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<?php
/** @file emptyiterator.inc
* @ingroup SPL
* @brief class EmptyIterator
* @author Marcus Boerger
* @date 2003 - 2009
*
* 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
}
}
?>