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preprocessor/docs.1/ref/not_equal.html
Paul Mensonides cdc4be5256 initial revision
[SVN r15198]
2002-09-08 09:40:56 +00:00

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<title>BOOST_PP_NOT_EQUAL</title>
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The <b>BOOST_PP_NOT_EQUAL</b> macro compares two values for inequality.
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<h4>Usage</h4>
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<b>BOOST_PP_NOT_EQUAL</b>(<i>x</i>, <i>y</i>)
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<h4>Arguments</h4>
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<dt>x</dt>
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The left operand of the comparison.&nbsp;
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
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<dt>y</dt>
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The right operand of the comparison.&nbsp;
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
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<h4>Remarks</h4>
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If <i>x</i> is equal to <i>y</i>, this macro expands to <i>0</i>.&nbsp;
Otherwise, it expands to <i>1</i>.
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Previously, this macro could not be used inside <b>BOOST_PP_WHILE</b>.&nbsp;
There is no longer any such restriction because this macro no longer uses <b>BOOST_PP_WHILE</b>.
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<h4>See Also</h4>
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<li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
<li><a href="not_equal_d.html">BOOST_PP_NOT_EQUAL_D</a></li>
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<h4>Requirements</h4>
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<b>Header:</b> &nbsp;<a href="../headers/comparison/not_equal.hpp.html">&lt;boost/preprocessor/comparison/not_equal.hpp&gt;</a>
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<h4><a class="local" onclick="toggle('sample');" onmouseover="change(this);" onmouseout="revert(this);">Sample Code</a></h4>
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#include &lt;boost/preprocessor/comparison/not_equal.hpp&gt;
BOOST_PP_NOT_EQUAL(4, 3) // expands to 1
BOOST_PP_NOT_EQUAL(5, 5) // expands to 0
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