projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | <html> |
| 2 | <head> | |
| 3 | <title>BOOST_PP_INTERCEPT</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_INTERCEPT</b> macro intercepts a numeric concatenation and expands to nothing. | |
| 9 | </div> | |
| 10 | <h4>Usage</h4> | |
| 11 | <div class="code"> | |
| 12 | <b>BOOST_PP_INTERCEPT</b> | |
| 13 | </div> | |
| 14 | <h4>Remarks</h4> | |
| 15 | <div> | |
| 16 | This macro is used to intercept concatenations performed by various other library constructs. | |
| 17 | It is typically used after other text to prevent eat the concatenation expand to nothing. | |
| 18 | This macro can only intercept integer constants in the range of <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>. | |
| 19 | </div> | |
| 20 | <h4>See Also</h4> | |
| 21 | <ul> | |
| 22 | <li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li> | |
| 23 | </ul> | |
| 24 | <h4>Requirements</h4> | |
| 25 | <div> | |
| 26 | <b>Header:</b> <a href="../headers/facilities/intercept.html"><boost/preprocessor/facilities/intercept.hpp></a> | |
| 27 | </div> | |
| 28 | <h4>Sample Code</h4> | |
| 29 | <div><pre> | |
| 30 | #include <<a href="../headers/facilities/intercept.html">boost/preprocessor/facilities/intercept.hpp</a>> | |
| 31 | #include <<a href="../headers/repetition/enum_binary_params.html">boost/preprocessor/repetition/enum_binary_params.hpp</a>> | |
| 32 | ||
| 33 | <a href="enum_binary_params.html">BOOST_PP_ENUM_BINARY_PARAMS</a>(3, class T, = U) | |
| 34 | // expands to class T0 = U0, class T1 = U1, class T2 = U2 | |
| 35 | ||
| 36 | <a href="enum_binary_params.html">BOOST_PP_ENUM_BINARY_PARAMS</a>(3, class T, = int <a href="intercept.html">BOOST_PP_INTERCEPT</a>) | |
| 37 | // expands to class T0 = int, class T1 = int, class T2 = int | |
| 38 | </pre></div> | |
| 39 | <hr size="1"> | |
| 40 | <div style="margin-left: 0px;"> | |
| 41 |