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