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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 |