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[REBOL] Re: On mutability and sameness

From: larry:ecotope at: 6-Jun-2001 16:07

Hi Joel
> But it is equally inaccurate to assume that they are fixed-size > scalar values, isn't it? > > >> foo: > == > >> repeat i 10 [print foo/:i] >> foo:
** Syntax Error: Invalid tuple -- Not necessarily, they could be fixed size at 10 bytes (which BTW shows that Volker's rule of 8 bytes does not hold). The "scalar" types could be tagged pointers (references) as suggested by Volker. A few bits in the pointer could designate the type and whether the value is contained within the pointer. As you probably know this is a common way of implementing "scalar" types in Scheme. For tuples, there could some bits in the pointer that say how long the tuple is with a max of 10. It is interesting to note that when an empty block is created:
>> b: make block! 10000
system/stats shows that 16 bytes of memory have been allocated for each block element. This might indicate that REBOL "pointers" or "references" are 16 bytes in length. Just a speculation... Regards -Larry PS This is fun too:
>> foo: 1.........