1<html> 2<head> 3 <title>BOOST_PP_ITERATION_DEPTH</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_ITERATION_DEPTH</b> macro expands to the current <i>file-iteration</i> depth. 9 </div> 10 <h4>Usage</h4> 11 <div class="code"> 12 <b>BOOST_PP_ITERATION_DEPTH</b>() 13 </div> 14 <h4>Remarks</h4> 15 <div> 16 If a <i>file-iteration</i> is not in progress, this macro expands to <i>0</i>. 17 Otherwise, it expands to the current depth of <i>file-iteration</i>. 18 </div> 19 <h4>See Also</h4> 20 <ul> 21 <li><a href="frame_iteration.html">BOOST_PP_FRAME_ITERATION</a></li> 22 <li><a href="relative_iteration.html">BOOST_PP_RELATIVE_ITERATION</a></li> 23 </ul> 24 <h4>Requirements</h4> 25 <div> 26 <b>Header:</b> <a href="../headers/iteration/iterate.html"><boost/preprocessor/iteration/iterate.hpp></a> 27 </div> 28 <h4>Sample Code</h4> 29<div><pre> 30// file.h 31#if !<a href="is_iterating.html">BOOST_PP_IS_ITERATING</a> 32 33 #ifndef FILE_H_ 34 #define FILE_H_ 35 36 #include <<a href="../headers/iteration/iterate.html">boost/preprocessor/iteration/iterate.hpp</a>> 37 38 #define <a href="iteration_params_x.html">BOOST_PP_ITERATION_PARAMS_1</a> (3, (1, 3, "file.h")) 39 #include <a href="iterate.html">BOOST_PP_ITERATE</a>() 40 41 #endif 42 43#elif <a href="iteration_depth.html">BOOST_PP_ITERATION_DEPTH</a>() == 1 44 45 + depth <a href="iteration_depth.html">BOOST_PP_ITERATION_DEPTH</a>() 46 // ... 47 48 #define <a href="iteration_params_x.html">BOOST_PP_ITERATION_PARAMS_2</a> \ 49 (3, (1, <a href="iteration.html">BOOST_PP_ITERATION</a>(), "file.h")) \ 50 /**/ 51 52 #include <a href="iterate.html">BOOST_PP_ITERATE</a>() 53 54#elif <a href="iteration_depth.html">BOOST_PP_ITERATION_DEPTH</a>() == 2 55 56 - depth <a href="iteration_depth.html">BOOST_PP_ITERATION_DEPTH</a>() 57 // ... 58 59#endif 60</pre></div> 61 <hr size="1"> 62 <div style="margin-left: 0px;"> 63 <i>� Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> 64 </br><i>� Copyright Paul Mensonides 2002</i> 65 </div> 66 <div style="margin-left: 0px;"> 67 <p><small>Distributed under the Boost Software License, Version 1.0. (See 68 accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or 69 copy at <a href= 70 "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> 71 </div> 72</body> 73</html> 74