expression types,
          a grammar element for matching right-shift 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>
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