projects / ceph.git / blame
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1 | <html> |
| 2 | <head> | |
| 3 | <title>BOOST_PP_REPEAT_FROM_TO_D</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_REPEAT_FROM_TO_D</b> macro represents a fast horizontal repetition construct. | |
| 9 | It reenters <b>BOOST_PP_WHILE</b> with maximum efficiency. | |
| 10 | </div> | |
| 11 | <h4>Usage</h4> | |
| 12 | <div class="code"> | |
| 13 | <b>BOOST_PP_REPEAT_FROM_TO_D</b>(<i>d</i>, <i>first</i>, <i>last</i>, <i>macro</i>, <i>data</i>) | |
| 14 | </div> | |
| 15 | <h4>Arguments</h4> | |
| 16 | <dl> | |
| 17 | <dt>d</dt> | |
| 18 | <dd> | |
| 19 | The next available <b>BOOST_PP_WHILE</b> iteration. | |
| 20 | </dd> | |
| 21 | <dt>first</dt> | |
| 22 | <dd> | |
| 23 | The lower bound of the repetition. | |
| 24 | Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>. | |
| 25 | </dd> | |
| 26 | <dt>last</dt> | |
| 27 | <dd> | |
| 28 | The upper bound of the repetition. | |
| 29 | Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>. | |
| 30 | </dd> | |
| 31 | <dt>macro</dt> | |
| 32 | <dd> | |
| 33 | A ternary operation of the form <i>macro</i>(<i>z</i>, <i>n</i>, <i>data</i>). | |
| 34 | This macro is expanded by <b>BOOST_PP_REPEAT</b> with the next available repetition depth, | |
| 35 | the current repetition number, and the auxiliary <i>data</i> argument. | |
| 36 | </dd> | |
| 37 | <dt>data</dt> | |
| 38 | <dd> | |
| 39 | Auxiliary data passed to <i>macro</i>. | |
| 40 | </dd> | |
| 41 | </dl> | |
| 42 | <h4>Remarks</h4> | |
| 43 | <div> | |
| 44 | This macro expands to the sequence: | |
| 45 | <div> | |
| 46 | <i>macro</i>(<i>z</i>, <i>first</i>, <i>data</i>) <i>macro</i>(<i>z</i>, <i>first</i> + <i>1</i>, <i>data</i>) ... <i>macro</i>(<i>z</i>, <i>last</i> - <i>1</i>, <i>data</i>) | |
| 47 | </div> | |
| 48 | </div> | |
| 49 | <div> | |
| 50 | The number of repetitions (i.e. <i>last</i> - <i>first</i>) must not exceed <b>BOOST_PP_LIMIT_REPEAT</b>. | |
| 51 | </div> | |
| 52 | <div> | |
| 53 | The <i>z</i> value that is passed to <i>macro</i> represents the next available repetition dimension. | |
| 54 | 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>. | |
| 55 | 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. | |
| 56 | </div> | |
| 57 | <div> | |
| 58 | To directly use this <i>z</i> value, rather than simply passing it to another macro, see <b>BOOST_PP_REPEAT_FROM_TO_D_<i>z</i></b>. | |
| 59 | </div> | |
| 60 | <h4>See Also</h4> | |
| 61 | <ul> | |
| 62 | <li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li> | |
| 63 | <li><a href="limit_repeat.html">BOOST_PP_LIMIT_REPEAT</a></li> | |
| 64 | <li><a href="repeat_from_to.html">BOOST_PP_REPEAT_FROM_TO</a></li> | |
| 65 | <li><a href="repeat_from_to_d_z.html">BOOST_PP_REPEAT_FROM_TO_D_<i>z</i></a></li> | |
| 66 | </ul> | |
| 67 | <h4>Requirements</h4> | |
| 68 | <div> | |
| 69 | <b>Header:</b> <a href="../headers/repetition/repeat_from_to.html"><boost/preprocessor/repetition/repeat_from_to.hpp></a> | |
| 70 | </div> | |
| 71 | <hr size="1"> | |
| 72 | <div style="margin-left: 0px;"> | |
| 73 |