<?php /** @file emptyiterator.inc * @ingroup SPL * @brief class EmptyIterator * @author Marcus Boerger * @date 2003 - 2005 * * SPL - Standard PHP Library */ /** @ingroup SPL * @brief An empty Iterator * @author Marcus Boerger * @version 1.0 * @since PHP 5.1 */ class EmptyIterator implements Iterator { /** No operation. * @return void */ function rewind() { // nothing to do } /** @return \c false */ function valid() { return false; } /** This function must not be called. It throws an exception upon access. * @throw Exception * @return void */ function current() { throw new Exception('Accessing the value of an EmptyIterator'); } /** This function must not be called. It throws an exception upon access. * @throw Exception * @return void */ function key() { throw new Exception('Accessing the key of an EmptyIterator'); } /** No operation. * @return void */ function next() { // nothing to do } } ?>