emptyiterator.inc

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<?php

class EmptyIterator implements Iterator
{
    function rewind()
    {
        // nothing to do
    }

    function valid()
    {
        return false;
    }

    function current()
    {
        throw new Exception('Accessing the value of an EmptyIterator');
    }

    function key()
    {
        throw new Exception('Accessing the key of an EmptyIterator');
    }

    function next()
    {
        // nothing to do
    }
}

?>