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Stupid function contexts (or stupid Rebol user?)

 [1/5] from: d4marcus:dtek:chalmers:se at: 5-Dec-2001 22:00


Hi, For probably the hundredth time, I have stumbled over the problem with function contexts, or however you would call it. It's the usual problem: There's an object, containing a bunch of parse rules and a function. The parse rules make use of same words that are local to the function. This doesn't work of course. Solution 1 (bad): Put all the parse rules in the function, which means they are redefined every time the function is executed. Solution 2 (worse): Put all words in the object, which mean the function can only be called once at a time, i.e. it must finish until it can be called again, since some words can't be shared. This makes using it with several faces at once impossible. Solution 3 (good): Insert you suggestion here, please. :-) Btw, does anyone have a decent standalone presentation script? Something using simple colored named boxes, which you can connect your own docs presented in a similar fashion to the easy-draw doc (a full MDP-to-VID converter would be nicer still). I have thrown together one which almost does what I want, except that it doesn't quite work because of the problem above, and besides it's not general at all. A dialect for building this kind of presentation would come useful. Marcus ------------------------------------ If you find that life spits on you calm down and pretend it's raining

 [2/5] from: arolls::idatam::com::au at: 6-Dec-2001 14:12


> Solution 1 (bad): Put all the parse rules in the function, > which means > they are redefined every time the function is executed.
I don't think they are. Anton.

 [3/5] from: d4marcus:dtek:chalmers:se at: 7-Dec-2001 23:34


On Thu, 6 Dec 2001, Anton Rolls wrote:
> > Solution 1 (bad): Put all the parse rules in the function, > > which means > > they are redefined every time the function is executed. > > I don't think they are.
Ah, right. The blocks remain the same, and are just rebound to the words every time. Obviously it's not a speed problem. I just want to keep the rules outside the function to make it more readable. Anyway, it's not that important. Either I figure something out, or I will make a habit of putting the parse rules inside the function. But it would be cool to be able to bind a block to a function context. Marcus ------------------------------------ If you find that life spits on you calm down and pretend it's raining

 [4/5] from: ammonjohnson::yahoo at: 7-Dec-2001 18:22


Hm.. you seem quite bleak in question here. would you mind giving us an example where you_need_a word in the function to be the same spelling as a word that refers to a parse rule? Thanks!! Ammon

 [5/5] from: lmecir:mbox:vol:cz at: 8-Dec-2001 9:27


Hi Marcus, <<Marcus>> (...) But it would be cool to be able to bind a block to a function context. Marcus (...) <</Marcus>> That *is* possible. I used such a trick in my latest implementation of the REFINED function in %highfun.r OTOH, I think that in the case of Parse rules it might be an overkill... Cheers Ladislav