On Mon, 1 Oct 2012, Reinier Olislagers wrote:
On 1-10-2012 13:55, dhkblaszyk-47ckw973qwsgtviba+r...@public.gmane.org
wrote:
On 1 okt '12, michael.vancanneyt-0is9kj9s...@public.gmane.org wrote:
On Mon, 1 Oct 2012, dhkblas...@zeelandnet.nl
<mailto:dhkblaszyk-47ckw973qwsgtviba+r...@public.gmane.org>wrote:
Hi Tomas, Thanks for clarifying. I will use PtrUInt to store the
pointer address in. BTW: the documentation it says not to use PtrInt
because it's signed and therefore smaller than a pointer (as in max
value). Also there seems to be an error in the documentation. On
http://www.freepascal.org/docs-html/rtl/system/ptruint.html [4] it is
described that PtrUInt is an alias to DWord. However, it depends on
the architecture which type it actually is. Could someone please
correct the docs?
What do you want to see corrected ?
On 32-bit systems, it is a DWord. The docs were generated on such a system,
so you get this definition.
If possible I would like to see a remark mentioning that it's a QWord on
64bit and Word on 16bit. That by itself would make thing clearer already.
That sounds good (vaguely remember that PtrUint also depends on OS, but
leaving it to more knowledgeable people to updat the docs anyway)
In the ideal case fpdoc should be adjusted so it can handle these
defines. However this will be very complex I assume.
IIUC, size PtrUint varies by architecture, which is more or less the
point of PtrUint.
Having this variation documented as Darius suggested above makes things
much clearer, because the programmer may be working on one platform and
programming for another (with {$IFDEFS}...).
Yes and no.
You're supposed to treat this as an opaque type, i.e. all you're supposed to
know is that it is:
1) An integer type (signed or not).
2) Same size as a pointer type on all platforms.
If we start specifying when it is of what type, then
a) we need to maintain this.
b) people will start making assumptions.
We exactly need to avoid b)
Michael.
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