1 files changed, 52 insertions, 0 deletions
diff --git a/vendor/nikic/php-parser/lib/PhpParser/NodeVisitor/NodeConnectingVisitor.php b/vendor/nikic/php-parser/lib/PhpParser/NodeVisitor/NodeConnectingVisitor.php
new file mode 100644
index 000000000..ea372e5b9
--- /dev/null
+++ b/vendor/nikic/php-parser/lib/PhpParser/NodeVisitor/NodeConnectingVisitor.php
@@ -0,0 +1,52 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\NodeVisitor;
+
+use PhpParser\Node;
+use PhpParser\NodeVisitorAbstract;
+
+/**
+ * Visitor that connects a child node to its parent node
+ * as well as its sibling nodes.
+ *
+ * On the child node, the parent node can be accessed through
+ * <code>$node->getAttribute('parent')</code>, the previous
+ * node can be accessed through <code>$node->getAttribute('previous')</code>,
+ * and the next node can be accessed through <code>$node->getAttribute('next')</code>.
+ */
+final class NodeConnectingVisitor extends NodeVisitorAbstract
+{
+    /**
+     * @var Node[]
+     */
+    private $stack = [];
+
+    /**
+     * @var ?Node
+     */
+    private $previous;
+
+    public function beforeTraverse(array $nodes) {
+        $this->stack    = [];
+        $this->previous = null;
+    }
+
+    public function enterNode(Node $node) {
+        if (!empty($this->stack)) {
+            $node->setAttribute('parent', $this->stack[count($this->stack) - 1]);
+        }
+
+        if ($this->previous !== null && $this->previous->getAttribute('parent') === $node->getAttribute('parent')) {
+            $node->setAttribute('previous', $this->previous);
+            $this->previous->setAttribute('next', $node);
+        }
+
+        $this->stack[] = $node;
+    }
+
+    public function leaveNode(Node $node) {
+        $this->previous = $node;
+
+        array_pop($this->stack);
+    }
+}