[SCIP] Multiple Constraint Handlers

[Stefan Vigerske]

Hi,

to SCIP, a SCIP_CONSDATA* is just a pointer that it receives from 
conshdlrs and passes it pack to conshdlrs. It's up to the conshdlr to 
figure out how to interpret the memory that the SCIP_CONSDATA* points 
to. Every constraint handler that comes with SCIP has its own 
understanding what its constraint data are (its own definition of the 
struct that SCIP_CONSDATA* points to) and so you can do in your 
constraint handlers. Casting may help.

Stefan

On 3/25/21 8:59 AM, Schrotenboer, Albert wrote:
> Dear SCIP developers and community,
> 
> 
> I work in C++. To keep my code neat, I'd like to implement multiple
> separate constraint handlers (for different type of inequalities).
> 
> My question concerns the SCIP_CONSDATA* struct which is basically attached
> to constraints you add /manage via the constraint handler.  Is it possible
> to create multiple SCIP_CONSDATA* structs associated with each of my
> constraint handlers? Of course, I cannot define it twice, and I don't think
> inheritance is the solution here as these are C structs..
> 
> 
> 
> If not, no problem, then I'll just need to manage some structs with a lot
> of data in it!
> 
> 
> 
> Thanks,
> 
> Albert
> 
> 
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