=identifier>index</span><span class=special>&lt;</span><span class=identifier>Tag</span><span class=special>&gt;::</span><span class=identifier>type</span><span class=special>::</span><span class=identifier>const_iterator</span> <span class=identifier>project</span><span class=special>(</span><span class=identifier>IteratorType</span> <span class=identifier>it</span><span class=special>)</span><span class=keyword>const</span><span class=special>;</span>
<span class=special>};</span>

<span class=comment>// 