[gecode-users] Obtaining information about variablesHi for variable selection

[Mikael Zayenz Lagerkvist]

Hi,

The degree-information for variables is only available through the
view-interfaces [1]. Similarly for regret-information.

As a simple example, given that you have an IntVar x, and you want to
access the degree-information, you could do the following:
    IntVar x;
    // ...
    Int::IntView xv(x);
    if (xv.degree() > some_degree) {

Cheers,
Mikael

[1]
Integer views: http://www.gecode.org/doc-latest/reference/group__TaskActorIntView.html
Set views: http://www.gecode.org/doc-latest/reference/group__TaskActorSetView.html

On Thu, Jul 2, 2009 at 3:43 AM, Kish Shen<kisshen at cisco.com> wrote:
> Hi,
>
> Is it possible to obtain the information used in the branch() variable
> selection. I am currently most interested in the degree (number of
> propagator depending on a variable) for the IntVars, because there I
> can't find any easy way to obtain this information, but I assume Gecode
> keeps this information internally.
>
> The reason I am interested in this information is for the interface to
> Gecode I am developing for ECLiPSe. I now have a basic working version
> where Gecode is used to perform the propagation of the constraints,
> while ECLiPSe does the search, which include variable and value
> selections. I need the degree information for variable selection, and
> because the selection is done in ECLiPSe, I cannot use branch().
>
> Thanks in advance for any help and information!
>
> Cheers,
>
> Kish
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-- 
Mikael Zayenz Lagerkvist, http://www.ict.kth.se/~zayenz/