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<html> <head> <title>BOOST_PP_DEDUCE_Z</title> <link rel="stylesheet" type="text/css" href="../styles.css"> </head> <body> <div style="margin-left: 0px;"> The <b>BOOST_PP_DEDUCE_Z</b> macro manually deduces the state of the <b>BOOST_PP_REPEAT</b> construct. </div> <h4>Usage</h4> <div class="code"> <b>BOOST_PP_DEDUCE_Z</b>() </div> <h4>Remarks</h4> <div> This macro is intended to avoid the use of <i>automatic-recursion</i> at deep expansion depths. <i>Automatic-recursion</i> at such depths can be inefficient on some preprocessors. It is not intended to be used directly with the invocation of macros with a <b>_Z</b> suffix such as: <div> <b>BOOST_PP_ENUM_PARAMS_Z</b>(<b>BOOST_PP_DEDUCE_Z</b>(), (a, (b, (c, <b>BOOST_PP_NIL</b>)))) </div> If it is used in this context, the <b>_Z</b> macro will fail. The <b>_Z</b> macros directly concatenate to the <i>r</i> parameter that is passed to them, which would prevent <b>BOOST_PP_DEDUCE_Z</b>() from expanding. Furthermore, it is pointless to use this macro in a situation such as this because it would already be too late to gain any efficiency. </div> <h4>See Also</h4> <ul> <li><a href="repeat.html">BOOST_PP_REPEAT</a></li> </ul> <h4>Requirements</h4> <div> <b>Header:</b> <a href="../headers/repetition/deduce_z.html"><boost/preprocessor/repetition/deduce_z.hpp></a> </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>
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