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<?php declare(strict_types = 1);
namespace PHPStan\Type;
use Closure;
use PhpParser\Parser;
use PHPStan\BetterReflection\Identifier\IdentifierType;
use PHPStan\BetterReflection\Reflection\Adapter\ReflectionParameter;
use PHPStan\BetterReflection\Reflection\Adapter\ReflectionType;
use PHPStan\BetterReflection\Reflection\ReflectionParameter as BetterReflectionParameter;
use PHPStan\BetterReflection\Reflector\Reflector;
use PHPStan\BetterReflection\SourceLocator\Ast\FindReflectionsInTree;
use PHPStan\BetterReflection\SourceLocator\Ast\Strategy\NodeToReflection;
use PHPStan\BetterReflection\SourceLocator\Located\LocatedSource;
use PHPStan\BetterReflection\SourceLocator\SourceStubber\ReflectionSourceStubber;
use PHPStan\DependencyInjection\AutowiredParameter;
use PHPStan\DependencyInjection\AutowiredService;
use PHPStan\Reflection\InitializerExprContext;
use PHPStan\Reflection\InitializerExprTypeResolver;
use PHPStan\Reflection\ParameterReflection;
use PHPStan\Reflection\PassedByReference;
use PHPStan\Reflection\ReflectionProvider\ReflectionProviderProvider;
use PHPStan\ShouldNotHappenException;
use ReflectionFunction;
use function array_map;
use function count;
use function method_exists;
use function str_replace;
/**
* @api
*/
#[AutowiredService]
final class ClosureTypeFactory
{
public function __construct(
private InitializerExprTypeResolver $initializerExprTypeResolver,
private ReflectionSourceStubber $reflectionSourceStubber,
private Reflector $reflector,
private ReflectionProviderProvider $reflectionProviderProvider,
#[AutowiredParameter(ref: '@currentPhpVersionPhpParser')]
private Parser $parser,
)
{
}
/**
* @param Closure(mixed): mixed $closure
*/
public function fromClosureObject(Closure $closure): ClosureType
{
$closureReflectionFunction = new ReflectionFunction($closure);
$stubData = $this->reflectionSourceStubber->generateFunctionStubFromReflection($closureReflectionFunction);
if ($stubData === null) {
throw new ShouldNotHappenException('Closure reflection not found.');
}
$source = $stubData->getStub();
$source = str_replace('{closure}', 'foo', $source);
$locatedSource = new LocatedSource($source, '{closure}', $stubData->getFileName());
$find = new FindReflectionsInTree(new NodeToReflection());
$ast = $this->parser->parse($locatedSource->getSource());
if ($ast === null) {
throw new ShouldNotHappenException('Closure reflection not found.');
}
/** @var list<\PHPStan\BetterReflection\Reflection\ReflectionFunction> $reflections */
$reflections = $find($this->reflector, $ast, new IdentifierType(IdentifierType::IDENTIFIER_FUNCTION), $locatedSource);
if (count($reflections) !== 1) {
throw new ShouldNotHappenException('Closure reflection not found.');
}
$betterReflectionFunction = $reflections[0];
$parameters = array_map(fn (BetterReflectionParameter $parameter) => new class($parameter, $this->initializerExprTypeResolver) implements ParameterReflection {
public function __construct(private BetterReflectionParameter $reflection, private InitializerExprTypeResolver $initializerExprTypeResolver)
{
}
public function getName(): string
{
return $this->reflection->getName();
}
public function isOptional(): bool
{
return $this->reflection->isOptional();
}
public function getType(): Type
{
return TypehintHelper::decideTypeFromReflection(ReflectionType::fromTypeOrNull($this->reflection->getType()), isVariadic: $this->reflection->isVariadic());
}
public function passedByReference(): PassedByReference
{
return $this->reflection->isPassedByReference()
? PassedByReference::createCreatesNewVariable()
: PassedByReference::createNo();
}
public function isVariadic(): bool
{
return $this->reflection->isVariadic();
}
public function getDefaultValue(): ?Type
{
if (! $this->reflection->isDefaultValueAvailable()) {
return null;
}
$defaultExpr = $this->reflection->getDefaultValueExpression();
if ($defaultExpr === null) {
return null;
}
return $this->initializerExprTypeResolver->getType($defaultExpr, InitializerExprContext::fromReflectionParameter(new ReflectionParameter($this->reflection)));
}
}, $betterReflectionFunction->getParameters());
$selfClass = null;
if (method_exists($closureReflectionFunction, 'getClosureCalledClass') && $closureReflectionFunction->getClosureCalledClass() !== null) {
$potentialSelfClassName = $closureReflectionFunction->getClosureCalledClass()->getName();
$reflectionProvider = $this->reflectionProviderProvider->getReflectionProvider();
if ($reflectionProvider->hasClass($potentialSelfClassName)) {
$selfClass = $reflectionProvider->getClass($potentialSelfClassName);
}
} elseif ($closureReflectionFunction->getClosureScopeClass() !== null) {
$potentialSelfClassName = $closureReflectionFunction->getClosureScopeClass()->getName();
$reflectionProvider = $this->reflectionProviderProvider->getReflectionProvider();
if ($reflectionProvider->hasClass($potentialSelfClassName)) {
$selfClass = $reflectionProvider->getClass($potentialSelfClassName);
}
}
return new ClosureType($parameters, TypehintHelper::decideTypeFromReflection(ReflectionType::fromTypeOrNull($betterReflectionFunction->getReturnType()), selfClass: $selfClass), $betterReflectionFunction->isVariadic());
}
}