Location: PHPKode > scripts > ps stack > ps-stack/list.abstr.php
<?php

/* Basic List Interface
 * By Asher Holley (http://www.wolfoxinc.com/opensource/)
 * Released under the GNU General Public License ( http://www.opensource.org/licenses/gpl-license.html )
 * Copyright © 2006 Asher Holley
 *
 * This contains a useful abstraction for list like structures like stacks,
      queues, bags, sets, etc. */

abstract class List_Abstr {
	abstract public function top();
	abstract public function &top_ref();
	abstract public function push();
	abstract public function push_ref( &$a );
	abstract public function pop();
	abstract public function &pop_ref();
	abstract public function index( $i );
	abstract public function &index_ref( $i );
	abstract public function count();
	abstract public function is_empty();
	abstract public function clear();
	abstract public function get_list();
}

?>
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