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<?php
declare(strict_types=1);
namespace loophp\combinator\Combinator;
use Closure;
use loophp\combinator\Combinator;
/**
* Class Y.
*
* @psalm-template ResultType
*/
final class Y extends Combinator
{
* @var callable
private $f;
* Y constructor.
* @psalm-param callable $f
* @param callable $f
public function __construct(callable $f)
$this->f = $f;
}
* @psalm-return Closure(Closure(callable): mixed): mixed
public function __invoke()
$callable = $this->f;
$f = static function (callable $f) use ($callable): Closure {
return $callable(
static function (...$arguments) use ($f) {
return M::with()($f)(...$arguments);
);
};
return M::with()($f);
* @param callable $a
* @return Closure
public static function on(callable $a): Closure
return (new self($a))();
loophp /
combinator
