Class IloCplex::NodeEvaluator

Node evaluators can be used to control the node selection strategy during goal-controlled search, that is, the order in which nodes are processed during branch & cut search using IloCplex goals. This is the handle class for objects of type IloCplex::NodeEvaluatorI, which allow you to control the node selection scheme.

IloCplex::NodeEvaluatorI objects are reference-counted. This means that every instance of IloCplex::NodeEvaluatorI keeps track of how many handle objects refer to it. When this number drops to 0, the IloCplex::NodeEvaluatorI object is automatically deleted. As a consequence, whenever you deal with node evaluators, you must maintain a handle object rather than just a pointer to the implementation object. Otherwise, you risk ending up with a pointer to an implementation object that has already been deleted.

The empty constructor creates a new evaluator containing no pointers to an implementation object.

This constructor creates a new evaluator with a pointer to an implementation. It increases the reference count of impl by one.

This copy constructor increments the reference count of the implementation object referenced by eval by one.

The destructor decreases the reference count of the implementation object by one. If this reduces the reference count to 0 (zero), the implementation object is automatically deleted.

Queries the implementation object.

The assignment operator increases the reference count of the implementation object of eval. If the invoking handle referred to an implementation object before the assignment operation, its reference count is decreased. If this decrement reduces the reference count to 0 (zero), the implementation object is deleted.