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Example:</p> +<pre class="programlisting"><span class="comment">//[includes and namespaces omitted for brevity]</span> + +<span class="comment">//This macro will create the following class:</span> +<span class="comment">// template<bool Enabled></span> +<span class="comment">// struct incremental</span> +<span class="comment">// { unspecified_content };</span> +<span class="identifier">BOOST_INTRUSIVE_OPTION_CONSTANT</span><span class="special">(</span><span class="identifier">incremental</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">,</span> <span class="identifier">Enabled</span><span class="special">,</span> <span class="identifier">is_incremental</span><span class="special">)</span> + +<span class="keyword">struct</span> <span class="identifier">empty_default</span><span class="special">{</span><span class="special">}</span><span class="special">;</span> + +<span class="keyword">const</span> <span class="keyword">bool</span> <span class="identifier">is_incremental</span> <span class="special">=</span> <span class="identifier">pack_options</span><span class="special"><</span> <span class="identifier">empty_default</span><span class="special">,</span> <span class="identifier">incremental</span><span class="special"><</span><span class="keyword">true</span><span class="special">></span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span><span class="special">::</span><span class="identifier">is_incremental</span><span class="special">;</span> + +<span class="identifier">BOOST_STATIC_ASSERT</span><span class="special">(</span><span class="special">(</span> <span class="identifier">is_incremental</span> <span class="special">==</span> <span class="keyword">true</span> <span class="special">)</span><span class="special">)</span><span class="special">;</span> +</pre> +<p> </p> +</div> +</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 © 2005 Olaf Krzikalla<br>Copyright © 2006-2015 Ion Gaztanaga<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> +</div></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="BOOST_IN_idm45690482233648.html"><img src="../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="intrusive/reference.html#header.boost.intrusive.pack_options_hpp"><img src="../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="index.html"><img src="../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="boost/intrusive/get_pare_idm45690482219360.html"><img src="../../doc/src/images/next.png" alt="Next"></a> +</div> +</body> +</html> |