StaticType.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;

use function is_subclass_of;
use function strcasecmp;
final class StaticType extends Type {
    private TypeName $className;
    private bool $allowsNull;
    public function __construct(TypeName $className, bool $allowsNull) {
        $this->className = $className;
        $this->allowsNull = $allowsNull;
    }
    public function isAssignable(Type $other) : bool {
        if ($this->allowsNull && $other instanceof NullType) {
            return true;
        }
        if (!$other instanceof ObjectType) {
            return false;
        }
        if (0 === strcasecmp($this->className
            ->qualifiedName(), $other->className()
            ->qualifiedName())) {
            return true;
        }
        if (is_subclass_of($other->className()
            ->qualifiedName(), $this->className
            ->qualifiedName(), true)) {
            return true;
        }
        return false;
    }
    public function name() : string {
        return 'static';
    }
    public function allowsNull() : bool {
        return $this->allowsNull;
    }
    
    /**
     * @psalm-assert-if-true StaticType $this
     */
    public function isStatic() : bool {
        return true;
    }

}