| <html> |
| <head> |
| <title>BOOST_PP_ENUM_TRAILING</title> |
| <link rel="stylesheet" type="text/css" href="../styles.css"> |
| </head> |
| <body> |
| <div style="margin-left: 0px;"> |
| The <b>BOOST_PP_ENUM_TRAILING</b> macro generates a comma-separated list with a leading comma. |
| </div> |
| <h4>Usage</h4> |
| <div class="code"> |
| <b>BOOST_PP_ENUM_TRAILING</b>(<i>count</i>, <i>macro</i>, <i>data</i>) |
| </div> |
| <h4>Arguments</h4> |
| <dl> |
| <dt>count</dt> |
| <dd> |
| The number of repetitious calls to <i>macro</i>. |
| Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_REPEAT</b>. |
| </dd> |
| <dt>macro</dt> |
| <dd> |
| A ternary operation of the form <i>macro</i>(<i>z</i>, <i>n</i>, <i>data</i>). |
| This macro is expanded by <b>BOOST_PP_ENUM</b> with the next available repetition depth, |
| the current repetition number, and the auxiliary <i>data</i> argument. |
| </dd> |
| <dt>data</dt> |
| <dd> |
| Auxiliary data passed to <i>macro</i>. |
| </dd> |
| </dl> |
| <h4>Remarks</h4> |
| <div> |
| This macro expands to the comma-separated sequence: |
| <div> |
| , <i>macro</i>(<i>z</i>, <i>0</i>, <i>data</i>), <i>macro</i>(<i>z</i>, <i>1</i>, <i>data</i>), ... <i>macro</i>(<i>z</i>, <i>count</i> - <i>1</i>, <i>data</i>) |
| </div> |
| </div> |
| <div> |
| The <i>z</i> value that is passed to <i>macro</i> represents the next available repetition dimension. |
| Other macros that have <b>_Z</b> suffix variants internally use <b>BOOST_PP_REPEAT</b>--for example, <b>BOOST_PP_ENUM_PARAMS</b> and <b>BOOST_PP_ENUM_PARAMS_Z</b>. |
| Using these <b>_Z</b> versions is not strictly necessary, but passing the <i>z</i> value (that is passed to <i>macro</i>) to these macros allows them to reenter <b>BOOST_PP_REPEAT</b> with maximum efficiency. |
| </div> |
| <div> |
| To directly use this <i>z</i> value, rather than simply passing it to another macro, see <b>BOOST_PP_ENUM_TRAILING_<i>z</i></b>. |
| </div> |
| <h4>See Also</h4> |
| <ul> |
| <li><a href="enum_trailing_z.html">BOOST_PP_ENUM_TRAILING_<i>z</i></a></li> |
| <li><a href="limit_repeat.html">BOOST_PP_LIMIT_REPEAT</a></li> |
| </ul> |
| <h4>Requirements</h4> |
| <div> |
| <b>Header:</b> <a href="../headers/repetition/enum_trailing.html"><boost/preprocessor/repetition/enum_trailing.hpp></a> |
| </div> |
| <h4>Sample Code</h4> |
| <div><pre> |
| #include <<a href="../headers/repetition/enum_trailing.html">boost/preprocessor/repetition/enum_trailing.hpp</a>> |
| |
| #define TEXT(z, n, text) text |
| |
| template<class <a href="enum_trailing.html">BOOST_PP_ENUM_TRAILING</a>(3, TEXT, class)> |
| class X { }; |
| /* |
| expands to... |
| |
| template<class, class, class, class> |
| class X { }; |
| */ |
| </pre></div> |
| <hr size="1"> |
| <div style="margin-left: 0px;"> |
| <i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> |
| </br><i>© Copyright Paul Mensonides 2002</i> |
| </div> |
| <div style="margin-left: 0px;"> |
| <p><small>Distributed under the Boost Software License, Version 1.0. (See |
| accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or |
| copy at <a href= |
| "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> |
| </div> |
| </body> |
| </html> |
