projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | <html> |
| 2 | <head> | |
| 3 | <title>BOOST_PP_LIST_SIZE_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_LIST_SIZE_D</b> macro expands to the size of a <i>list</i>. | |
| 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_LIST_SIZE_D</b>(<i>d</i>, <i>list</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>list</dt> | |
| 22 | <dd> | |
| 23 | A <i>list</i> whose size is to be calculated. | |
| 24 | </dd> | |
| 25 | </dl> | |
| 26 | <h4>See Also</h4> | |
| 27 | <ul> | |
| 28 | <li><a href="list_size.html">BOOST_PP_LIST_SIZE</a></li> | |
| 29 | </ul> | |
| 30 | <h4>Requirements</h4> | |
| 31 | <div> | |
| 32 | <b>Header:</b> <a href="../headers/list/size.html"><boost/preprocessor/list/size.hpp></a> | |
| 33 | </div> | |
| 34 | <h4>Sample Code</h4> | |
| 35 | <div><pre> | |
| 36 | #include <<a href="../headers/arithmetic/add.html">boost/preprocessor/arithmetic/add.hpp</a>> | |
| 37 | #include <<a href="../headers/list/fold_left.html">boost/preprocessor/list/fold_left.hpp</a>> | |
| 38 | #include <<a href="../headers/list/size.html">boost/preprocessor/list/size.hpp</a>> | |
| 39 | ||
| 40 | #define L1 (a, (b, (c, <a href="nil.html">BOOST_PP_NIL</a>))) | |
| 41 | #define L2 (x, (y, <a href="nil.html">BOOST_PP_NIL</a>)) | |
| 42 | #define L3 (p, (q, <a href="nil.html">BOOST_PP_NIL</a>)) | |
| 43 | ||
| 44 | #define LIST (L1, (L2, (L3, <a href="nil.html">BOOST_PP_NIL</a>))) | |
| 45 | ||
| 46 | #define OP(d, state, x) \ | |
| 47 | <a href="add_d.html">BOOST_PP_ADD_D</a>( \ | |
| 48 | d, state, \ | |
| 49 | <a href="list_size_d.html">BOOST_PP_LIST_SIZE_D</a>(d, x) \ | |
| 50 | ) \ | |
| 51 | /**/ | |
| 52 | ||
| 53 | <a href="list_fold_left.html">BOOST_PP_LIST_FOLD_LEFT</a>(OP, 0, LIST) // expands to 7 | |
| 54 | </pre></div> | |
| 55 | <hr size="1"> | |
| 56 | <div style="margin-left: 0px;"> | |
| 57 |