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From: Giuseppe Di Guglielmo <giuseppe.diguglielmo_at_...95...>

Date: Thu, 16 Oct 2008 14:11:36 +0200

Date: Thu, 16 Oct 2008 14:11:36 +0200

Dear all, I am using the 'ic' library, and in particular I am exploiting ECLiPSe to solve simple constraints like (X != 0 & Y > 0). As follow: ------ % load the library Interval Constraint % see at ECLiPSe "Constraint Library Manual" % in particular "IC: A Hybrid Finite Domain / Real Number Interval Constraint Solver" % http://87.230.22.228/doc/libman/libman016.html :- lib(ic). % the PIs X and Y are 32 bit INTEGER SIGNED [ -2^31 , ] % p :- L is -(2^31), R is (2^31)-1, write("Lower bound: "), writeln(L), write("Upper bound: "), writeln(R), X :: L..R, Y :: L..R, ( X #= 0 ) and ( Y #> 0), indomain(X, random), indomain(Y, random), writeln("X = 0 and Y != 0"), write("X: "), writeln(X), write("Y: "), writeln(Y), writeln("----"). ------ Now I'd like to define some variables as "bit vectors" and ask to the constraint solver to solve constraints like: X is bit_vector[7..0] % 8 bits vector Y is bit_vector[7..0] % 8 bits vector X[4] = 1 & Y[2] != 0 I expect as result, something like X = --1---- Y = ----0-- Where - could be (randomly 0 or 1). Is this possible in ECLiPSe? Does exist any workaround? Best regards, Giuseppe ---------------------------------------------------------------------------- Giuseppe Di Guglielmo Dept. of Computer Science - University of Verona Strada le Grazie, 15 - 37134 Verona - Italy Phone Office: +39 045 8027049 Fax: +39 045 8027068 Phone Home: +39 045 6152251 Mobile: +39 347 0493371 WWW: http://profs.sci.univr.it/~diguglielmo email: giuseppe.diguglielmo_at_...95... email: diguglielmo_at_...96... Skype: giuseppe.diguglielmo ---------------------------------------------------------------------------- This e-mail message is intended for the addressee(s) only and may contain confidential and or privileged information. If you are not the intended recipient of this e-mail message, you should not read, copy, forward or otherwise distribute or further disclose the information in it. If you have received this e-mail message in error, please contact the originator of this e-mail message via e-mail and delete all copies of this message from your computer or network, thank you.Received on Thu Oct 16 2008 - 12:11:48 CEST

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