[fpc-devel] bug: Inc(v,i)/Dec(v,i)

[Gerhard Scholz]

...
> > var
> >   v : cardinal;
> > begin
> >   v:=100;
> >   inc(v,-1);
> > end.
> >
> > The reason is that -1 is in fact an addition of $ffffffff resulting in the
> > carry flag being set and therefor an overflow.
>
> For cardinal IMHO not-a-bug?

I think it's a bug for cardinals and other unsigned ints also (as long as the
result is in the range of the result variable)