feat: add AST checker engine framework with 9 Phase 1 engines

ast_checker/engines/node_exists.py

@@ -0,0 +1,19 @@
+from .base import BaseEngine
+
+
+class MustExistNodeEngine(BaseEngine):
+    def check(self, tree, rule, language, mapping):
+        target = rule["target"]
+        node_type = mapping.get(target, target)
+        if not self.has_node(tree.root_node, node_type):
+            return [rule.get("message", f"必须使用 {target}")]
+        return []
+
+
+class MustNotExistNodeEngine(BaseEngine):
+    def check(self, tree, rule, language, mapping):
+        target = rule["target"]
+        node_type = mapping.get(target, target)
+        if self.has_node(tree.root_node, node_type):
+            return [rule.get("message", f"不能使用 {target}")]
+        return []