Hi Petr,
There will be a supported way to extend objects in the future.
- jim
At 10:09 PM 10/16/99 +0100, you wrote:
>
>
>[EMAIL PROTECTED] wrote:
>
>> >> >2) What can I imagine behing following words?
>> >> >
>> >> >"Functions and objects, when inspected, now return a copy of the block
>> >> >of words or values so the original can not be
>> >> >modified."
>> >> >
>> >>
>> >> Can you say "security"?
>> >
>> >OK, what does it mean - "inspected"? e.g. - when reffering to print obj/word
>> >REBOL will first create copy of that word? If so - why? We have 'protect
>> >function now available ... I think I am missing something here :-)
>> >
>>
>> It means that it used to be that you could modify the internals of
>> an object by doing something like:
>>
>> change skip first object 5 'foo
>>
>> Now, since 'first object' is a reference to a copy of object's words and
>> not a direct reference to object's words, it isn't possible anymore.
>> This closes a small hole of opportunity for buffer overrun types of
>> security hacking and prevents messing around with object and function
>> internals.
>
>??? Great, - now since extending of object by simply stating objname/new-word:
>new-value is not working as it returns invalid path, how can we extend object,
>once created? Can we do so only by creating new instance by cloning existing
>object, and adding new word and its value during the time of creation? What's the
>purpose of objects being so closed to further extensions? We now have 'protect
>function available to protect some state and values, so why why to limit objects
>in such way?
>
>Aha, protect doesn't work on objects nor their values, being words, hmm ...
>
>-pekr-
>
>> - jim
>
>
