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doc/html/boost_config/boost_macro_reference.html
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Boost Macro Reference</title>
<link rel="stylesheet" href="../../../../../doc/html/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.74.0">
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<p>
<code class="computeroutput"><span class="identifier">BOOST_WORKAROUND</span></code>
</p>
</td>
<td>
<p>
This macro is used where a compiler specific workaround is required
that is not otherwise described by one of the other Boost.Config
macros. To use the macro you must first
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">workaround</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<p>
usage is then:
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor">#if</span> <span class="identifier">BOOST_WORKAROUND</span><span class="special">(</span><span class="identifier">MACRONAME</span><span class="special">,</span> <span class="identifier">CONDITION</span><span class="special">)</span>
<span class="comment">// workaround code goes here...
</span><span class="preprocessor">#else</span>
<span class="comment">// Standard conforming code goes here...
</span><span class="preprocessor">#endif</span>
</pre>
<p>
where <code class="computeroutput"><span class="identifier">MACRONAME</span></code> is
a macro that usually describes the version number to be tested against,
and <code class="computeroutput"><span class="identifier">CONDITION</span></code> is
a comparison operator followed by a value. For example <code class="computeroutput"><span class="identifier">BOOST_WORKAROUND</span><span class="special">(</span><span class="identifier">BOOST_INTEL</span><span class="special">,</span>
<span class="special">&lt;=</span> <span class="number">1010</span><span class="special">)</span></code> would evaluate to <code class="computeroutput"><span class="number">1</span></code> for Intel C++ 10.1 and earlier.
</p>
<p>
The macro can also be used with <code class="computeroutput"><span class="identifier">BOOST_TESTED_AT</span></code>
if all current compiler versions exhibit the issue, but the issue
is expected to be fixed at some later point.
</p>
<p>
For example <code class="computeroutput"><span class="identifier">BOOST_WORKAROUND</span><span class="special">(</span><span class="identifier">__BORLANDC__</span><span class="special">,</span> <span class="identifier">BOOST_TESTED_AT</span><span class="special">(</span><span class="number">0x590</span><span class="special">))</span></code> would normally evaluate to <code class="computeroutput"><span class="number">1</span></code> for all values of <code class="computeroutput"><span class="identifier">__BORLANDC__</span></code>
<span class="emphasis"><em>unless</em></span> the macro <code class="computeroutput"><span class="identifier">BOOST_DETECT_OUTDATED_WORKAROUNDS</span></code>
is defined, in which case evaluates to <code class="computeroutput"><span class="special">(</span><span class="identifier">__BORLANDC__</span> <span class="special">&lt;=</span>
<span class="number">0x590</span><span class="special">)</span></code>.
</p>
<p>
<span class="bold"><strong>Note</strong></span>: the ultimate source of documentation
for this macro is in <a href="../../../../../boost/detail/workaround.hpp" target="_top">boost/detail/workaround.hpp</a>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">BOOST_DEDUCED_TYPENAME</span></code>
@@ -3160,7 +3207,7 @@
</td>
<td>
<p>
Describes the boost version number in XXYYZZ format such that: <code class="computeroutput"><span class="special">(</span><span class="identifier">BOOST_VERSION</span>
Describes the boost version number in XYYYZZ format such that: <code class="computeroutput"><span class="special">(</span><span class="identifier">BOOST_VERSION</span>
<span class="special">%</span> <span class="number">100</span><span class="special">)</span></code> is the sub-minor version, <code class="computeroutput"><span class="special">((</span><span class="identifier">BOOST_VERSION</span>
<span class="special">/</span> <span class="number">100</span><span class="special">)</span> <span class="special">%</span> <span class="number">1000</span><span class="special">)</span></code>
is the minor version, and <code class="computeroutput"><span class="special">(</span><span class="identifier">BOOST_VERSION</span> <span class="special">/</span>
@@ -3534,7 +3581,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2001 -2007 Beman Dawes, Vesa Karvonen, John Maddock<p>
<td align="right"><div class="copyright-footer">Copyright &#169; 2001 -2007 Beman Dawes, Vesa Karvonen, John Maddock<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>