<?php declare(strict_types = 1);

namespace PHPStan\Type;

use PHPStan\Analyser\NameScope;

use PHPStan\PhpDoc\TypeNodeResolver;

use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;

use PHPStan\PhpDocParser\Ast\Type\TypeNode;

final class TypeAlias

{

private ?Type $resolvedType = null;

public function __construct(

private TypeNode $typeNode,

private NameScope $nameScope,

)

{

}

public static function invalid(): self

{

$self = new self(new IdentifierTypeNode('*ERROR*'), new NameScope(null, []));

$self->resolvedType = new CircularTypeAliasErrorType();

return $self;

}

public function resolve(TypeNodeResolver $typeNodeResolver): Type

{

return $this->resolvedType ??= $typeNodeResolver->resolve(

$this->typeNode,

$this->nameScope,

);

}

}