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Function Inheritance

 [1/2] from: lmecir::mbox::vol::cz at: 10-Mar-2003 16:09

Hi all, me and Romano are helping Gabriele to do some type definition experiments in Rebol. Gabriele wanted to have a "function inheritance" HOF like SUBFUNC or TSUBFUNC as follows:
>> tinsert: tsubfunc :insert load mold third :insert [print Inserting...
>> head tinsert/only [] []
Inserting... == [[]]
>> head tinsert [] [2]
Inserting... == [2] The only thing needed is to call SUPER without any arguments/refinements and the parent obtains all the arguments and refinements automatically. The sources of the functions are: and If you want to be able to use all argument handling methods (i.e. not just the normally evaluated arguments), you can use FUNCALL5 and PREPARE-AR5 (which support even unevaluated/fetched argument passing methods) instead of FUNCALL and PREPARE-AR, but it will be slower. The same holds for SUBFUNC and TSUBFUNC. TSUBFUNC is more reliable (no problem with error and set-word handling, etc.), but slower. Cheers -L

 [2/2] from: greggirwin:mindspring at: 10-Mar-2003 10:40

Hi Ladislav, Thanks to all you guys! I'm always amazed at the things you can make REBOL do. Now I need some free time to check it out. :\ -- Gregg