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| <title>BOOST_PP_VARIADIC_ELEM</title> |
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| <div style="margin-left: 0px;"> The <b>BOOST_PP_VARIADIC_ELEM</b> variadic macro |
| extracts an element from <i>variadic data</i>. </div> |
| <h4>Usage</h4> |
| <div class="code"> <b>BOOST_PP_VARIADIC_ELEM</b>(<i>i</i>, <i>...</i>) <a href="../topics/variadic_macros.html#VNotation" target="_self"><sup>(v)</sup></a><br> |
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| <h4>Arguments</h4> |
| <dl><dt>i</dt> |
| <dd> The zero-based index into the <i>variadic data</i> of the element to be |
| extracted. Valid values range from <i>0</i> to the size of the variadic data - 1. |
| </dd> |
| <dt>...<br> |
| </dt> |
| <dd> The <i>variadic data</i> from which an element is to be extracted. </dd> |
| </dl> |
| <h4>Remarks</h4> |
| <div>The index <i>i</i> must be less than the size of the <i>variadic data</i>. </div> |
| <h4>See Also</h4> |
| <ul> |
| <li><a href="limit_variadic.html">BOOST_PP_LIMIT_VARIADIC</a></li> |
| </ul> |
| <h4>Requirements</h4> |
| <div> <b>Header:</b> <a href="../headers/variadic/elem.html"><boost/preprocessor/variadic/elem.hpp></a> |
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| <h4>Sample Code</h4> |
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| <pre>#include <<a href="../headers/variadic/elem.html">boost/preprocessor/variadic/elem.hpp</a>><br><br>#define VAR_DATA a, b, c, d<br><br><a href="variadic_elem.html">BOOST_PP_VARIADIC_ELEM</a>(0, VAR_DATA) // expands to a<br><a href="variadic_elem.html">BOOST_PP_VARIADIC_ELEM</a>(3, VAR_DATA) // expands to d<br></pre> |
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| <div style="margin-left: 0px;"> <i></i><i>© Copyright Edward Diener 2011,2013</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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