Hi Kish, you are absolutely right, this extension is very useful for cyclical rosters. Should not be very hard to enable in the current implementation, basically changing the check at posting the constraint. I see if I can do this and see if this gets accepted?
David >>> From: Kish Shen <[email protected]> To: <[email protected]> Date: 8/19/2010 2:03 AM Subject: [gecode-users] sequence constraint: variable occurring multiply Hi, I have another question about the sequence constraint: exception ArumentSame is thrown if a variable occurs more than once. Should this exception be thrown? I can see that it does not make sense for a variable to occur in a subsequence of q variables, but if the 'distance' between the same variable > q, i.e. it cannot occur multiply in the same subsequence, should this be allowed? Can the implemented algorithm deal with this? There are useful cases for variables to occur multiply, the simplest is a cycle, e.g. say for the following variables x1,x2,x3,x4,x5 and a cycle would be x1,x2,x3,x4,x5,x1,x2,.... such cycle could be used for a schedule that repeats. Cheers, Kish -- This e-mail may contain confidential and privileged material for the sole use of the intended recipient. Any review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive for the recipient), please contact the sender by reply e-mail and delete all copies of this message. Cisco Systems Limited (Company Number: 02558939), is registered in England and Wales with its registered office at 1 Callaghan Square, Cardiff, South Glamorgan CF10 5BT. _______________________________________________ Gecode users mailing list [email protected] https://www.gecode.org/mailman/listinfo/gecode-users _______________________________________________ Gecode users mailing list [email protected] https://www.gecode.org/mailman/listinfo/gecode-users
