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> >> > With LibRandom you have to create a 'Variate' object, but
> >>
>
> >> But WHY do you think one cannot prepackage standard
>
> >> variates as read-only exported variables?
> >> This is the third time already this issue occurs!
> >> Stan was first to point it out a while ago, I discussed it too...
>
> It would not work here. Variates cannot be global variables
> as they have private state:
There are many exported variables declared with ABSTRACT types in BlackBox that have private state.
They contain references to (hidden) concrete types that are extensions of their static type.
For instance, TextViews.dir has static type TextViews.Directory and dynamic type StdDirectory.
At initialization, an object with a concrete extending type is allocated and the pointer is assigned to the global variable.
They call it "separation of interface from implementation".
It's one of the cornerstones of BlackBox.
The more flexible and general one's framework has to be, the more important this principle is.
Cheers
Fyodor
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Received on Wed Dec 01 2004 - 11:13:32 UTC