{
protected abstract function gpc();
public function gen()
{
(yield $this->gpc());
}
}
class C1
{
use T;
protected function gpc()
{
return 1;
}
}
class C2
{
use T;
protected function gpc()
{
return 2;
}
}
$obj1 = new C1();
$obj2 = new C2();
$c1 = $obj1->gen();
$c2 = $obj2->gen();
$c1->next();
var_dump($c1->current());
$c2->next();
var_dump($c2->current());
