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1 | <html> |
| 2 | <head> | |
| 3 | <title>BOOST_PP_ENUM_PARAMS_WITH_DEFAULTS</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_ENUM_PARAMS_WITH_DEFAULTS</b> macro generates a comma-separated list of parameters with default arguments. | |
| 9 | </div> | |
| 10 | <h4>Usage</h4> | |
| 11 | <div class="code"> | |
| 12 | <b>BOOST_PP_ENUM_PARAMS_WITH_DEFAULTS</b>(<i>count</i>, <i>param</i>, <i>def</i>) | |
| 13 | </div> | |
| 14 | <h4>Arguments</h4> | |
| 15 | <dl> | |
| 16 | <dt>count</dt> | |
| 17 | <dd> | |
| 18 | The number of parameters to generate. | |
| 19 | Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_REPEAT</b>. | |
| 20 | </dd> | |
| 21 | <dt>param</dt> | |
| 22 | <dd> | |
| 23 | The text of the parameter. | |
| 24 | <b>BOOST_PP_ENUM_PARAMS_WITH_DEFAULTS</b> concatenates numbers ranging from <i>0</i> to <i>count</i> - <i>1</i> | |
| 25 | to generate parameters. | |
| 26 | </dd> | |
| 27 | <dt>def</dt> | |
| 28 | <dd> | |
| 29 | The default value that trails each parameter. | |
| 30 | <b>BOOST_PP_ENUM_PARAMS_WITH_DEFAULTS</b> concatenates numbers ranging from <i>0</i> to <i>count</i> - <i>1</i> | |
| 31 | to generate default arguments. | |
| 32 | </dd> | |
| 33 | </dl> | |
| 34 | <h4>Remarks</h4> | |
| 35 | <div> | |
| 36 | This macro expands to the comma-separated sequence: | |
| 37 | <div> | |
| 38 | <i>param</i> ## <i>0</i> = <i>def</i> ## <i>0</i>, <i>param</i> ## <i>1</i> = <i>def</i> ## <i>1</i>, ... <i>param</i> ## <i>count</i> - <i>1</i> = <i>def</i> ## <i>count</i> - <i>1</i> | |
| 39 | </div> | |
| 40 | </div> | |
| 41 | <div> | |
| 42 | Previously, this macro could not be used recursively inside <b>BOOST_PP_REPEAT</b>. | |
| 43 | This limitation no longer exists, as the library can automatically detect the next available repetition depth. | |
| 44 | </div> | |
| 45 | <div> | |
| 46 | This macro is deprecated. | |
| 47 | It only exists for backward compatibility. | |
| 48 | Use <b>BOOST_PP_ENUM_BINARY_PARAMS</b> instead: | |
| 49 | <div> | |
| 50 | <b>BOOST_PP_ENUM_BINARY_PARAMS</b>(<i>count</i>, <i>param</i>, = <i>def</i>) | |
| 51 | </div> | |
| 52 | </div> | |
| 53 | <h4>See Also</h4> | |
| 54 | <ul> | |
| 55 | <li><a href="enum_binary_params.html">BOOST_PP_ENUM_BINARY_PARAMS</a></li> | |
| 56 | <li><a href="limit_repeat.html">BOOST_PP_LIMIT_REPEAT</a></li> | |
| 57 | </ul> | |
| 58 | <h4>Requirements</h4> | |
| 59 | <div> | |
| 60 | <b>Header:</b> <a href="../headers/repetition/epwd.html"><boost/preprocessor/repetition/enum_params_with_defaults.hpp></a> | |
| 61 | </div> | |
| 62 | <h4>Sample Code</h4> | |
| 63 | <div><pre> | |
| 64 | #include <<a href="../headers/repetition/epwd.html">boost/preprocessor/repetition/enum_params_with_defaults.hpp</a>> | |
| 65 | ||
| 66 | <a href="enum_params_with_defaults.html">BOOST_PP_ENUM_PARAMS_WITH_DEFAULTS</a>(3, class T, U) | |
| 67 | // expands to class T0 = U0, class T1 = U1, class T2 = U2 | |
| 68 | ||
| 69 | <a href="enum_binary_params.html">BOOST_PP_ENUM_BINARY_PARAMS</a>(3, class T, = U) | |
| 70 | // expands to class T0 = U0, class T1 = U1, class T2 = U2 | |
| 71 | </pre></div> | |
| 72 | <hr size="1"> | |
| 73 | <div style="margin-left: 0px;"> | |
| 74 |