[gecode-users] branching and copy in Gecode

[Jun He]

Hi,

In Gecode, copy doesn't happen for every branching of the search tree, 
and whenever a failure happens it just backtracks to a node between the 
current failure node and the previous copied node.  If a propagator 
works dependent on some data structure, and the backtrack jumps to a 
node that is not copied, then the data structure should be recomputed.  
My question is how to maintain the data structure incrementally for the 
propagator?  Is there an easy setting to make Gecode copy at each 
branching, so that a simple undo policy can be used to maintain the data 
structure?

Best regards,
Jun