bt_list_for_each_entry(node, head, siblings) {
if (node->type != NODE_UNARY_EXPRESSION
- || node->u.unary_expression.type != UNARY_UNSIGNED_CONSTANT
|| (node->u.unary_expression.type != UNARY_UNSIGNED_CONSTANT && node->u.unary_expression.type != UNARY_SIGNED_CONSTANT)
|| node->u.unary_expression.link != UNARY_LINK_UNKNOWN
|| i != 0)