Library/boost/libs/preprocessor/doc/ref/cat.html - main - BirdLeon/ROBLOX2016

Library/boost/libs/preprocessor/doc/ref/cat.html

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19 дек 2024, 19:11

19 дек 2024, 19:1105db15d

<html>
<head>
	<title>BOOST_PP_CAT</title>
	<link rel="stylesheet" type="text/css" href="../styles.css">
</head>
<body>
	<div style="margin-left:  0px;">
		The <b>BOOST_PP_CAT</b> macro concatenates its arguments after they have been expanded.
	</div>
	<h4>Usage</h4>
		<div class="code">
			<b>BOOST_PP_CAT</b>(<i>a</i>, <i>b</i>)
		</div>
	<h4>Arguments</h4>
		<dl>
			<dt>a</dt>
			<dd>
				The left operand of the concatenation.
			</dd>
			<dt>b</dt>
			<dd>
				The right operand of the concatenation.
			</dd>
		</dl>
	<h4>Remarks</h4>
		<div>
			The preprocessor token-pasting operator (<b>##</b>) prevents arguments from expanding.&nbsp;
			This macro allows its arguments to expand before concatenation.
		</div>
		<div>
			Concatenation must not result in an invocation of a macro that uses <b>BOOST_PP_CAT</b>.&nbsp;
			If that happens, <b>BOOST_PP_CAT</b> will not expand the second time.
		</div>
<!-- <h4>See Also</h4> -->
	<h4>Requirements</h4>
		<div>
			<b>Header:</b> &nbsp;<a href="../headers/cat.html">&lt;boost/preprocessor/cat.hpp&gt;</a>
		</div>
	<h4>Sample Code</h4>
<div><pre>
#include &lt;<a href="../headers/cat.html">boost/preprocessor/cat.hpp</a>&gt;

<a href="cat.html">BOOST_PP_CAT</a>(x, <a href="cat.html">BOOST_PP_CAT</a>(y, z)) // expands to xyz
</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</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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</html>