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The IloEvaluator template class is the base class
for all evaluators. An evaluator is a class that
implements an evaluation on an object (using operator())
and returns an IloNum value. Such classes can be used (along
with classes of IloPredicate) to
parameterize selectors used in goal-based search.
Evaluators can easily be built by using the
ILOEVALUATOR0 macros or by composing
existing evaluators and predicates.
For more information, see Selectors.
See Also:
IloPredicate, IloTranslator, IloComparator
| Method Summary | |
|---|---|
public IloComparator< IloObject > | makeGreaterThanComparator() constCreates an evaluator-based comparator. |
public IloComparator< IloObject > | makeLessThanComparator() constCreates an evaluator-based comparator. |
public IloNum | operator()(IloObject o, IloAny nu=0) constEvaluates an object. |
| Method Detail |
|---|
This member function returns a comparator based on the invoking evaluator that prefers the objects with the highest value. More precisely, the comparator will return 1, 0, or -1 if the value of its left hand side is respectively greater than, equivalent, or less than the value of its right hand side.
This member function returns a comparator based on the invoking evaluator that prefers the objects with the smallest value. More precisely, the comparator will return 1, 0, or -1 if the value of its left hand side is respectively less than, equivalent, or greater than the value of its right hand side.
This operator implements the evaluation of o, an instance of
class IloObject, given a context nu. If
the evaluator is a composite evaluator (see operators on
evaluators), the context is also passed to the
components (evaluators or predicates) of the composite
evaluator.