| Brian Silverman | f27e085 | 2018-08-04 23:56:45 -0700 | [diff] [blame^] | 1 | <html> |
| 2 | <head> |
| 3 | <title>BOOST_PP_COMMA</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_COMMA</b> macro expands to a comma. |
| 9 | </div> |
| 10 | <h4>Usage</h4> |
| 11 | <div class="code"> |
| 12 | <b>BOOST_PP_COMMA</b>() |
| 13 | </div> |
| 14 | <h4>Remarks</h4> |
| 15 | <div> |
| 16 | The preprocessor interprets commas as argument separators in macro invocations. |
| 17 | Because of this, commas require special handling. |
| 18 | </div> |
| 19 | <h4>Requirements</h4> |
| 20 | <div> |
| 21 | <b>Header:</b> <a href="../headers/punctuation/comma.html"><boost/preprocessor/punctuation/comma.hpp></a> |
| 22 | </div> |
| 23 | <h4>Sample Code</h4> |
| 24 | <div><pre> |
| 25 | #include <<a href="../headers/control/if.html">boost/preprocessor/control/if.hpp</a>> |
| 26 | #include <<a href="../headers/facilities/empty.html">boost/preprocessor/facilities/empty.hpp</a>> |
| 27 | #include <<a href="../headers/punctuation/comma.html">boost/preprocessor/punctuation/comma.hpp</a>> |
| 28 | |
| 29 | <a href="if.html">BOOST_PP_IF</a>(1, <a href="comma.html">BOOST_PP_COMMA</a>, <a href="empty.html">BOOST_PP_EMPTY</a>)() // expands to , |
| 30 | </pre></div> |
| 31 | <hr size="1"> |
| 32 | <div style="margin-left: 0px;"> |
| 33 | <i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> |
| 34 | </br><i>© Copyright Paul Mensonides 2002</i> |
| 35 | </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> or |
| 39 | copy at <a href= |
| 40 | "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> |
| 41 | </div> |
| 42 | </body> |
| 43 | </html> |