Class IlcIndex

To create a generic constraint, you need generic variables. In order to create generic variables for an array of constrained expressions, Solver provides this class IlcIndex.

A generic constraint is a constraint shared by an array of variables. For example, IlcAllDiff is a generic constraint that insures that all the elements of a given array are different from one another. Solver provides generic constraints to save memory since, if you use them, you can avoid allocating one object per variable.

You create a generic constraint simply by stating the constraint over generic variables. Each generic variable stands for all the elements of an array of constrained variables.

In that sense, generic variables are only syntactic objects provided by Solver to support generic constraints, and they can be used only for creating generic constraints. To create a generic variable, you use the operator []. The argument passed to that operator is known as the index for that generic variable; we say that the generic variable stems from that index.

An index is simply a syntactical means for creating generic variables for an array of constrained variables. The index has no value, and no value can be assigned to it. Any attempt to access the value of an index will throw an exception (an instance of IloSolver::SolverErrorException).

This constructor creates a handle object (an instance of the class IlcIndex) from a pointer to an object (an instance of the implementation class IlcIndexI).

This constructor creates an index which will be managed by solver.

This member function returns a pointer to the implementation object of the invoking handle, an index.