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+<html>
+<head>
+ <title>BOOST_PP_EXPR_IIF</title>
+ <link rel="stylesheet" type="text/css" href="../styles.css">
+</head>
+<body>
+ <div style="margin-left: 0px;">
+ The <b>BOOST_PP_EXPR_IIF</b> macro expands to its second argument if its first argument is <i>1</i> and expands to nothing if its first argument is <i>0</i>.
+ </div>
+ <h4>Usage</h4>
+ <div class="code">
+ <b>BOOST_PP_EXPR_IIF</b>(<i>bit</i>, <i>expr</i>)
+ </div>
+ <h4>Arguments</h4>
+ <dl>
+ <dt>bit</dt>
+ <dd>
+ The condition that determines if the result is <i>expr</i> or nothing.
+ This value must expand to <i>0</i> or </i>1</i>.
+ </dd>
+ <dt>expr</dt>
+ <dd>
+ The result of the expansion if <i>bit</i> is <i>1</i>.
+ </dd>
+ </dl>
+ <h4>Remarks</h4>
+ <div>
+ This macro <i>does not</i> perform a boolean conversion on its first argument.
+ If that conversion is necessary, use <b>BOOST_PP_EXPR_IF</b> instead.
+ </div>
+ <h4>See Also</h4>
+ <ul>
+ <li><a href="expr_if.html">BOOST_PP_EXPR_IF</a></li>
+ <li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
+ </ul>
+ <h4>Requirements</h4>
+ <div>
+ <b>Header:</b> <a href="../headers/control/expr_iif.html"><boost/preprocessor/control/expr_iif.hpp></a>
+ </div>
+ <h4>Sample Code</h4>
+<div><pre>
+#include <<a href="../headers/logical/and.html">boost/preprocessor/logical/and.hpp</a>>
+#include <<a href="../headers/control/expr_iif.html">boost/preprocessor/control/expr_iif.hpp</a>>
+
+#define INSERT_AND(p, q, text) \
+ <a href="expr_iif.html">BOOST_PP_EXPR_IIF</a>( \
+ <a href="and.html">BOOST_PP_AND</a>(p, q), \
+ text \
+ ) \
+ /**/
+
+INSERT_AND(2, 3, abc) // expands to abc
+INSERT_AND(0, 7, xyz) // expands to nothing
+</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>