69 lines
2.3 KiB
HTML
69 lines
2.3 KiB
HTML
<html>
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<head>
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<title>BOOST_PP_ADD</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_ADD</b> macro expands to the sum of its arguments.
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</div>
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<h4>Usage</h4>
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<div class="code">
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<b>BOOST_PP_ADD</b>(<i>x</i>, <i>y</i>)
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</div>
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<h4>Arguments</h4>
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<dl>
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<dt>x</dt>
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<dd>
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The first addend of the operation.
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Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
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</dd>
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<dt>y</dt>
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<dd>
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The second addend of the operation.
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Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
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</dd>
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</dl>
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<h4>Remarks</h4>
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<div>
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If the sum of <i>x</i> and <i>y</i> is greater than <b>BOOST_PP_LIMIT_MAG</b>, the result is saturated to <b>BOOST_PP_LIMIT_MAG</b>.
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</div>
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<div>
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Previously, this macro could not be used inside <b>BOOST_PP_WHILE</b>.
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There is no longer any such restriction.
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It is more efficient, however, to use <b>BOOST_PP_ADD_D</b> in such a situation.
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</div>
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<div>
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This macro is the most efficient when <i>x</i> is greater than or equal to <i>y</i>.
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However, the efficiency gain is not worth actually comparing the two arguments prior to invocation.
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In other words, <i>x</i> should be the addend that is <i>most likely</i> to be the largest of the two operands.
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</div>
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<h4>See Also</h4>
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<ul>
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<li><a href="add_d.html">BOOST_PP_ADD_D</a></li>
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<li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
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</ul>
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<h4>Requirements</h4>
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<div>
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<b>Header:</b> <a href="../headers/arithmetic/add.html"><boost/preprocessor/arithmetic/add.hpp></a>
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</div>
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<h4>Sample Code</h4>
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<div><pre>
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#include <a href="../headers/arithmetic/add.html"><boost/preprocessor/arithmetic/add.hpp></a>
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<a href="add.html">BOOST_PP_ADD</a>(4, 3) // expands to 7
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</pre></div>
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<hr size="1">
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<div style="margin-left: 0px;">
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<i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
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</br><i>© Copyright Paul Mensonides 2002</i>
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</div>
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<div style="margin-left: 0px;">
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<p><small>Distributed under the Boost Software License, Version 1.0. (See
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accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
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copy at <a href=
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"http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
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</div>
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</body>
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</html>
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