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- <title>BOOST_PP_ITERATION_DEPTH</title>
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- The <b>BOOST_PP_ITERATION_DEPTH</b> macro expands to the current <i>file-iteration</i> depth.
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- <h4>Usage</h4>
- <div class="code">
- <b>BOOST_PP_ITERATION_DEPTH</b>()
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- <h4>Remarks</h4>
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- If a <i>file-iteration</i> is not in progress, this macro expands to <i>0</i>.
- Otherwise, it expands to the current depth of <i>file-iteration</i>.
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- <h4>See Also</h4>
- <ul>
- <li><a href="frame_iteration.html">BOOST_PP_FRAME_ITERATION</a></li>
- <li><a href="relative_iteration.html">BOOST_PP_RELATIVE_ITERATION</a></li>
- </ul>
- <h4>Requirements</h4>
- <div>
- <b>Header:</b> <a href="../headers/iteration/iterate.html"><boost/preprocessor/iteration/iterate.hpp></a>
- </div>
- <h4>Sample Code</h4>
- <div><pre>
- // file.h
- #if !<a href="is_iterating.html">BOOST_PP_IS_ITERATING</a>
- #ifndef FILE_H_
- #define FILE_H_
- #include <<a href="../headers/iteration/iterate.html">boost/preprocessor/iteration/iterate.hpp</a>>
- #define <a href="iteration_params_x.html">BOOST_PP_ITERATION_PARAMS_1</a> (3, (1, 3, "file.h"))
- #include <a href="iterate.html">BOOST_PP_ITERATE</a>()
- #endif
- #elif <a href="iteration_depth.html">BOOST_PP_ITERATION_DEPTH</a>() == 1
- + depth <a href="iteration_depth.html">BOOST_PP_ITERATION_DEPTH</a>()
- // ...
- #define <a href="iteration_params_x.html">BOOST_PP_ITERATION_PARAMS_2</a> \
- (3, (1, <a href="iteration.html">BOOST_PP_ITERATION</a>(), "file.h")) \
- /**/
- #include <a href="iterate.html">BOOST_PP_ITERATE</a>()
- #elif <a href="iteration_depth.html">BOOST_PP_ITERATION_DEPTH</a>() == 2
- - depth <a href="iteration_depth.html">BOOST_PP_ITERATION_DEPTH</a>()
- // ...
- #endif
- </pre></div>
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- <div style="margin-left: 0px;">
- <i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
- </br><i>© Copyright Paul Mensonides 2002</i>
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- <div style="margin-left: 0px;">
- <p><small>Distributed under the Boost Software License, Version 1.0. (See
- accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
- copy at <a href=
- "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
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