[fpc-pascal] Pointer question

[Sven Barth]

Hairy Pixels via fpc-pascal <fpc-pascal at lists.freepascal.org> schrieb am
Do., 10. Aug. 2023, 18:30:

>
>
> > On Aug 10, 2023, at 5:43 AM, Bernd Oppolzer via fpc-pascal <
> fpc-pascal at lists.freepascal.org> wrote:
> >
> > PTRADD (p, i) - p is type ANYPTR, i is integer, result is of type ANYPTR
> > PTRDIFF (p1, p2) - two pointers, the result is integer
> > ANYPTR is a predefined type, compatible with every (typed pointer)
> > ADDR (x) is a function (borrowed from PL/1), which returns an ANYPTR ...
> and it is allowed for all types of variables
> > PTRCAST is the same as PTRADD (p, 0) - and is used to cast pointers
> between incompatible pointers (not type safe)
> >
>
> Not a bad idea to clarify this. Besides p + 1 the pointer math operators
> are difficult to understand and feel antiquated.
>

Then you simply aren't using them often enough. E.g. the RTTI internal code
is full of them and additional typecasts would simply muddle up otherwise
relatively clear code.

Regards,
Sven

>
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