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boost_preprocessor/docs.1/ref/iteration_flags.html

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<html>
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<title>BOOST_PP_ITERATION_FLAGS</title>
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<script language="javascript" type="text/javascript" src="../scripts.js"></script>
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<body onload="init('sample');">
<div style="margin-left: 0px;">
The <b>BOOST_PP_ITERATION_FLAGS</b> macro retrieves flags associated with the current <i>file-iteration</i> depth.
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<h4>Usage</h4>
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<b>BOOST_PP_ITERATION_FLAGS</b>()
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<h4>Remarks</h4>
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This macro is only valid when a <i>file-iteration</i> is in progress.
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<h4>Requirements</h4>
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<b>Header:</b> &nbsp;<a href="../headers/iteration/iterate.hpp.html">&lt;boost/preprocessor/iteration/iterate.hpp&gt;</a>
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<h4><a class="local" onclick="toggle('sample');" onmouseover="change(this);" onmouseout="revert(this);">Sample Code</a></h4>
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// file.h
#if !BOOST_PP_IS_ITERATING
#ifndef FILE_H_
#define FILE_H_
#include &lt;boost/preprocessor/iteration/iterate.hpp&gt;
// 1st iteration:
#define BOOST_PP_ITERATION_PARAMS_1 (4, (1, 10, "file.h", 0x0001))
#include BOOST_PP_ITERATE()
// 2nd iteration:
#define BOOST_PP_ITERATION_PARAMS_1 (4, (1, 10, "file.h", 0x0002))
#include BOOST_PP_ITERATE()
#endif
#elif BOOST_PP_ITERATION_DEPTH() == 1 /* ... */ \
&& BOOST_PP_ITERATION_FLAGS() == 0x0001 \
/**/
{ 1st }
#elif BOOST_PP_ITERATION_DEPTH() == 1 /* ... */ \
&& BOOST_PP_ITERATION_FLAGS() == 0x0002 \
/**/
{ 2nd }
#endif
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