Fixed #4067 by implementing _attributes and _fields for the AST root node.
diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 4613500..46688a3 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -824,12 +824,30 @@
return 0;
}
+static int add_ast_fields()
+{
+ PyObject *empty_tuple, *d;
+ if (PyType_Ready(&AST_type) < 0)
+ return -1;
+ d = AST_type.tp_dict;
+ empty_tuple = PyTuple_New(0);
+ if (!empty_tuple ||
+ PyDict_SetItemString(d, "_fields", empty_tuple) < 0 ||
+ PyDict_SetItemString(d, "_attributes", empty_tuple) < 0) {
+ Py_XDECREF(empty_tuple);
+ return -1;
+ }
+ Py_DECREF(empty_tuple);
+ return 0;
+}
+
""", 0, reflow=False)
self.emit("static int init_types(void)",0)
self.emit("{", 0)
self.emit("static int initialized;", 1)
self.emit("if (initialized) return 1;", 1)
+ self.emit("if (add_ast_fields() < 0) return 0;", 1)
for dfn in mod.dfns:
self.visit(dfn)
self.emit("initialized = 1;", 1)