2002-03-08 07:30:26 +00:00
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<title>Boost.Preprocessor - Reference</title>
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<h3><a href="../../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../../c++boost.gif" border="0"></a></h3>
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<h1 align="center">Boost.Preprocessor</h1>
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<h2 align="center">Reference</h2>
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2002-03-11 16:11:34 +00:00
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<a href="expand.htm">Prev</a> <a href="for.htm">Next</a> <a href="index.htm#Macros">Macros</a> <a href="index.htm#Headers">Headers</a>
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2002-03-08 07:30:26 +00:00
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2002-03-11 16:11:34 +00:00
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<h1>#include <<a href="../../../../boost/preprocessor/expr_if.hpp">boost/preprocessor/expr_if.hpp</a>></h1>
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2002-04-12 11:26:25 +00:00
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<h2><a name="BOOST_PP_EXPR_IF">#define BOOST_PP_EXPR_IF</a>(COND,EXPR)</h2>
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<p>Expands to <code>EXPR</code> if <code>COND != 0</code> and to nothing if <code>COND == 0</code>.</p>
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2002-04-12 12:16:05 +00:00
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<p><code>COND</code> must expand to an integer literal in the range [0, <a href="limits.htm#BOOST_PP_LIMIT_MAG">BOOST_PP_LIMIT_MAG</a>].</p>
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<p>For example, <code><a href="expr_if.htm#BOOST_PP_EXPR_IF">BOOST_PP_EXPR_IF</a>(1,^)</code> expands to <code>^</code>.</p>
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<h3>See</h3>
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<ul>
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<li><a href="if.htm#BOOST_PP_IF">BOOST_PP_IF</a>()</li>
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</ul>
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2002-03-09 13:55:00 +00:00
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2002-03-08 07:30:26 +00:00
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<hr>
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2002-03-11 16:11:34 +00:00
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<a href="expand.htm">Prev</a> <a href="for.htm">Next</a> <a href="index.htm#Macros">Macros</a> <a href="index.htm#Headers">Headers</a>
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2002-03-08 07:30:26 +00:00
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<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %b %Y" startspan --><!--webbot bot="Timestamp" endspan i-checksum="15246" --></p>
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<p><i>© Copyright <a href="http://www.housemarque.com">Housemarque Oy</a> 2002</i></p>
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<p><i>Permission to copy, use, modify, sell and distribute this document is granted
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provided this copyright notice appears in all copies. This document is provided
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"as is" without express or implied warranty, and with no claim as to its suitability
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for any purpose.</i></p>
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