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- <title>BOOST_PP_IIF</title>
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- The <b>BOOST_PP_IIF</b> macro chooses between to values based on a bitwise condition.
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- <h4>Usage</h4>
- <div class="code">
- <b>BOOST_PP_IIF</b>(<i>bit</i>, <i>t</i>, <i>f</i>)
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- <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>t</dt>
- <dd>
- The result of the expansion if <i>bit</i> is <i>1</i>.
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- <dt>f</dt>
- <dd>
- The result of the expansion if <i>bit</i> is <i>0</i>.
- </dd>
- </dl>
- <h4>Remarks</h4>
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- This macro <i>does not</i> perform a boolean conversion on its first argument.
- If that conversion is necessary, use <b>BOOST_PP_IF</b> instead.
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- <h4>See Also</h4>
- <ul>
- <li><a href="if.html">BOOST_PP_IF</a></li>
- <li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
- </ul>
- <h4>Requirements</h4>
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- <b>Header:</b> <a href="../headers/control/iif.html"><boost/preprocessor/control/iif.hpp></a>
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- <h4>Sample Code</h4>
- <div><pre>
- #include <<a href="../headers/control/iif.html">boost/preprocessor/control/iif.hpp</a>>
- #include <<a href="../headers/logical/or.html">boost/preprocessor/logical/or.hpp</a>>
- #define OR_IF(p, q, t, f) <a href="iif.html">BOOST_PP_IIF</a>(<a href="or.html">BOOST_PP_OR</a>(p, q), t, f)
- OR_IF(1, 0, abc, xyz) // expands to abc
- OR_IF(0, 0, abc, xyz) // expands to xyz
- </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>
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