[Scip] SCIP_ConsData in constraint handler using C++

[Grit Claßen]

Hello,

I am implementing a constraint handler for branching constraints in a 
Branch-and-Price framework. To store some information on the 
constraints, I would like to define a specific SCIP_ConsData. Following 
the examples (bin packing or graph coloring), the SCIP_ConsData could be 
defined like this:

struct SCIP_ConsData
{
     int                   itemid1;           /**< item id one */
     int                   itemid2;           /**< item id two */
     CONSTYPE              type;               /**< stores whether the 
items have to be in the SAME or DIFFER packing */
     int                   npropagatedvars;    /**< number of variables 
that existed, the last time, the related node was
                                                *   propagated, used to 
determine whether the constraint should be
                                                *   repropagated*/
     int                   npropagations;      /**< stores the number 
propagations runs of this constraint */
     unsigned int          propagated:1;       /**< is constraint 
already propagated? */
     SCIP_NODE*            node;               /**< the node in the 
B&B-tree at which the cons is sticking */
};


However, as I am using C++ this overload of "typedef struct 
SCIP_ConsData 
SCIP_CONSDATA<http://scip.zib.de/doc/html_devel/type__cons_8h.html#ac55797a3c65d3ec89dd29921d953c36e>" 
does not work, i.e., I cannot use SCIP_CONSDATA instead of SCIP_ConsData 
when implementing the callback functions of the constraint handler. The 
only way to handle constraint data, I can think of, is to use some maps 
(e.g. constraint to constraint data etc.). Is there a less cumbersome way?

Thanks,
Grit
-- 

Dipl.-Comp.Math. Grit Claßen

UMIC Research Centre and Lehrstuhl II für Mathematik
RWTH Aachen University
52056 Aachen
Germany

phone: +49 241 80 20753 or +49 241 80 94999
http://www.math2.rwth-aachen.de
http://www.isek.rwth-aachen.de

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