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<h2><span class="refentrytitle">Struct external_transform</span></h2>
<p>boost::proto::external_transform &#8212; A placeholder for use as the second parameter for <code class="computeroutput"><a class="link" href="when.html" title="Struct template when">proto::when</a></code>
to indicate that the rule's transform is specified externally.</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="../../proto/reference.html#header.boost.proto.transform.when_hpp" title="Header &lt;boost/proto/transform/when.hpp&gt;">boost/proto/transform/when.hpp</a>&gt;
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<span class="keyword">struct</span> <a class="link" href="external_transform.html" title="Struct external_transform">external_transform</a> <span class="special">{</span>
<span class="special">}</span><span class="special">;</span></pre></div>
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<a name="idp385965040"></a><h2>Description</h2>
<p>
See <code class="computeroutput"><a class="link" href="external_transforms.html" title="Struct template external_transforms">proto::external_transforms</a></code> for an example.
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<td align="right"><div class="copyright-footer">Copyright &#169; 2008 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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