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	<title>BOOST_PP_IDENTITY</title>
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	<div style="margin-left:  0px;">
		The <b>BOOST_PP_IDENTITY</b> macro expands to its argument when invoked.
	</div>
	<h4>Usage</h4>
		<div class="code">
			<b>BOOST_PP_IDENTITY</b>(<i>item</i>)()
		</div>
	<h4>Arguments</h4>
		<dl>
			<dt>item</dt>
			<dd>
				The result of the expansion.
			</dd>
		</dl>
	<h4>Remarks</h4>
		<div>
			This macro is designed to be used with <b>BOOST_PP_IF</b> and <b>BOOST_PP_IIF</b> when only one of the clauses needs to be invoked.
		</div>
	<h4>See Also</h4>
		<ul>
			<li><a href="if.html">BOOST_PP_IF</a></li>
			<li><a href="iif.html">BOOST_PP_IIF</a></li>
		</ul>
	<h4>Requirements</h4>
		<div>
			<b>Header:</b> &nbsp;<a href="../headers/facilities/identity.html">&lt;boost/preprocessor/facilities/identity.hpp&gt;</a>
		</div>
	<h4>Sample Code</h4>
<div><pre>
#include &lt;<a href="../headers/control/if.html">boost/preprocessor/control/if.hpp</a>&gt;
#include &lt;<a href="../headers/facilities/empty.html">boost/preprocessor/facilities/empty.hpp</a>&gt;
#include &lt;<a href="../headers/facilities/identity.html">boost/preprocessor/facilities/identity.hpp</a>&gt;

#define MACRO(n) <a href="if.html">BOOST_PP_IF</a>(n, <a href="identity.html">BOOST_PP_IDENTITY</a>(x), <a href="empty.html">BOOST_PP_EMPTY</a>)()

MACRO(0) // expands to nothing
MACRO(1) // expands to x
</pre></div>
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	<div style="margin-left: 0px;">
		<i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
		</br><i>© Copyright Paul Mensonides 2002</i>
	</div>
	<div style="margin-left: 0px;">
		<p><small>Distributed under the Boost Software License, Version 1.0. (See
		accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
		copy at <a href=
		"http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
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