{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
                        let true_val = args[1].immediate_or_packed_pair(self);
                    | (OperandValue::Pair(_, _), OperandValue::Pair(_, _)) => {
                        let false_val = args[2].immediate_or_packed_pair(self);