Add generic types to traversable implementations

Author: derrabus

ConstraintViolationList.php

@@ -15,6 +15,8 @@
  * Default implementation of {@ConstraintViolationListInterface}.
  *
  * @author Bernhard Schussek <[email protected]>
+ *
+ * @implements \IteratorAggregate<int, ConstraintViolationInterface>
  */
 class ConstraintViolationList implements \IteratorAggregate, ConstraintViolationListInterface
 {
@@ -116,7 +118,7 @@ public function remove(int $offset)
     /**
      * {@inheritdoc}
      *
-     * @return \ArrayIterator|ConstraintViolationInterface[]
+     * @return \ArrayIterator<int, ConstraintViolationInterface>
      */
     #[\ReturnTypeWillChange]
     public function getIterator()
@@ -145,7 +147,7 @@ public function offsetExists($offset)
     /**
      * {@inheritdoc}
      *
-     * @return mixed
+     * @return ConstraintViolationInterface
      */
     #[\ReturnTypeWillChange]
     public function offsetGet($offset)

ConstraintViolationListInterface.php

@@ -15,6 +15,9 @@
  * A list of constraint violations.
  *
  * @author Bernhard Schussek <[email protected]>
+ *
+ * @extends \ArrayAccess<int, ConstraintViolationInterface>
+ * @extends \Traversable<int, ConstraintViolationInterface>
  */
 interface ConstraintViolationListInterface extends \Traversable, \Countable, \ArrayAccess
 {

Constraints/GroupSequence.php

@@ -57,7 +57,7 @@ class GroupSequence
     /**
      * The groups in the sequence.
      *
-     * @var array<string|string[]|GroupSequence>
+     * @var array<int, string|string[]|GroupSequence>
      */
     public $groups;
 

Context/ExecutionContext.php

@@ -128,6 +128,10 @@ class ExecutionContext implements ExecutionContextInterface
      * @var bool[]
      */
     private $initializedObjects;
+
+    /**
+     * @var \SplObjectStorage<object, string>
+     */
     private $cachedObjectsRefs;
 
     /**