boost_preprocessor 0.1.0

Boost C++ library boost_preprocessor packaged using Zanbil
Documentation 
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<html>
<head>
	<title>BOOST_PP_EXPAND</title>
	<link rel="stylesheet" type="text/css" href="../styles.css">
</head>
<body>
	<div style="margin-left:  0px;">
		The <b>BOOST_PP_EXPAND</b> macro performs a double macro-expansion on its argument.
	</div>
	<h4>Usage</h4>
		<div class="code">
			<b>BOOST_PP_EXPAND</b>(<i>x</i>)
		</div>
	<h4>Arguments</h4>
		<dl>
			<dt>x</dt>
			<dd>
				The argument to be expanded twice.
			</dd>
		</dl>
	<h4>Remarks</h4>
		<div>
			This macro is useful when a delay is necessary to produce the correct semantics of a macro invocation.&nbsp;
			For example, when a macro expands to an argument list to another macro.&nbsp;
			This macro will expand the argument list on the first pass, and then rescan to expand any more macros.
		</div>
	<h4>Requirements</h4>
		<div>
			<b>Header:</b> &nbsp;<a href="../headers/facilities/expand.html">&lt;boost/preprocessor/facilities/expand.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/expand.html">boost/preprocessor/facilities/expand.hpp</a>&gt;

#define MACRO(a, b, c) (a)(b)(c)
#define ARGS() (1, 2, 3)

<a href="expand.html">BOOST_PP_EXPAND</a>(MACRO ARGS()) // expands to (1)(2)(3)

#define SAMPLE(n) \
   <a href="expand.html">BOOST_PP_EXPAND</a>( \
      MACRO \
      <a href="if.html">BOOST_PP_IF</a>( \
         n, \
         (x, y, z), \
         (a, b, c) \
      ) \
   ) \
   /**/

SAMPLE(0) // expands to (a)(b)(c)
SAMPLE(1) // expands to (x)(y)(z)
</pre></div>
	<hr size="1">
	<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>
	</div>
</body>
</html>