Originally posted by: FiFila

Hi;

What is the difference between concert and solver in CP optimizer? 

Best

Originally posted by: rdumeur

Dear Fifila,

The  "concert" term denotes the modeling layer. That is the set of classes and functions that allows you to build a constraint model.

The "solver" term  denotes the engine (the IloCP class in C++ API)  that produce variable assignments consistent with the constraints expressed in the constraint model.

I hope this helps,

        Cheers,

Originally posted by: FiFila

Thank Renaud;

Would you please let me know what is difference between IloConstraint and IlcConstraint , for instance difference between  cp.add(IlcConstraint) and  cp.add(IloConstraint)?

Best regards

Fila

Originally posted by: rdumeur

Dear FiFila,

The difference is that the IloConstraint is a handle to a data structure used as a model definition, when the IlcConstraint is a handle to a data structure used by the solver during solve. The ILO wrapper macros allows you to define a new type of IloConstraint for which you precise the kind of IlcConstraint that will be produced during solve  (it is the constraint returned in the body you specify when using the wrapper macro).

At the beginning of solve, the solver will scan the IloModel, and for each ILO constraint stored in it, it will invoke the associated IlcConstraint generation procedure. If your model include a custom constraint defined using the wrapper macros, then the procedure you've specified will be invoked to produce the appropriate IlcConstraint.

I hope this helps.

Cheers,