1<html> 2 <head> 3 <meta content="text/html; charset=windows-1252" http-equiv="content-type"> 4 <title>lists.html</title> 5 <link rel="stylesheet" type="text/css" href="../styles.css"> 6 </head> 7 <body> 8 <h4>Lists</h4> 9 <div> A <i>list</i> is a simple cons-style list with a head and a 10 tail. The head of a <i>list</i> is an element, and the tail is 11 either another <i>list</i> or <b>BOOST_PP_NIL</b>. For example, </div> 12 <div class="code"> (<i>a</i>, (<i>b</i>, (<i>c</i>, <b>BOOST_PP_NIL</b>))) 13 </div> 14 <div> ...is a <i>list</i> of <i>3</i> elements--<i>a</i>, <i>b</i>, and <i>c</i>. 15 </div> 16 <div> This allows macro parameters to be variable in size and allows data 17 states to change size without the user explicitly keeping track of the 18 size independently.<br> 19 <br> 20 A list can be empty and therefore have a size of 0. An empty list is 21 represented by the notation <b>BOOST_PP_NIL.<br> 22 <br> 23 </b></div> 24 <div> Elements of a <i>list</i> can be extracted with <b>BOOST_PP_LIST_FIRST</b> 25 and <b>BOOST_PP_LIST_REST</b>. </div> 26 <h4>Primitives</h4> 27 <ul> 28 <li><a href="../ref/list_first.html">BOOST_PP_LIST_FIRST</a></li> 29 <li><a href="../ref/list_rest.html">BOOST_PP_LIST_REST</a></li> 30 <li><a href="../ref/nil.html">BOOST_PP_NIL</a></li> 31 </ul> 32 <hr size="1"> 33 <div style="margin-left: 0px;"> <i>� Copyright <a href="http://www.housemarque.com" 34 target="_top">Housemarque Oy</a> 2002</i> <br> 35 <i>� Copyright Paul Mensonides 2002</i> </div> 36 <div style="margin-left: 0px;"> 37 <p><small>Distributed under the Boost Software License, Version 1.0. (See 38 accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> 39 or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> 40 </div> 41 </body> 42</html> 43