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[SVN r15198]
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Paul Mensonides
2002-09-08 09:40:56 +00:00
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<html>
<head>
<title>BOOST_PP_LOCAL_LIMITS</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_LOCAL_LIMITS</b> macro is a user-defined <i>named external argument</i> used by <b>BOOST_PP_LOCAL_ITERATE</b>.
</div>
<h4>Usage</h4>
<div class="code">
#define <b>BOOST_PP_LOCAL_LIMITS</b> (<i>start</i>, <i>finish</i>)
</div>
<h4>Arguments</h4>
<dl>
<dt>start</dt>
<dd>
The lower bound (inclusive) of a <i>local iteration</i>.&nbsp;
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_ITERATION</b>.
</dd>
<dt>finish</dt>
<dd>
The upper bound (inclusive) of a <i>local iteration</i>.&nbsp;
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_ITERATION</b>.
</dd>
</dl>
<h4>Remarks</h4>
<div>
Note that there is a whitespace character after the macro identifier.
</div>
<div>
This macro must expand to a <i>2</i>-element <i>tuple</i>.&nbsp;
The elements of this <i>tuple</i> represent the lower and upper boundaries of a <i>local iteration</i>.&nbsp;
Both <i>start</i> and <i>finish</i> are <i>evaluated parameters</i>.&nbsp;
This implies that they can include simple arithmetic expressions (such as <i>1</i> + <i>3</i>), etc..
</div>
<div>
This macro is automatically undefined for reuse by a call to <b>BOOST_PP_LOCAL_ITERATE</b>.
</div>
<h4>See Also</h4>
<ul>
<li><a href="limit_iteration.html">BOOST_PP_LIMIT_ITERATION</a></li>
<li><a href="local_iterate.html">BOOST_PP_LOCAL_ITERATE</a></li>
</ul>
<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/iteration/local.hpp&gt;
template&lt;int&gt; struct sample;
#define BOOST_PP_LOCAL_MACRO(n) /* ... */ \
template&lt;&gt; struct sample&lt;n&gt; { \
enum { value = n }; \
}; \
/**/
#define BOOST_PP_LOCAL_LIMITS (1, 5)
#include BOOST_PP_LOCAL_ITERATE()
/* expands to...
template&lt;&gt; struct sample&lt;1&gt; { enum { value = 1 }; };
template&lt;&gt; struct sample&lt;2&gt; { enum { value = 2 }; };
template&lt;&gt; struct sample&lt;3&gt; { enum { value = 3 }; };
template&lt;&gt; struct sample&lt;4&gt; { enum { value = 4 }; };
template&lt;&gt; struct sample&lt;5&gt; { enum { value = 5 }; };
*/
<pre></div>
</body>
</html>