Type casting integers as pointers

[LucieLastic]

hi

Is there a maximum integer I can safely typecast as a pointer or does it not matter?

I'm storing ids (currently 1 - 3500) in a TList as mylist.add(pointer(id)). I was just a bit worried in case I hit addresses that were being used by other apps.

lou

 

[towerbase]

I don't think it matters. Typecasting doesn't usually generate any code. The compiler doesn't generate instructions to see if the pointer is an invalid address.

However, I don't think this is a good use of TList. Whilst it will work, this kind of coding has a habit of coming back and biting you hard when you need to modify your program at some future date.

I would guess you need to use/write a class for holding these ids or possibly use a dynamic array.

Andrew

 

[LucieLastic]

hi Andrew

You're probably right, I'll change it to 'array of integer'. I'm just a bit of a fan of TLists and didn't give it much thought

lou