This function returns a resource constraint evaluator whose operator(const IlcResourceConstraint& ct) returns the maximum value of the capacity variable of ct. If ct is not a variable resource constraint, the function returns the actual capacity required or produced by the resource constraint. Undefined behavior occurs if ct is not a capacity resource constraint. The maximum capacity of the virtual source and sink nodes is defined to be 0.

This functions exists with either an IloEnv or an IloSolver as argument.