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42 lines
1.6 KiB
HTML
42 lines
1.6 KiB
HTML
<html>
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<head>
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<title>BOOST_PP_INTERCEPT</title>
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<link rel="stylesheet" type="text/css" href="../styles.css">
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<script language="javascript" type="text/javascript" src="../scripts.js"></script>
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</head>
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<body onload="init('sample');">
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<div style="margin-left: 0px;">
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The <b>BOOST_PP_INTERCEPT</b> macro intercepts a numeric concatenation and expands to nothing.
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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_INTERCEPT</b>
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</div>
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<h4>Remarks</h4>
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<div>
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This macro is used to intercept concatenations performed by various other library constructs.
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It is typically used after other text to prevent eat the concatenation expand to nothing.
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This macro can only intercept integer constants in the range of <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
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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="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/facilities/intercept.hpp.html"><boost/preprocessor/facilities/intercept.hpp></a>
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</div>
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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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<div id="sample"><pre>
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#include <boost/preprocessor/facilities/intercept.hpp>
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#include <boost/preprocessor/repetition/enum_binary_params.hpp>
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BOOST_PP_ENUM_BINARY_PARAMS(3, class T, = U)
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// expands to class T0 = U0, class T1 = U1, class T2 = U2
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BOOST_PP_ENUM_BINARY_PARAMS(3, class T, = int BOOST_PP_INTERCEPT)
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// expands to class T0 = int, class T1 = int, class T2 = int
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<pre></div>
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</body>
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</html>
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