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Paul Mensonides
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<html>
<head>
<title>BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
<script language="javascript" type="text/javascript" src="../scripts.js"></script>
</head>
<body onload="init('sample');">
<div style="margin-left: 0px;">
The <b>BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT</b> macro generates a comma-separated list of parameters with a default argument.
</div>
<h4>Usage</h4>
<div class="code">
<b>BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT</b>(<i>count</i>, <i>param</i>, <i>def</i>)
</div>
<h4>Arguments</h4>
<dl>
<dt>count</dt>
<dd>
The number of parameters to generate.&nbsp;
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_REPEAT</b>.
</dd>
<dt>param</dt>
<dd>
The text of the parameter.&nbsp;
<b>BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT</b> concatenates numbers ranging from <i>0</i> to <i>count</i> - <i>1</i>
to generate parameters.
</dd>
<dt>def</dt>
<dd>
The default value that trails each parameter.
</dd>
</dl>
<h4>Remarks</h4>
<div>
This macro expands to the comma-separated sequence:
<div>
<i>param</i> ## <i>0</i> = <i>def</i>, <i>param</i> ## <i>1</i> = <i>def</i>, ... <i>param</i> ## <i>count</i> - <i>1</i> = <i>def</i>
</div>
</div>
<div>
Previously, this macro could not be used recursively inside <b>BOOST_PP_REPEAT</b>.&nbsp;
This limitation no longer exists, as the library can automatically detect the next available repetition depth.
</div>
<div>
This macro is deprecated.&nbsp;
It only exists for backward compatibility.&nbsp;
Use <b>BOOST_PP_ENUM_BINARY_PARAMS</b> with <b>BOOST_PP_INTERCEPT</b> instead:
<div>
<b>BOOST_PP_ENUM_BINARY_PARAMS</b>(<i>count</i>, <i>param</i>, = <i>def</i> <b>BOOST_PP_INTERCEPT</b>)
</div>
</div>
<h4>See Also</h4>
<ul>
<li><a href="enum_binary_params.html">BOOST_PP_ENUM_BINARY_PARAMS</a></li>
<li><a href="intercept.html">BOOST_PP_INTERCEPT</a></li>
<li><a href="limit_repeat.html">BOOST_PP_LIMIT_REPEAT</a></li>
</ul>
<h4>Requirements</h4>
<div>
<b>Header:</b> &nbsp;<a href="../headers/repetition/enum_params_with_a_default.hpp.html">&lt;boost/preprocessor/repetition/enum_params_with_a_default.hpp&gt;</a>
</div>
<h4><a class="local" onclick="toggle('sample');" onmouseover="change(this);" onmouseout="revert(this);">Sample Code</a></h4>
<div id="sample"><pre>
#include &lt;boost/preprocessor/repetition/enum_params_with_a_default.hpp&gt;
BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(3, class T, int)
// expands to T0 = int, T1 = int, T2 = int
BOOST_PP_ENUM_BINARY_PARAMS(3, class T, = int BOOST_PP_INTERCEPT)
// expands to T0 = int, T1 = int, T2 = int
<pre></div>
</body>
</html>