[gecode-users] finding number of propagators for s Space, relation to floundering

[Kish Shen]

On 29/06/2015 23:51, Kish Shen wrote:
>
> ?- A :: 1 .. 20, gfd : min([100, A], M), get_constraints_number(M, D).
>
> This shows that the variable M (and I also checked A, not shown here)
> still have a propagator attached to it

Thinking about this, I think the propagator might be a constraint 
linking M and A, as Gecode cannot unify the variables as ic does....

However, I was actually looking at argmin when I noticed that there was 
a propagator attached when the constraint was satisfied, but I decided 
to look at min instead as ic does not have argmin.

I can't show the ECLiPSe execution with argmin, as that is on a VNC 
window that I can't use cut and paste on, but here is what I tried:

min_index([1,2,3,1,4], I), get_constraints_number(I, D).

I = I{[1,4]}
D = 1

so there is 1 propagator attached to I in this case, when min_index 
(argmin) is entailed.

Cheers,

Kish