Is there a known edge case issue connected to setting the length
of dynamic arrays?
I have a program that simulates a billiards game, and during the rerack
balls method of TPoolTable the number of pool balls on the table varies
based on the rerack option used. Currently, I am having a problem wher
On 2022-09-08 09:30, Anthony Walter via fpc-pascal wrote:
Is there a known edge case issue connected to setting the length of
dynamic arrays?
No, and the location where you're getting the crash suggests an issue in
your program that has corrupted the heap manager state.
Jonas
_
I suggest trying without optimisations and/or using cmem, to see if that
changes the outcome.
Also, if the array is corrupted prior to the setlength, then iterating the
array with a trivial
with... Writeln(Color)
or whatever, should trigger an exception.
That could then be used at various pa
Please ignore this post. I fixed the issue.
___
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
On 9/8/22 9:54 AM, Anthony Walter via fpc-pascal wrote:
Please ignore this post. I fixed the issue.
curious minds want to know: what was the fix?
--
NOTE: No off-list assistance is given without prior approval.
*Please keep mailing list traffic on the list where it belongs!*
_
> curious minds want to know: what was the fix?
In a separate part of the pool table initialization, I was precalculating
the midpoints and normals for bumper rails. I had carelessly written this
code:
for I := 0 to Length(Rails) do
RailInit(Rails[I], I);
___
A function reference can call a class method but can you get the TMethod data
from function references? It was possible with “is object” to cast to TMethod
but that doesn’t seem to be possible with references.
=
type
TMyClass = class
constructor Create;
procedure DoThis;
end
On Thu, 8 Sep 2022, Hairy Pixels via fpc-pascal wrote:
A function reference can call a class method but can you get the TMethod data
from function references? It was possible with “is object” to cast to TMethod
but that doesn’t seem to be possible with references.
=
type
TMyClass
> On Sep 8, 2022, at 9:09 AM, Michael Van Canneyt
> wrote:
>
> To me it seems logical that you cannot do this, since a function reference is
> actually an
> interface, and there is no actual object to back it up.
>
> Your function reference could also be a regular procedure (no data at all)
On Thu, 8 Sep 2022, Hairy Pixels via fpc-pascal wrote:
On Sep 8, 2022, at 9:09 AM, Michael Van Canneyt wrote:
To me it seems logical that you cannot do this, since a function reference is
actually an
interface, and there is no actual object to back it up.
Your function reference could
> On Sep 8, 2022, at 11:14 AM, Michael Van Canneyt via fpc-pascal
> wrote:
>
> It must keep this information somewhere, but this does not mean you can
> typecast it to a TMethod.
Indeed. I wonder if this information could be exposed by some method in the
interface? It would be useful to int
Curious more than anything, if is nested captures state in a record and passes
it as an hidden self param, why does returning the variable and calling from
outside the calling stack frame corrupt the data? It seems like it technically
should be there.
==
type
TProc = procedur
12 matches
Mail list logo
