Using MUTABLE_CAST macro

This topic explains how to cast away the constant of the counter variable.

In the example code below, the class has a simple const getter function Var() . It uses MUTABLE_CAST to cast away the const -ness of the counter variable iGetCounter , which allows that variable to be changed.

      class TMutableDemo 
 TMutableDemo(TUint a=0):iVar(a),iGetCounter(0) {};
 TUint Var() const;
 TUint iVar;
 __MUTABLE TUint iGetCounter;

TUint TMutableDemo::Var() const 
 return iVar;