t><span class="term"><code class="computeroutput"><span class="identifier">fs</span></code></span></dt>
<dd><p>
              A <a class="link" href="../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
              Sequence</a>
            </p></dd>
</dl>
</div>
<h5>
<a name="fusion.adapted.define_assoc_struct.h2"></a>
        <span class="phrase"><a name="fusion.adapted.define_assoc_struct.expression_semantics"></a></span><a class="link" href="define_assoc_struct.html#fusion.adapt