1<html> 2<head> 3 <title>BOOST_PP_SEQ_ELEM</title> 4 <link rel="stylesheet" type="text/css" href="../styles.css"> 5</head> 6<body> 7 <div style="margin-left: 0px;"> 8 The <b>BOOST_PP_SEQ_ELEM</b> macro extracts an element from a <i>seq</i>. 9 </div> 10 <h4> 11 Usage 12 </h4> 13 <div class="code"> 14 <b>BOOST_PP_SEQ_ELEM</b>(<i>i</i>, <i>seq</i>) 15 </div> 16 <h4> 17 Arguments 18 </h4> 19 <dl> 20 <dt>i</dt> 21 <dd> 22 The zero-based index of the element to be extracted. 23 </dd> 24 <dt>seq</dt> 25 <dd> 26 The <i>seq</i> from which an element is to be extracted. 27 </dd> 28 </dl> 29 <h4> 30 Remarks 31 </h4> 32 <div> 33 The index <i>i</i> must be in the range of <i>0</i> to <b>BOOST_PP_SEQ_SIZE</b>(<i>seq</i>) 34 - <i>1</i>. 35 </div> 36 <h4> 37 Requirements 38 </h4> 39 <div> 40 <b>Header:</b> <a href="../headers/seq/elem.html"><boost/preprocessor/seq/elem.hpp></a> 41 </div> 42 <h4> 43 Sample Code 44 </h4> 45 <div> 46 <pre>#include <<a href="../headers/seq/elem.html">boost/preprocessor/seq/elem.hpp</a>><br><br><a href="seq_elem.html">BOOST_PP_SEQ_ELEM</a>(1, (a)(b)(c)) // expands to b<br><br>#define SEQ \<br> (0)(1)(2)(3)(4)(5)(6)(7)(8)(9) \<br> (10)(11)(12)(13)(14)(15)(16)(17)(18)(19) \<br> (20)(21)(22)(23)(24)(25)(26)(27)(28)(29) \<br> (30)(31)(32)(33)(34)(35)(36)(37)(38)(39) \<br> (40)(41)(42)(43)(44)(45)(46)(47)(48)(49) \<br> (50)(51)(52)(53)(54)(55)(56)(57)(58)(59) \<br> (60)(61)(62)(63)(64)(65)(66)(67)(68)(69) \<br> (70)(71)(72)(73)(74)(75)(76)(77)(78)(79) \<br> (80)(81)(82)(83)(84)(85)(86)(87)(88)(89) \<br> (90)(91)(92)(93)(94)(95)(96)(97)(98)(99) \<br> /**/<br><br><a href="seq_elem.html">BOOST_PP_SEQ_ELEM</a>(88, SEQ) // expands to 88<br></pre> 47 </div> 48 <hr size="1"> 49 <div style="margin-left: 0px;"> 50 <i>� Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> 51 <br><i>� Copyright Paul Mensonides 2002</i> 52 </div> 53 <div style="margin-left: 0px;"> 54 <p><small>Distributed under the Boost Software License, Version 1.0. (See 55 accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or 56 copy at <a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> 57 </div> 58</body> 59</html> 60