ILCRESOURCEDEMON

This macro creates an instance of the class DemonClass which is a subclass of IlcResourceDemon. When this demon is triggered, it executes the function method of the constraint ConstraintClass given as parameter to the macro. The signature of this method must be: void ConstraintClass::method(IlcResourceConstraint rct). The resource constraint given as argument is the one that is responsible for the triggering of the demon; for example, the resource constraint whose set of successors has changed.

Once the resource demon class has been defined with the macro ILCRESOURCEDEMON(DemonClass, ConstraintClass, method), an instance of this demon can be created by passing an instance of ConstraintClass as a parameter as follows:

 ConstraintClass* ct = ...;
 IlcResourceDemon myDemon = DemonClass(ct);

Example

The following code defines a couple of demons PrintDemonSucc and PrintDemonPred that respectively print the new successors and predecessors of any resource constraints whose set of successors or predecessors has changed.

  class PrintCtI :public IlcConstraintI {
  public:
  PrintCtI(IloSolver solver)
     :IlcConstraintI(solver){}
  void printNewSuccessors(IlcResourceConstraint changedRct) {
    getSolver().out() << "New successors of " << changedRct << ":" << endl;
    for (IlcResourceConstraintDeltaIterator ite(changedRct, IlcSuccessors); ite.ok(); ++ite) {
     getSolver().out() << "t" << *ite << endl;
    }
  }
  void printNewPredecessors(IlcResourceConstraint changedRct) {
    getSolver().out() << "New predecessors of " << changedRct << ":" << endl;
    for (IlcResourceConstraintDeltaIterator ite(changedRct, IlcPredecessors); ite.ok(); ++ite) {
     getSolver().out() << "t" << *ite << endl;
    }
  }
 };

 ILCRESOURCEDEMON(PrintDemonSucc, PrintCtI, printNewSuccessors);
 ILCRESOURCEDEMON(PrintDemonPred, PrintCtI, printNewPredecessors);

 IloSolver solver ...;
 IlcResource resource ...;

 PrintCtI* printCt = new (solver) PrintCtI(solver);

 resource.whenSuccessors(PrintDemonSucc(printCt));
 resource.whenPredecessors(PrintDemonPred(printCt));

Macro ILCRESOURCEDEMON