Node::getSubNodes() changed to IteratorAggregate generator,

src/Neon/Node.php

@@ -10,8 +10,10 @@
 namespace Nette\Neon;
 
 
-/** @internal */
-abstract class Node
+/**
+ * @implements \IteratorAggregate<Node>
+ */
+abstract class Node implements \IteratorAggregate
 {
 	/** @var ?int */
 	public $startTokenPos;
@@ -33,9 +35,9 @@ abstract public function toValue();
 	abstract public function toString(): string;
 
 
-	/** @return self[] */
-	public function getSubNodes(): array
+	public function &getIterator(): \Generator
 	{
-		return [];
+		return;
+		yield;
 	}
 }

src/Neon/Node/ArrayItemNode.php

@@ -80,8 +80,11 @@ public function toString(): string
 	}
 
 
-	public function getSubNodes(): array
+	public function &getIterator(): \Generator
 	{
-		return $this->key ? [&$this->key, &$this->value] : [&$this->value];
+		if ($this->key) {
+			yield $this->key;
+		}
+		yield $this->value;
 	}
 }

src/Neon/Node/ArrayNode.php

@@ -25,13 +25,10 @@ public function toValue(): array
 	}
 
 
-	public function getSubNodes(): array
+	public function &getIterator(): \Generator
 	{
-		$res = [];
 		foreach ($this->items as &$item) {
-			$res[] = &$item;
+			yield $item;
 		}
-
-		return $res;
 	}
 }

src/Neon/Node/EntityChainNode.php

@@ -43,13 +43,10 @@ public function toString(): string
 	}
 
 
-	public function getSubNodes(): array
+	public function &getIterator(): \Generator
 	{
-		$res = [];
 		foreach ($this->chain as &$item) {
-			$res[] = &$item;
+			yield $item;
 		}
-
-		return $res;
 	}
 }

src/Neon/Node/EntityNode.php

@@ -48,13 +48,12 @@ public function toString(): string
 	}
 
 
-	public function getSubNodes(): array
+	public function &getIterator(): \Generator
 	{
-		$res = [&$this->value];
+		yield $this->value;
+
 		foreach ($this->attributes as &$item) {
-			$res[] = &$item;
+			yield $item;
 		}
-
-		return $res;
 	}
 }

src/Neon/Traverser.php

@@ -57,7 +57,7 @@ private function traverseNode(Node $node): Node
 		}
 
 		if ($children) {
-			foreach ($node->getSubNodes() as &$subnode) {
+			foreach ($node as &$subnode) {
 				$subnode = $this->traverseNode($subnode);
 				if ($this->stop) {
 					break;