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<html>
<head>
<title>BOOST_PP_ITERATION_DEPTH</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
</head>
<body>
<div style="margin-left: 0px;">
The <b>BOOST_PP_ITERATION_DEPTH</b> macro expands to the current <i>file-iteration</i> depth.
</div>
<h4>Usage</h4>
<div class="code">
<b>BOOST_PP_ITERATION_DEPTH</b>()
</div>
<h4>Remarks</h4>
<div>
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>.
</div>
<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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<i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
</br><i>© Copyright Paul Mensonides 2002</i>
</div>
<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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