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Boost library as in https://sourceforge.net/projects/boost/files/boost/1.57.0/

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<html> <head> <title>BOOST_PP_ITERATE</title> <link rel="stylesheet" type="text/css" href="../styles.css"> </head> <body> <div style="margin-left: 0px;"> The <b>BOOST_PP_ITERATE</b> macro initiates a <i>file-iteration</i>. </div> <h4>Usage</h4> <div class="code"> #include <b>BOOST_PP_ITERATE</b>() </div> <h4>Remarks</h4> <div> Arguments to this macro are passed as <i>external named arguments</i> in one of two ways--either through <b>BOOST_PP_FILENAME_<i>x</i></b> and <b>BOOST_PP_ITERATION_LIMITS</b> <i>or</i> through <b>BOOST_PP_ITERATION_PARAMS_<i>x</i></b>.&nbsp; </div> <div> Three pieces of information are required to perform a <i>file-iteration</i>.&nbsp; First, the name of a file to iterate over.&nbsp; This is passed via <b>BOOST_PP_FILENAME_<i>x</i></b> <i>or</i> as part of <b>BOOST_PP_ITERATION_PARAMS_<i>x</i></b>.&nbsp; The <i>file-iteration</i> mechanism will repeatedly include this file with iteration values ranging from a lower bound to an upper bound--the second and third <i>required</i> parameters.&nbsp; These two boundaries are either passed through <b>BOOST_PP_ITERATION_LIMITS</b> <i>or</i> as part of <b>BOOST_PP_ITERATION_PARAMS_<i>x</i></b>. </div> <div> Optionally, a fourth parameter may be passed that associates flags with an iteration.&nbsp; These flags are primarily useful to distinguish one iteration from another in the same file.&nbsp; This parameter can only be passed through <b>BOOST_PP_ITERATION_PARAMS_<i>x</i></b>. </div> <div> While a <i>file-iteration</i> is in progress, <b>BOOST_PP_IS_ITERATING</b> is defined as <i>1</i>. </div> <h4>See Also</h4> <ul> <li><a href="filename_x.html">BOOST_PP_FILENAME_<i>x</i></a></li> <li><a href="is_iterating.html">BOOST_PP_IS_ITERATING</a></li> <li><a href="iteration_limits.html">BOOST_PP_ITERATION_LIMITS</a></li> <li><a href="iteration_params_x.html">BOOST_PP_ITERATION_PARAMS_<i>x</i></a></li> </ul> <h4>Requirements</h4> <div> <b>Header:</b> &nbsp;<a href="../headers/iteration/iterate.html">&lt;boost/preprocessor/iteration/iterate.hpp&gt;</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 &lt;<a href="../headers/iteration/iterate.html">boost/preprocessor/iteration/iterate.hpp</a>&gt; #define <a href="iteration_params_x.html">BOOST_PP_ITERATION_PARAMS_1</a> (3, (1, 10, "file.h")) #include <a href="iterate.html">BOOST_PP_ITERATE</a>() #define <a href="filename_x.html">BOOST_PP_FILENAME_1</a> "file.h" #define <a href="iteration_limits.html">BOOST_PP_ITERATION_LIMITS</a> (11, 20) #include <a href="iterate.html">BOOST_PP_ITERATE</a>() #endif #else current iteration value is <a href="iteration.html">BOOST_PP_ITERATION</a>() #endif </pre></div> <hr size="1"> <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> </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> </div> </body> </html>