Hi.

The documentation currently only covers modeling, but not implementing propagators (that will be added later). You'll have to look at propagators in the Gecode source code and try to adapt them. However, I have to admit I can't really see how to turn Euclid's algorithm into a propagator (other than just checking the constraint when the variables are assigned, of course).

Cheers,
        Guido

amina kemmar wrote:

Hi,

I want to implement a new constraint, witch is necessary to model my proper problem, but i didn't understand how to do this, for example, i try to implement the algorithm of Euclid, i read the documentation of gecode but it'is very vagueness for me;

if anyone can explain to me how to do this, i will be very thankfull.

amina.

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