> Nil is not a routine, it is a value, it means that the object > is empty, it does not exist / is not allocated. Nil in > existing implementations that I know is represented by the value zero. > > The typical life-cycle of a object is: > > MyObject := TMyObject.Create; > try > MyObject.DoSomething(); > finally > MyObject.Free; > end; >
One pitfall: the variable MyObject before MyObject := TMyObject.Create; is undefined and not necessarily nil. Variables are not initialized by default and can contain anything. In general, MyObject.Free does not set MyObject to nil neither. Good practice is to initialize pointer variables to nil and resetting them to nil after freeing them whenever assigned() or <>nil is going to be used. Ludo _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
