1<html> 2<head> 3 <title>BOOST_PP_LPAREN</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_LPAREN</b> macro expands to a left parenthesis. 9 </div> 10 <h4>Usage</h4> 11 <div class="code"> 12 <b>BOOST_PP_LPAREN</b>() 13 </div> 14 <h4>Remarks</h4> 15 <div> 16 The preprocessor interprets parentheses as delimiters in macro invocations. 17 Because of this, parentheses require special handling. 18 </div> 19 <h4>See Also</h4> 20 <ul> 21 <li><a href="rparen.html">BOOST_PP_RPAREN</a></li> 22 </ul> 23 <h4>Requirements</h4> 24 <div> 25 <b>Header:</b> <a href="../headers/punctuation/paren.html"><boost/preprocessor/punctuation/paren.hpp></a> 26 </div> 27 <h4>Sample Code</h4> 28<div><pre> 29#include <<a href="../headers/punctuation/paren.html">boost/preprocessor/punctuation/paren.hpp</a>> 30 31#define X(x) x 32#define MACRO(p, x) X p x ) 33 34MACRO(<a href="lparen.html">BOOST_PP_LPAREN</a>(), abc) // expands to abc 35 36#define Y(x) 37 38MACRO((10) Y <a href="lparen.html">BOOST_PP_LPAREN</a>(), result) // expands to 10 39</pre></div> 40 <hr size="1"> 41 <div style="margin-left: 0px;"> 42 <i>� Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> 43 </br><i>� Copyright Paul Mensonides 2002</i> 44 </div> 45 <div style="margin-left: 0px;"> 46 <p><small>Distributed under the Boost Software License, Version 1.0. (See 47 accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or 48 copy at <a href= 49 "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> 50 </div> 51</body> 52</html> 53