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lib cleanup

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[SVN r15693]
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Paul Mensonides
2002-10-03 22:13:37 +00:00
parent ae584c68b2
commit 4bb690a819
263 changed files with 14965 additions and 16 deletions
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<html>
<head>
<title>BOOST_PP_DEDUCE_Z</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
</head>
<body>
<div style="margin-left: 0px;">
The <b>BOOST_PP_DEDUCE_Z</b> macro manually deduces the state of the <b>BOOST_PP_REPEAT</b> construct.
</div>
<h4>Usage</h4>
<div class="code">
<b>BOOST_PP_DEDUCE_Z</b>()
</div>
<h4>Remarks</h4>
<div>
This macro is intended to avoid the use of <i>automatic-recursion</i> at deep expansion depths.&nbsp;
<i>Automatic-recursion</i> at such depths can be inefficient on some preprocessors.&nbsp;
It is not intended to be used directly with the invocation of macros with a <b>_Z</b> suffix such as:
<div>
<b>BOOST_PP_ENUM_PARAMS_Z</b>(<b>BOOST_PP_DEDUCE_Z</b>(), (a, (b, (c, <b>BOOST_PP_NIL</b>))))
</div>
If it is used in this context, the <b>_Z</b> macro will fail.&nbsp;
The <b>_Z</b> macros directly concatenate to the <i>r</i> parameter that is passed to them,
which would prevent <b>BOOST_PP_DEDUCE_Z</b>() from expanding.&nbsp;
Furthermore, it is pointless to use this macro in a situation such as this
because it would already be too late to gain any efficiency.
</div>
<h4>See Also</h4>
<ul>
<li><a href="repeat.html">BOOST_PP_REPEAT</a></li>
</ul>
<h4>Requirements</h4>
<div>
<b>Header:</b> &nbsp;<a href="../headers/repetition/deduce_z.hpp.html">&lt;boost/preprocessor/repetition/deduce_z.hpp&gt;</a>
</div>
</body>
</html>