oost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="proto/reference.html#header.boost.proto.extends_hpp" title="Header &lt;boost/proto/extends.hpp&gt;">boost/proto/extends.hpp</a>&gt;

</span>BOOST_PROTO_BASIC_EXTENDS(Expr, Derived, Domain)</pre></div>
<div class="refsect1">
<a name="id-1.3.33.5.12.8.4"></a><h2>Description</h2>
<p>
        <code class="computeroutput">BOOST_PROTO_BASIC_EXTENDS()</code> adds the basic typedefs, m