/**
* Move forward to next leaf.
*/
public function next()
{
if ($this->current instanceof RecursiveLeafInterface) {
$this->current->next();
if ($this->current->valid()) {
if (!isset($this->crown[$this->key()])) {
throw new UnexpectedValueException(sprintf('Unexpected element with a unique key "%s".', $this->key()));
}
return;
}
}
$this->current = next($this->branch);
}
/**
* Move forward to next leaf.
*/
public function next()
{
if (is_null($this->current)) {
$this->current = current($this->children);
return;
}
if ($this->current instanceof RecursiveLeafInterface) {
$this->current->next();
if ($this->current->valid()) {
return;
}
}
$this->current = next($this->children);
}
/**
* Get next item
*/
public function next()
{
if ($this->generator) {
$this->generator->next();
}
}
