</h2>
<p>boost::proto::pre_inc &#8212; A metafunction for generating pre-increment expression types,
          a grammar element for matching pre-increment expressions, and
          a <a class="link" href="../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a> that dispatches to the
          <code class="computeroutput"><a class="link" href="pass_through.html" title="Struct template pass_through">proto::pass_through&lt;&gt;</a></code>
          transform.</p>
</div>
<h2 x