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    <title>BOOST_PP_TUPLE_ELEM</title>
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	<div style="margin-left: 0px;">
		The <b>BOOST_PP_TUPLE_ELEM</b> macro extracts an element from a <i>tuple</i>.
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	<h4>Usage</h4>
		<div class="code">
			<b>BOOST_PP_TUPLE_ELEM</b>(<i>size</i>, <i>i</i>, <i>tuple</i>)<sup></sup><br>
<br>
or<br>
<br>
<b>BOOST_PP_TUPLE_ELEM</b>(<i>...</i>) <a href="../topics/variadic_macros.html#VNotation" target="_self"><sup>(v)</sup></a><b></b><br>
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	<h4>Arguments</h4>
		<dl>
			<dt>size</dt>
			<dd>
				The size of the <i>tuple</i>.&nbsp;
				Valid <i>tuple</i> sizes range from <i>1</i> to <b>BOOST_PP_LIMIT_TUPLE</b>.&nbsp;
			</dd>
			<dt>i</dt>
			<dd>
				The zero-based index into the <i>tuple</i> of the element to be extracted.&nbsp;
				Valid values range from <i>0</i> to <i>size</i> - <i>1</i>.
			</dd>
			<dt>tuple</dt>
			<dd>
				The <i>tuple</i> from which an element is to be extracted.
			</dd>
		</dl>
	<h4>Remarks</h4>
		<div>
			The <i>size</i> argument must be the actual size of the <i>tuple</i>,
			and <i>i</i> must be less than the size of the <i>tuple</i>. <br>
            <br>You can
            invoke the variadic version as BOOST_PP_TUPLE_ELEM(<i>i</i>,<i>tuple</i>) or
            BOOST_PP_TUPLE_ELEM(<i>size</i>,<i>i</i>,<i>tuple</i>). 
		</div>
	<h4>See Also</h4>
		<ul>
			<li><a href="limit_tuple.html">BOOST_PP_LIMIT_TUPLE</a></li>
		</ul>
	<h4>Requirements</h4>
		<div>
			<b>Header:</b> &nbsp;<a href="../headers/tuple/elem.html">&lt;boost/preprocessor/tuple/elem.hpp&gt;</a>
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	<h4>Sample Code</h4>
<div><pre>#include &lt;<a href="../headers/tuple/elem.html">boost/preprocessor/tuple/elem.hpp</a>&gt;<br><br>#define TUPLE (a, b, c, d)<br><br><a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(4, 0, TUPLE) // expands to a<br><a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(4, 3, TUPLE) // expands to d<br><br>// or for the variadic version <a href="../topics/variadic_macros.html#VNotation" target="_self"><sup>(v)</sup></a><br><br><a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(0, TUPLE) // expands to a in the variadic version<br><a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(3, TUPLE) // expands to d in the variadic version<br></pre></div>
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		<i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
		<br><i>© Copyright Paul Mensonides 2002<br>
        </i><i>© Copyright Edward Diener 2011,2013</i><br>
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	<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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