[gecode-users] Counting clones

[Christian Schulte]

Hi Marco,

Well, the number of clones _is_ the same for any value of c-d or a-d! You
have to backtrack, so you have to make a clone! The difference is that you
clone different spaces.

Christian

--
Christian Schulte, www.ict.kth.se/~cschulte/

> -----Original Message-----
> From: users-bounces at gecode.org [mailto:users-bounces at gecode.org] On
> Behalf Of Marco Correia
> Sent: Friday, June 01, 2012 6:54 PM
> To: 'gecode list'
> Subject: [gecode-users] Counting clones
> 
> Hi,
> 
> I suspect the answer to the following question should be somewhere in the
MPG
> document, but I was unable to find it - apologies if this is the case.
> 
> I am interested on obtaining the number of clones for a specific example
when
> subject to different value for the c_d parameter in the context of a DFS
search. I
> believe gecode used to report this value in the statistics, but now it
seems there
> is a specific class CloneStatistics which should be updated as search
proceeds. I
> fail to see how to pass an object of type CloneStatistics to the DFS
search
> object. Also the
> Space::clone() member function (which seems to be the only place where
this
> object can be updated) is not virtual, and therefore cannot be intercepted
in my
> subclass of Space (is this correct?). So I tried another approach, which
was
> simply to count the number of times that my
> copy() function gets called, which I thought should tell me the number of
clones.
> Now I think I'm wrong since this number always reports the same number of
> clones for different values of c_d.
> 
> Obviously I'm making some mistake. Any hints?
> 
> Thanks!
> 
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