[gemma4] update parser logic

skillls/parser.py

@@ -44,38 +44,42 @@ class SkillParser:
 
     def _traverse_tree(
         self, 
-        node, 
+        root_node, 
         content: str, 
         diagnostics: list[Diagnostic], 
         symbols: list[DocumentSymbol]
     ) -> None:
-        """Recursively traverses the AST to find errors and symbols."""
-        
-        # 1. Handle Errors (Diagnostics)
-        if node.type in ERROR_NODE_TYPES:
-            start_point = node.start_point
-            end_point = node.end_point
+        """Iteratively traverses the AST to find errors and symbols."""
+        stack = [root_node]
+
+        while stack:
+            node = stack.pop()
             
-            diagnostics.append(
-                Diagnostic(
-                    range=Range(
-                        start=Position(start_point[0], start_point[1]),
-                        end=Position(end_point[0], end_point[1])
-                    ),
-                    message=f"Syntax error: unexpected {node.type} token",
-                    severity=DiagnosticSeverity.Error,
+            # 1. Handle Errors (Diagnostics)
+            if node.type in ERROR_NODE_TYPES:
+                start_point = node.start_point
+                end_point = node.end_point
+                
+                diagnostics.append(
+                    Diagnostic(
+                        range=Range(
+                            start=Position(start_point[0], start_point[1]),
+                            end=Position(end_point[0], end_point[1])
+                        ),
+                        message=f"Syntax error: unexpected {node.type} token",
+                        severity=DiagnosticSeverity.Error,
+                    )
                 )
-            )
 
-        # 2. Handle Symbols (Document Symbols / Outline)
-        if self._is_symbol_node(node):
-            symbol = self._create_document_symbol(node, content)
-            if symbol:
-                symbols.append(symbol)
+            # 2. Handle Symbols (Document Symbols / Outline)
+            if self._is_symbol_node(node):
+                symbol = self._create_document_symbol(node, content)
+                if symbol:
+                    symbols.append(symbol)
 
-        # 3. Continue traversal
-        for child in node.children:
-            self._traverse_tree(child, content, diagnostics, symbols)
+            # 3. Continue traversal - push children in reverse order to maintain original DFS order
+            for child in reversed(node.children):
+                stack.append(child)
 
     def _is_symbol_node(self, node) -> bool:
         """Determines if a node is significant enough to be an outline symbol."""