Class IlcRevFloat

IlcRevFloat is a reversible version of the basic predefined type, IlcFloat. The reversible version makes it easier to restore a previous state. This class has a value data member corresponding to IlcFloat. This value data member is automatically restored when CP Optimizer backtracks.

This class is not a handle class. Objects of this class should be used directly, that is, not through pointers to them. Do not create instances of IlcRevFloat as automatic objects (that is, as objects allocated on the C++ stack). Do not pass them by value.

An object of the class IlcRevFloat is automatically cast to the basic type IlcFloat, if needed. Instances of this reversible class can be used as data members. However, do not use them as types for automatic variables, where “automatic” has its usual C++ meaning, as this practice would create memory-access errors. Do not pass them as arguments.

An instance of IlcRevFloat behaves very much like an instance of IlcFloat; the difference in their behavior has to do with assignments. Indeed, all reversible assignments are undone when CP Optimizer backtracks.

For more information, see the concepts State in CP Optimizer and Reversibility in CP Optimizer.

The constructor creates a new object, an instance of IlcRevFloat.

This member function accesses the value of the instance of IlcRevFloat.

This operator returns the value of the instance of IlcRevFloat. In other words, this operator automatically casts an instance of IlcRevFloat into an instance of IlcFloat.

This member function modifies the value of the invoking object by reversibly assigning value to it. When CP Optimizer backtracks, this reversible modification will be undone.