   </span><span class=identifier>iter_policy_t </span><span class=identifier>iter_policy</span><span class=special>(</span><span class=identifier>skip</span><span class=special>);
    </span><span class=identifier>scanner_policies_t </span><span class=identifier>policies</span><span class=special>(</span><span class=identifier>iter_policy</span><span class=special>);
    </span><span class=identifier>scanner_t </span><span class=identifier>scan</span><span class=special>(</span><span class=identifier>first<