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<h2><span class="refentrytitle">Macro BOOST_PROTO_EXTENDS_USING_ASSIGN</span></h2>
<p>BOOST_PROTO_EXTENDS_USING_ASSIGN — For exposing in classes that inherit from
<code class="computeroutput"><a class="link" href="boost/proto/extends.html" title="Struct template extends">proto::extends<></a></code>
the overloaded assignment operators defined therein.</p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="proto/reference.html#header.boost.proto.extends_hpp" title="Header <boost/proto/extends.hpp>">boost/proto/extends.hpp</a>>
</span>BOOST_PROTO_EXTENDS_USING_ASSIGN(Derived)</pre></div>
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<a name="idm45555190574816"></a><h2>Description</h2>
<p>
The standard usage of
<code class="computeroutput"><a class="link" href="boost/proto/extends.html" title="Struct template extends">proto::extends<></a></code>
is to inherit from it. However, the derived class automatically gets a compiler-generated assignment
operator that will hide the ones defined in
<code class="computeroutput"><a class="link" href="boost/proto/extends.html" title="Struct template extends">proto::extends<></a></code>.
Use <code class="computeroutput">BOOST_PROTO_EXTENDS_USING_ASSIGN()</code> in the derived class to unhide the assignment
operators defined in
<code class="computeroutput"><a class="link" href="boost/proto/extends.html" title="Struct template extends">proto::extends<></a></code>.
</p>
<p>
See <code class="computeroutput"><a class="link" href="boost/proto/extends.html" title="Struct template extends">proto::extends<></a></code>
for an example that demonstrates usage of <code class="computeroutput">BOOST_PROTO_EXTENDS_USING_ASSIGN()</code>.
</p>
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<td align="right"><div class="copyright-footer">Copyright © 2008 Eric Niebler<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>)
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