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<?php
declare(strict_types=1);
namespace loophp\combinator\Combinator;
use loophp\combinator\Combinator;
/**
* Class S.
*/
final class S extends Combinator
{
* @var callable
private $f;
private $g;
* @var mixed
private $x;
* S constructor.
*
* @param callable $f
* @param callable $g
* @param mixed $x
public function __construct(callable $f, callable $g, $x)
$this->f = $f;
$this->g = $g;
$this->x = $x;
}
* @return mixed
public function __invoke()
return ($this->f)($this->x)(($this->g)($this->x));
* @return callable
public static function closure(): callable
return static function (callable $f, callable $g, $x) {
return (new self($f, $g, $x))();
};
loophp /
combinator
