1<html> 2<head> 3 <title>BOOST_PP_CAT</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_CAT</b> macro concatenates its arguments after they have been expanded. 9 </div> 10 <h4>Usage</h4> 11 <div class="code"> 12 <b>BOOST_PP_CAT</b>(<i>a</i>, <i>b</i>) 13 </div> 14 <h4>Arguments</h4> 15 <dl> 16 <dt>a</dt> 17 <dd> 18 The left operand of the concatenation. 19 </dd> 20 <dt>b</dt> 21 <dd> 22 The right operand of the concatenation. 23 </dd> 24 </dl> 25 <h4>Remarks</h4> 26 <div> 27 The preprocessor token-pasting operator (<b>##</b>) prevents arguments from expanding. 28 This macro allows its arguments to expand before concatenation. 29 </div> 30 <div> 31 Concatenation must not result in an invocation of a macro that uses <b>BOOST_PP_CAT</b>. 32 If that happens, <b>BOOST_PP_CAT</b> will not expand the second time. 33 </div> 34<!-- <h4>See Also</h4> --> 35 <h4>Requirements</h4> 36 <div> 37 <b>Header:</b> <a href="../headers/cat.html"><boost/preprocessor/cat.hpp></a> 38 </div> 39 <h4>Sample Code</h4> 40<div><pre> 41#include <<a href="../headers/cat.html">boost/preprocessor/cat.hpp</a>> 42 43<a href="cat.html">BOOST_PP_CAT</a>(x, <a href="cat.html">BOOST_PP_CAT</a>(y, z)) // expands to xyz 44</pre></div> 45 <hr size="1"> 46 <div style="margin-left: 0px;"> 47 <i>� Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> 48 </br><i>� Copyright Paul Mensonides 2002</i> 49 </div> 50 <div style="margin-left: 0px;"> 51 <p><small>Distributed under the Boost Software License, Version 1.0. (See 52 accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or 53 copy at <a href= 54 "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> 55 </div> 56</body> 57</html> 58