1 files changed, 197 insertions, 0 deletions
diff --git a/vendor/sebastian/type/src/CallableType.php b/vendor/sebastian/type/src/CallableType.php
new file mode 100644
index 000000000..026762eaf
--- /dev/null
+++ b/vendor/sebastian/type/src/CallableType.php
@@ -0,0 +1,197 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use function assert;
+use function class_exists;
+use function count;
+use function explode;
+use function function_exists;
+use function is_array;
+use function is_object;
+use function is_string;
+use function strpos;
+use Closure;
+use ReflectionClass;
+use ReflectionException;
+use ReflectionObject;
+
+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 name(): string
+    {
+        return 'callable';
+    }
+
+    public function allowsNull(): bool
+    {
+        return $this->allowsNull;
+    }
+
+    private function isClosure(ObjectType $type): bool
+    {
+        return !$type->className()->isNamespaced() && $type->className()->simpleName() === Closure::class;
+    }
+
+    /**
+     * @throws RuntimeException
+     */
+    private function hasInvokeMethod(ObjectType $type): bool
+    {
+        $className = $type->className()->qualifiedName();
+        assert(class_exists($className));
+
+        try {
+            $class = new ReflectionClass($className);
+            // @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] = $type->value();
+
+        return (new ReflectionObject($object))->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($className) && class_exists($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;
+    }
+}