{"ast_node_type":"variable","tokens":[{"end":87,"kind":"keyword","start":0,"text":"let"}]}
            let sign = if a_type.is_signed(self) { high >> sixty_three } else { zero };
            let high = self.high(a);
            let array_value = self.concat_low_high_rvalues(a_type, high >> shift_value, sign);