VoidType.php

<?php

declare (strict_types=1);

/*
 * This file is part of sebastian/type.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace SebastianBergmann\Type;

final class VoidType extends Type {
    public function isAssignable(Type $other) : bool {
        return $other instanceof self;
    }
    public function name() : string {
        return 'void';
    }
    public function allowsNull() : bool {
        return false;
    }
    
    /**
     * @psalm-assert-if-true VoidType $this
     */
    public function isVoid() : bool {
        return true;
    }

}