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<title>BOOST_PP_SEQ_FIRST_N</title>
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The <b>BOOST_PP_SEQ_FIRST_N</b> macro expands to a <i>seq</i> of the first <i>n</i>
elements of a <i>seq</i>.
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<h4>
Usage
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<div class="code">
<b>BOOST_PP_SEQ_FIRST_N</b>(<i>n</i>, <i>seq</i>)
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Arguments
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<dl>
<dt>n</dt>
<dd>
The number of elements to extract.
</dd>
<dt>seq</dt>
<dd>
The <i>seq</i> from which the elements are extracted.
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Remarks
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This macro extracts <i>n</i> elements from the beginning of <i>seq</i> and
returns them as a new <i>seq</i>
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<h4>
See Also
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<ul>
<li>
<a href="seq_rest_n.html">BOOST_PP_SEQ_REST_N</a></li>
</ul>
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Requirements
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<b>Header:</b> <a href="../headers/seq/first_n.html"><boost/preprocessor/seq/first_n.hpp></a>
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Sample Code
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<pre>#include <<a href="../headers/seq/first_n.html">boost/preprocessor/seq/first_n.hpp</a>><br><br>#define SEQ (a)(b)(c)(d)(e)<br><br><a href="seq_first_n.html">BOOST_PP_SEQ_FIRST_N</a>(2, SEQ) // expands to (a)(b)<br></pre>
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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</i>
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<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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Version data entries
10 entries across 10 versions & 1 rubygems