관리-도구

편집 파일: NullType.php

<?php

declare(strict_types=1);

namespace CuyZ\Valinor\Type\Types;

use CuyZ\Valinor\Compiler\Native\ComplianceNode;
use CuyZ\Valinor\Compiler\Node;
use CuyZ\Valinor\Type\Type;
use CuyZ\Valinor\Utility\IsSingleton;

/** @internal */
final class NullType implements Type
{
    use IsSingleton;

public function accepts(mixed $value): bool
    {
        return $value === null;
    }

public function compiledAccept(ComplianceNode $node): ComplianceNode
    {
        return $node->equals(Node::value(null));
    }

public function matches(Type $other): bool
    {
        if ($other instanceof UnionType) {
            return $other->isMatchedBy($this);
        }

return $other instanceof self
            || $other instanceof MixedType;
    }

public function inferGenericsFrom(Type $other, Generics $generics): Generics
    {
        return $generics;
    }

public function nativeType(): Type
    {
        return $this;
    }

public function toString(): string
    {
        return 'null';
    }
}

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