ecial>(</span><span class=identifier>first</span><span class=special>, </span><span class=identifier>last</span><span class=special>);

    </span><span class=keyword>if </span><span class=special>(</span><span class=identifier>p</span><span class=special>.</span><span class=identifier>parse</span><span class=special>(</span><span class=identifier>scan</span><span class=special>))
    </span><span class=special>{
        </span><span class=comment>//  Parsed successfully. If first == last, then we have
    