_cbor_stack_record
struct _cbor_stack_record *top = stack->top;
struct _cbor_stack_record *_cbor_stack_push(struct _cbor_stack *stack,
struct _cbor_stack_record *new_top =
_cbor_malloc(sizeof(struct _cbor_stack_record));
*new_top = (struct _cbor_stack_record){stack->top, item, subitems};
struct _cbor_stack_record *lower;
struct _cbor_stack_record *top;
struct _cbor_stack_record *_cbor_stack_push(struct _cbor_stack *, cbor_item_t *,