public function getPredecessors()
{
return new Vertex_IteratorAggregate($this, $this->getIncidentEdges());
}
/**
* Returns the vertices in this graph
* which are successors of this vertex.
*
* @return object IteratorAggregate
* The vertices in this graph which are successors of this vertex.
*/
public function getSuccessors()
{
return new Vertex_IteratorAggregate($this, $this->getEmanatingEdges());
}
/**
* Main program.
*
* @param array $args Command-line arguments.
* @return integer Zero on success; non-zero on failure.
*/
public static function main($args)
{
printf("Vertex main program.\n");
$status = 0;
return $status;
}
}
if (realpath($argv[0]) == realpath(__FILE__)) {
exit(Vertex::main(array_slice($argv, 1)));
}
