forked from boostorg/preprocessor
64 lines
1.3 KiB
HTML
64 lines
1.3 KiB
HTML
<html>
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<head>
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<title>BOOST_PP_SEQ_FIRST_N</title>
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<link rel="stylesheet" type="text/css" href="../styles.css">
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</head>
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<body>
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<div style="margin-left: 0px;">
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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>
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elements of a <i>seq</i>.
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</div>
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<h4>
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Usage
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</h4>
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<div class="code">
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<b>BOOST_PP_SEQ_FIRST_N</b>(<i>n</i>, <i>list</i>)
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</div>
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<h4>
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Arguments
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</h4>
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<dl>
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<dt>n</dt>
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<dd>
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The number of elements to extract.
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</dd>
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<dt>list</dt>
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<dd>
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The <i>seq</i> from which the elements are extracted.
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</dd>
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</dl>
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<h4>
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Remarks
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</h4>
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<div>
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This macro extracts <i>n</i> elements from the beginning of <i>seq</i> and
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returns them as a new <i>seq</i>
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</div>
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<h4>
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See Also
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</h4>
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<ul>
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<li>
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<a href="seq_rest_n.html">BOOST_PP_SEQ_REST_N</a></li>
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</ul>
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<h4>
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Requirements
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</h4>
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<div>
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<b>Header:</b> <a href="../headers/seq/first_n.hpp.html"><boost/preprocessor/seq/first_n.hpp></a>
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</div>
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<h4>
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Sample Code
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</h4>
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<div>
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<pre>
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#include <<a href="../headers/seq/first_n.hpp.html">boost/preprocessor/seq/first_n.hpp</a>>
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#define SEQ (a)(b)(c)(d)(e)
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<a href="seq_first_n.html">BOOST_PP_SEQ_FIRST_N</a>(2, SEQ) // expands to (a)(b)
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</pre>
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</div>
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</body>
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</html>
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