Add support for detecting exceptions thrown by magic methods (#58)

Author: marcospassos

README.md

@@ -10,8 +10,8 @@ This extension provides following rules and features:
 
 * Require `@throws` annotation when some checked exception is thrown ([examples](https://github.com/pepakriz/phpstan-exception-rules/blob/master/tests/src/Rules/data/throws-annotations.php))
 * Exception propagation over:
-	* function calls
-	* dynamic and static method calls
+	* Function calls
+	* Magic, dynamic and static method calls
 	* Iterable interface in foreach and in `iterator_*()` functions ([examples](https://github.com/pepakriz/phpstan-exception-rules/blob/master/tests/src/Rules/data/iterators.php))
 	* Countable interface combinated with `count()` function ([examples](https://github.com/pepakriz/phpstan-exception-rules/blob/master/tests/src/Rules/data/countables.php))
 	* JsonSerializable interface combinated with `json_encode()` function ([examples](https://github.com/pepakriz/phpstan-exception-rules/blob/master/tests/src/Rules/data/json-serializable.php))

src/Rules/ThrowsPhpDocRule.php

@@ -216,7 +216,11 @@ private function processMethodCall(MethodCall $node, Scope $scope): array
 			try {
 				$targetMethodReflection = $targetClassReflection->getMethod($methodName->toString(), $scope);
 			} catch (MissingMethodFromReflectionException $e) {
-				continue;
+				try {
+					$targetMethodReflection = $targetClassReflection->getMethod('__call', $scope);
+				} catch (MissingMethodFromReflectionException $e) {
+					continue;
+				}
 			}
 
 			$throwType = $this->dynamicThrowTypeService->getMethodThrowType($targetMethodReflection, $node, $scope);

tests/src/Rules/data/throws-annotations.php

@@ -21,6 +21,19 @@ function foo()  {
 	throw new RuntimeException();
 }
 
+class MagicService
+{
+
+	/**
+	 * @throws CheckedException
+	 */
+	public function __call($name, $arguments): void
+	{
+		throw new CheckedException();
+	}
+
+}
+
 class ThrowsAnnotationsClass
 {
 
@@ -164,6 +177,11 @@ public function callStaticUnionContainsUnknown(): void
 		$union::staticFoo(); // error: Missing @throws Pepakriz\PHPStanExceptionRules\Rules\Data\SomeRuntimeException annotation
 	}
 
+	public function callMagicMethod(): void
+	{
+		(new MagicService())->foo(); // error: Missing @throws Pepakriz\PHPStanExceptionRules\Rules\Data\CheckedException annotation
+	}
+
 }
 
 class ThrowInConstructor