">
    <p>A type that provides the <em>sequence</em>&#39;s iteration interface and
encapsulates its iteration state.</p>

<p>By default, a <code>CollectionType</code> satisfies <code>SequenceType</code> by
supplying an <code>IndexingGenerator</code> as its associated <code>Generator</code>
type.</p>
</div>
</div>
<div class="declaration inherited">
<code class="language-swift">Index : ForwardIndexType</code>
<div class="comment">
    <p>A type that represents a valid position in the collection.</p>

<p>Vali