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| <title>BOOST_PP_LIST_TO_TUPLE_R</title> |
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| <div style="margin-left: 0px;"> The <b>BOOST_PP_LIST_TO_TUPLE_R</b> macro |
| converts a <i>list</i> to a <i>tuple</i>. It reenters <b>BOOST_PP_FOR</b> |
| with maximum efficiency. </div> |
| <h4>Usage</h4> |
| <div class="code"> <b>BOOST_PP_LIST_TO_TUPLE_R</b>(<i>r</i>, <i>list</i>) |
| </div> |
| <h4>Arguments</h4> |
| <dl> |
| <dt>r</dt> |
| <dd> The next available <b>BOOST_PP_FOR</b> repetition. </dd> |
| <dt>list</dt> |
| <dd> The <i>list</i> to be converted. </dd> |
| </dl> |
| <h4>Remarks</h4> |
| <p> If <i>list</i> is, for example, (<i>a</i>, (<i>b</i>, (<i>c</i>, |
| <b>BOOST_PP_NIL</b>))), this macro will produce: </p> |
| <div> |
| <div> (<i>a</i>, <i>b</i>, <i>c</i>) </div> |
| </div> |
| <h4><span style="font-weight: normal;"> If the <i>list</i> to |
| be converted is empty, as represented by 'BOOST_PP_NIL', the resulting <i>tuple</i> |
| is undefined since a <i>tuple</i> cannot be empty. </span></h4> |
| <h4>See Also</h4> |
| <ul> |
| <li><a href="list_to_tuple.html">BOOST_PP_LIST_TO_TUPLE</a></li> |
| </ul> |
| <h4>Requirements</h4> |
| <div> <b>Header:</b> <a href="../headers/list/to_tuple.html"><boost/preprocessor/list/to_tuple.hpp></a> |
| </div> |
| <h4>Sample Code</h4> |
| <div> |
| <pre>#include <<a href="../headers/list/adt.html">boost/preprocessor/list/adt.hpp</a>> |
| #include <<a href="../headers/list/to_tuple.html">boost/preprocessor/list/to_tuple.hpp</a>> |
| #include <<a href="../headers/repetition/for.html">boost/preprocessor/repetition/for.hpp</a>> |
| |
| #define LIST (x, (y, (z, <a href="nil.html">BOOST_PP_NIL</a>))) |
| |
| #define PRED(r, state) <a href="list_is_cons.html">BOOST_PP_LIST_IS_CONS</a>(state) |
| #define OP(r, state) <a href="list_rest.html">BOOST_PP_LIST_REST</a>(state) |
| #define MACRO(r, state) <a href="list_to_tuple_r.html">BOOST_PP_LIST_TO_TUPLE_R</a>(r, state) |
| |
| <a href="for.html">BOOST_PP_FOR</a>(LIST, PRED, OP, MACRO) |
| // expands to (x, y, z) (y, z) (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> |
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| </html> |
