1<html> 2<head> 3 <title>BOOST_PP_REPEAT_FROM_TO_z</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_REPEAT_FROM_TO_<i>z</i></b> macro represents a reentry into the <b>BOOST_PP_REPEAT_FROM_TO</b> repetition construct. 9 </div> 10 <h4>Usage</h4> 11 <div class="code"> 12 <b>BOOST_PP_REPEAT_FROM_TO_</b> ## <i>z</i>(<i>first</i>, <i>last</i>, <i>macro</i>, <i>data</i>) 13 </div> 14 <h4>Arguments</h4> 15 <dl> 16 <dt>z</dt> 17 <dd> 18 The next available <b>BOOST_PP_REPEAT</b> dimension. 19 </dd> 20 <dt>first</dt> 21 <dd> 22 The lower bound of the repetition. 23 Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>. 24 </dd> 25 <dt>last</dt> 26 <dd> 27 The upper bound of the repetition. 28 Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>. 29 </dd> 30 <dt>macro</dt> 31 <dd> 32 A ternary operation of the form <i>macro</i>(<i>z</i>, <i>n</i>, <i>data</i>). 33 This macro is expanded by <b>BOOST_PP_REPEAT</b> with the next available repetition depth, 34 the current repetition number, and the auxiliary <i>data</i> argument. 35 </dd> 36 <dt>data</dt> 37 <dd> 38 Auxiliary data passed to <i>macro</i>. 39 </dd> 40 </dl> 41 <h4>Remarks</h4> 42 <div> 43 This macro expands to the sequence: 44 <div> 45 <i>macro</i>(<i>z</i>, <i>first</i>, <i>data</i>) <i>macro</i>(<i>z</i>, <i>first</i> + <i>1</i>, <i>data</i>) ... <i>macro</i>(<i>z</i>, <i>last</i> - <i>1</i>, <i>data</i>) 46 </div> 47 </div> 48 <div> 49 The number of repetitions (i.e. <i>last</i> - <i>first</i>) must not exceed <b>BOOST_PP_LIMIT_REPEAT</b>. 50 </div> 51 <div> 52 At certain times, it may be necessary to perform the concatenation with <b>BOOST_PP_CAT</b> rather than the preprocessor token-pasting operator. 53 This happens when the <i>z</i> value is a macro invocation itself. 54 It needs a delay to allow it to expand. 55 The syntax in such a scenario becomes: 56 <div> 57 <b>BOOST_PP_CAT</b>(<b>BOOST_PP_REPEAT_FROM_TO_</b>, <i>z</i>)(<i>count</i>, <i>macro</i>, <i>data</i>). 58 </div> 59 </div> 60 <h4>See Also</h4> 61 <ul> 62 <li><a href="cat.html">BOOST_PP_CAT</a></li> 63 <li><a href="limit_repeat.html">BOOST_PP_LIMIT_REPEAT</a></li> 64 <li><a href="repeat.html">BOOST_PP_REPEAT</a></li> 65 </ul> 66 <h4>Requirements</h4> 67 <div> 68 <b>Header:</b> <a href="../headers/repetition/repeat_from_to.html"><boost/preprocessor/repetition/repeat_from_to.hpp></a> 69 </div> 70 <h4>Sample Code</h4> 71<div><pre> 72#include <<a href="../headers/repetition/repeat_from_to.html">boost/preprocessor/repetition/repeat_from_to.hpp</a>> 73 74#define TEXT(z, n, data) n data 75 76#define MACRO(z, n, data) \ 77 ( \ 78 <a href="repeat_from_to_z.html">BOOST_PP_REPEAT_FROM_TO_</a> ## z( \ 79 1, 4, \ 80 TEXT, xyz \ 81 ) \ 82 ) \ 83 /**/ 84 85<a href="repeat.html">BOOST_PP_REPEAT</a>(3, MACRO, _) 86 /* 87 expands to: 88 (1 xyz 2 xyz 3 xyz) 89 (1 xyz 2 xyz 3 xyz) 90 (1 xyz 2 xyz 3 xyz) 91 */ 92</pre></div> 93 <hr size="1"> 94 <div style="margin-left: 0px;"> 95 <i>� Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> 96 </br><i>� Copyright Paul Mensonides 2002</i> 97 </div> 98 <div style="margin-left: 0px;"> 99 <p><small>Distributed under the Boost Software License, Version 1.0. (See 100 accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or 101 copy at <a href= 102 "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> 103 </div> 104</body> 105</html> 106