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📁 ..
📄 CallableType.php(4.4 KB)
📄 GenericObjectType.php(986 B)
📄 IterableType.php(1.58 KB)
📄 NullType.php(603 B)
📄 ObjectType.php(1.47 KB)
📄 SimpleType.php(1.71 KB)
📄 Type.php(2 KB)
📄 TypeName.php(1.77 KB)
📄 UnknownType.php(581 B)
📄 VoidType.php(603 B)
📁 exception

Editing: CallableType.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 CallableType extends Type
{
    /**
     * @var bool
     */
    private $allowsNull;

public function __construct(bool $nullable)
    {
        $this->allowsNull = $nullable;
    }

/**
     * @throws RuntimeException
     */
    public function isAssignable(Type $other): bool
    {
        if ($this->allowsNull && $other instanceof NullType) {
            return true;
        }

if ($other instanceof self) {
            return true;
        }

if ($other instanceof ObjectType) {
            if ($this->isClosure($other)) {
                return true;
            }

if ($this->hasInvokeMethod($other)) {
                return true;
            }
        }

if ($other instanceof SimpleType) {
            if ($this->isFunction($other)) {
                return true;
            }

if ($this->isClassCallback($other)) {
                return true;
            }

if ($this->isObjectCallback($other)) {
                return true;
            }
        }

return false;
    }

public function getReturnTypeDeclaration(): string
    {
        return ': ' . ($this->allowsNull ? '?' : '') . 'callable';
    }

public function allowsNull(): bool
    {
        return $this->allowsNull;
    }

private function isClosure(ObjectType $type): bool
    {
        return !$type->className()->isNamespaced() && $type->className()->getSimpleName() === \Closure::class;
    }

/**
     * @throws RuntimeException
     */
    private function hasInvokeMethod(ObjectType $type): bool
    {
        try {
            $class = new \ReflectionClass($type->className()->getQualifiedName());
            // @codeCoverageIgnoreStart
        } catch (\ReflectionException $e) {
            throw new RuntimeException(
                $e->getMessage(),
                (int) $e->getCode(),
                $e
            );
            // @codeCoverageIgnoreEnd
        }

if ($class->hasMethod('__invoke')) {
            return true;
        }

return false;
    }

private function isFunction(SimpleType $type): bool
    {
        if (!\is_string($type->value())) {
            return false;
        }

return \function_exists($type->value());
    }

private function isObjectCallback(SimpleType $type): bool
    {
        if (!\is_array($type->value())) {
            return false;
        }

if (\count($type->value()) !== 2) {
            return false;
        }

if (!\is_object($type->value()[0]) || !\is_string($type->value()[1])) {
            return false;
        }

[$object, $methodName] = $type->value();

$reflector = new \ReflectionObject($object);

return $reflector->hasMethod($methodName);
    }

private function isClassCallback(SimpleType $type): bool
    {
        if (!\is_string($type->value()) && !\is_array($type->value())) {
            return false;
        }

if (\is_string($type->value())) {
            if (\strpos($type->value(), '::') === false) {
                return false;
            }

[$className, $methodName] = \explode('::', $type->value());
        }

if (\is_array($type->value())) {
            if (\count($type->value()) !== 2) {
                return false;
            }

if (!\is_string($type->value()[0]) || !\is_string($type->value()[1])) {
                return false;
            }

[$className, $methodName] = $type->value();
        }

\assert(isset($className) && \is_string($className));
        \assert(isset($methodName) && \is_string($methodName));

try {
            $class = new \ReflectionClass($className);

if ($class->hasMethod($methodName)) {
                $method = $class->getMethod($methodName);

return $method->isPublic() && $method->isStatic();
            }
            // @codeCoverageIgnoreStart
        } catch (\ReflectionException $e) {
            throw new RuntimeException(
                $e->getMessage(),
                (int) $e->getCode(),
                $e
            );
            // @codeCoverageIgnoreEnd
        }

return false;
    }
}

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