| Brian Silverman | f27e085 | 2018-08-04 23:56:45 -0700 | [diff] [blame^] | 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 | |
| 34 | MACRO(<a href="lparen.html">BOOST_PP_LPAREN</a>(), abc) // expands to abc |
| 35 | |
| 36 | #define Y(x) |
| 37 | |
| 38 | MACRO((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> |