In article , sjack  wrote:   
   >Had some notes from long back for building QUAN and VECT using DOES>   
   >exploits from examples in Baranoff papers (no surviving link). Apparently   
   >the Forth I had then had the same type of CREATE DOES> that with   
   >DOES> exploits could produce words with multiple CFAs.   
   >I decided to do the same in TOAD, a FigForth derivative, which   
   > have CFA followed by a vector. The result was   
   >words with multiple vectors and helpers that used ENTER instead of   
   >EXECUTE. But then I found QUAN could be easily built without   
   >exploits. It reduced to a simple VALUE with the same TO but only   
   >without any type checks (could be added). However, I think the point   
   >of the Baranoff papers was not so much about what it takes to build   
   >QUAN but how DOES> exploits work and how they might be used which   
   >I did find informative and interesting.   
   >   
   >In a nut shell, DOES> exploits add small words that begin with DOES>   
   >followed by a small silver of code:   
   >     : FOO does> ... ;   
   >When executed in a defining word, they  provide alternate execution   
   >paths available for helper words (these paths are not compiled into the   
   >the defining words but are taken from these exploit words directly).   
   >Also, the defining word has access to the defined word's CFA therefore   
   >a link to the defined word's data field address, DFA , if needed.   
   >   
   >Those DOES> exploit words remind me of mRNA bringing in component material   
   >for functioning of the DNA in building proteins (which used to be   
   >a good thing).   
      
   For a practical approach using multiple DOES>-like fields see   
   the one screen OO class definitions in ciforth.   
   The first thing you must loose is the notion that DOES> .. ;   
   is a good syntac for what you want to accomplish.   
      
   If has proven its worth with manx (controlling mechanical instruments)   
   and ciasdis (reverse engineering assembler/disassembler.)   
      
   Groetjes Albert   
   --   
   Don't praise the day before the evening. One swallow doesn't make spring.   
   You must not say "hey" before you have crossed the bridge. Don't sell the   
   hide of the bear until you shot it. Better one bird in the hand than ten in   
   the air. First gain is a cat purring.            - the Wise from Antrim -   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)