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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

}

}

?>