Method iterator_next()

Method iterator_next

mixed iterator_next(Iterator iter)

Description

Advance iter one step.

Returns

Returns UNDEFINED if the iterator failed to advance, and otherwise the value returned from lfun::_iterator_next().

Note

Zero values returned by lfun::_iterator_next() are converted to UNDEFINED when lfun::_iterator_value() is implemented.

See also

iterator_prev(), lfun::_iterator_next(), get_iterator()