1<html> 2 <head> 3 <title>BOOST_PP_SEQ_FOR_EACH_I</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_FOR_EACH_I</b> macro repeats a macro for each element in a <i>seq</i>. 9 </div> 10 <h4> 11 Usage 12 </h4> 13 <div class="code"> 14 <b>BOOST_PP_SEQ_FOR_EACH_I</b>(<i>macro</i>, <i>data</i>, <i>seq</i>) 15 </div> 16 <h4> 17 Arguments 18 </h4> 19 <dl> 20 <dt>macro</dt> 21 <dd> 22 A macro of the form <i>macro</i>(<i>r</i>, <i>data</i>, <i>i</i>, <i>elem</i>). 23 This macro is expanded by <b>BOOST_PP_SEQ_FOR_EACH_I</b> with each element in <i>seq</i>. 24 It is expanded with the next available <b>BOOST_PP_FOR</b> repetition, the 25 auxiliary <i>data</i>, the index of the current element, and the current 26 element. 27 </dd> 28 <dt>data</dt> 29 <dd> 30 Auxiliary data passed to <i>macro</i>. 31 </dd> 32 <dt>seq</dt> 33 <dd> 34 The <i>seq</i> for which <i>macro</i> will be invoked on each element. 35 </dd> 36 </dl> 37 <h4> 38 Remarks 39 </h4> 40 <div> 41 This macro is a repetition construct. If <i>seq</i> is (<i>a</i>)(<i>b</i>)(<i>c</i>), 42 it expands to the sequence: 43 <div> 44 <i>macro</i>(<i>r</i>, <i>data</i>, <i>0</i>, <i>a</i>) <i>macro</i>(<i>r</i>, <i>data</i>, 45 <i>1</i>, <i>b</i>) <i>macro</i>(<i>r</i>, <i>data</i>, <i>2</i>, <i>c</i>) 46 </div> 47 </div> 48 <div> 49 For maximum efficiency, use <b>BOOST_PP_SEQ_FOR_EACH_I_R</a></li> 50 </div> 51 <h4> 52 See Also 53 </h4> 54 <ul> 55 <li> 56 <a href="seq_for_each_i_r.html">BOOST_PP_SEQ_FOR_EACH_I_R</a></li> 57 </ul> 58 <h4> 59 Requirements 60 </h4> 61 <div> 62 <b>Header:</b> <a href="../headers/seq/for_each_i.html"><boost/preprocessor/seq/for_each_i.hpp></a> 63 </div> 64 <h4> 65 Sample Code 66 </h4> 67 <div> 68 <pre> 69#include <<a href="../headers/cat.html">boost/preprocessor/cat.hpp</a>> 70#include <<a href="../headers/seq/for_each_i.html">boost/preprocessor/seq/for_each_i.hpp</a>> 71 72#define SEQ (a)(b)(c)(d) 73 74#define MACRO(r, data, i, elem) <a href="cat.html">BOOST_PP_CAT</a>(elem, <a href="cat.html">BOOST_PP_CAT</a>(data, i)) 75 76<a href="seq_for_each_i.html">BOOST_PP_SEQ_FOR_EACH_I</a>(MACRO, _, SEQ) // expands to a_0 b_1 c_2 d_3 77</pre> 78 </div> 79 <hr size="1"> 80 <div style="margin-left: 0px;"> 81 <i>� Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> 82 </br><i>� Copyright Paul Mensonides 2002</i> 83 </div> 84 <div style="margin-left: 0px;"> 85 <p><small>Distributed under the Boost Software License, Version 1.0. (See 86 accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or 87 copy at <a href= 88 "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> 89 </div> 90 </body> 91</html> 92