Dear all, so here is another question from me. Sometime, I feel I'm asking the wrong questions. Sorry about that. I would like to formulate disjunctive constraints with set variables (fd_sets). An example is either X1 disjoint X1 or Y1 disjoint Y2 where X1 .. Y2 are interger sets. Currently, I'm simulating this with ~= (notinstance), eg [X1, Y1] ~= [X2, Y2]. This works quite well. It would work even better if [Y1] ~= [Y2] would invoke Y1 disjoint Y2. Example: :- lib(fd_sets), (import (subset)/2 from fd_sets). :- lib(notinstance), (import (~=)/2 from notinstance). test :- X1 subset [1,2], #(X1,1), Y1 subset [1,2], #(Y1,1), X2 subset [1,2], #(X2,1), Y2 subset [1,2], #(Y2,1), [X1, Y1] ~= [X2, Y2], X1 = X2. Hs the delayed goal sync_attributes(fd_sets([](_280, _281), 0, 0, 2, _331, _332, ['SUSP-_1082-susp', 'SUSP-_342-susp', 'SUSP-_748-susp'], ['SUSP-_1082-susp'], 1, _277, X1{([] .. [1, 2]) : 1}), e(_737, 'SUSP-_1082-susp'), e(_738, 'SUSP-_1082-susp')) nu_wf([Y1{([] .. [1, 2]) : 1} ~= Y2{([] .. [1, 2]) : 1}]) Now my question: Is there a way to get the same behaviour in another way or to "invoke" Y1 disjoint Y2 without reprogramming ~=? My guess is: no But then: How hard is it to rewrite/change ~=. Do I have access to its code? Thank you for all your help, Uli -- Ulrich Scholz scholz@informatik.tu-darmstadt.de http://www.intellektik.informatik.tu-darmstadt.de/~scholzReceived on Thu Apr 24 15:48:21 2003
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