeholder</a> <span class="special">{</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <a class="link" href="placeholder.html" title="Struct template placeholder">placeholder</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">I</span><span class="special">,</span> <span class="identifier">Dummy</span> <span class="special">&gt;</span> <a name="boost.xpressive.placeholder.this_type"></a><span class="identifier">this_type</span><span class="special">;</span>      
  <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span>                <a name="boost.xpressive.placeholder.action_arg_type"></a><span class="identifier">action_arg_type</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp259424792"></a><h2>Description</h2>
<p>placeholder&lt;T&gt;, for defining a placeholder to stand in fo a variable of type T in a semantic action. </p>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2007 Eric Niebler<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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