{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
            let r2 = ptr_offset_from(&x[3], &x[1]);
            let r1 = -ptr_offset_from(&x[0], &x[4]);
            let r3 = ptr_offset_from_unsigned(&x[3], &x[0]) as isize;