th>
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<p>
            Generally, and more formally, the semantic action <code class="computeroutput"><span class="identifier">F</span></code>
            attached to a generator <code class="computeroutput"><span class="identifier">G</span></code>
            needs to take a reference to the generator's attribute type as its first
            parameter. For more information about generator attributes please see
            the section Generator Attributes.
          </