Free Pascal - General mailing list wrote
> Is it possible to achieve this dynamically without resorting to type
> casting? It feels like classes should have a builtin type for each class,
> like TClassType, which similar to TObject.ClassType but is a compile time
> type.
I didn't think enough befo
Hi Ryan,
It's possible. Just change your declaration of `c`:
var c: TBase;
It still prints TMyClass at the end.
Of course, you're only going to have access to methods that are declared in
TBase.
You can also approach this sort of thing with interfaces...
-Michal ( http://tangentstorm.com/ )
> On Mar 24, 2020, at 8:39 PM, Michal Wallace via fpc-pascal
> wrote:
>
> Hi Ryan,
>
> It's possible. Just change your declaration of `c`:
>
> var c: TBase;
>
> It still prints TMyClass at the end.
>
> Of course, you're only going to have access to methods that are declared in
> TBase.
>
Hello.
According to:
https://wiki.freepascal.org/Turn_warnings_and_hints_on_or_off
> Control specific warnings:
> Add
> {$warn off}
> just after the unit name.
So doing this:
> unit myunit;
> {$warn 6060 off}
Still gives some "Warning: (6060) Case statement does not handle all
pos
On 3/23/20 8:08 PM, fredvs via fpc-pascal wrote:
const
foldhiddenbit = 7;
foldhiddenmask = 1 shl foldhiddenbit;
currentfoldhiddenbit = 6;
currentfoldhiddenmask = 1 shl currentfoldhiddenbit;
foldlevelmask = byte(not (foldhiddenmask or currentfoldhiddenmask));
>Here the warning
I
Yes, those constants are defaulting to integer, which can represent both
negative and positive values. When you do your shl you're inadvertently causing
them to go into the range that pascal thinks is negative.
The typed constant should fix it.
--
Alexander Grotewohl
https://dcclost.com
___
Hello WKitty.
foldhiddenmask : byte = 1 shl foldhiddenbit;
currentfoldhiddenmask : byte = 1 shl currentfoldhiddenbit;
foldlevelmask : byte = not (foldhiddenmask or currentfoldhiddenmask);
=
msedatalist.pas(897,47) Error: (3203) Illegal expression
msedatalist.pas(899,61) Error: (32
just to be clear.. you did do foldhiddenbit: byte = 7, etc?
--
Alexander Grotewohl
https://dcclost.com
From: fpc-pascal on behalf of fredvs
via fpc-pascal
Sent: Tuesday, March 24, 2020 12:22:10 PM
To: fpc-pascal@lists.freepascal.org
Cc: fredvs
Subject: Re: [f
Hello Alexander.
I did:
const
foldhiddenbit : byte = 7; // line 896
foldhiddenmask : byte = 1 shl foldhiddenbit; // line 897
currentfoldhiddenbit : byte = 6; // line 898
currentfoldhiddenmask : byte = 1 shl currentfoldhiddenbit; // line 899
foldlevelmask : byte = not (foldhiddenmas
And only changing this:
> foldhiddenbit: byte = 7;
Gives also a error message on next line unchanged:
> foldhiddenmask = 1 shl foldhiddenbit; // raise a error on that line.
Error: (3203) Illegal expression
Fre;D
-
Many thanks ;-)
--
Sent from: http://free-pascal-general.1045716.n5.nabbl
And doing this:
foldhiddenbit = byte(7);
foldhiddenmask = byte(1 shl foldhiddenbit);
currentfoldhiddenbit = byte(6);
currentfoldhiddenmask = byte(1 shl currentfoldhiddenbit);
foldlevelmask = abs(byte(not (foldhiddenmask or currentfoldhiddenmask)));
// line 891
Gives also a warning:
msedatali
This make the compiler happy:
foldlevelmask = byte(abs(not (foldhiddenmask or currentfoldhiddenmask)));
Not sure it is better to do abs() but so no more warning.
Let's fix with it?
-
Many thanks ;-)
--
Sent from: http://free-pascal-general.1045716.n5.nabble.com/
__
On Tue, Mar 24, 2020 at 6:00 PM fredvs via fpc-pascal
wrote:
> OK, I stop.
This works?
{$mode objfpc}
{$apptype console}
const
foldhiddenbit = byte(7);
foldhiddenmask = byte(1 shl foldhiddenbit);
currentfoldhiddenbit = byte(6);
currentfoldhiddenmask = byte(1 shl currentfoldhiddenbit);
On 3/24/20 12:40 PM, fredvs via fpc-pascal wrote:
Hello Alexander.
I did:
const
foldhiddenbit : byte = 7; // line 896
foldhiddenmask : byte = 1 shl foldhiddenbit; // line 897
currentfoldhiddenbit : byte = 6; // line 898
currentfoldhiddenmask : byte = 1 shl currentfoldhiddenbit;
> what mode are you compiling with?
{$mode objfpc}{$h+}
-
Many thanks ;-)
--
Sent from: http://free-pascal-general.1045716.n5.nabble.com/
___
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
https://lists.freepascal.org/cgi-bin/mailman/list
perhaps calculate those results by hand and assign them.. then fix it later?
hehe
--
Alexander Grotewohl
https://dcclost.com
From: fpc-pascal on behalf of fredvs
via fpc-pascal
Sent: Tuesday, March 24, 2020 1:53:19 PM
To: fpc-pascal@lists.freepascal.org
Cc: f
> perhaps calculate those results by hand and assign them.. then fix it
later? hehe
Yes, that is the thing with the gurus, it must seem complicated.
I agree that writing this:
> foldlevelmask = byte(not (foldhiddenmask or currentfoldhiddenmask));
is much more impressive than writing this:
> f
what about
foldlevelmask = (not (foldhiddenmask or currentfoldhiddenmask)) and $ff ;
instead of the " f... := byte(...) " line
?
- Original Message -
From: "fredvs via fpc-pascal"
To:
Cc: "fredvs"
Sent: Tuesday, March 24, 2020 1:08 AM
Subject: [fpc-pascal] Range check error warn
> what about
> foldlevelmask = (not (foldhiddenmask or currentfoldhiddenmask)) and $ff ;
Ha, this one fpc 3.3.1 like it!
No more warning nor error.
May I ask you what "and $ff" does, is it the same as "abs()" or keep it the
negative value?
Many thanks.
Fre;D
-
Many thanks ;-)
--
Sent
z := x AND y is a bitwise AND
(not (foldhiddenmask or currentfoldhiddenmask))
results in
dec: -193hex: ff3f bin: 0011
this AND hex: $ff (bin: 1 ) gives
bin: 0011
AND
bin:
Many thanks Gerhald.
Now I have to deeply study your code, I did not catch all at first glance.
Write you later.
Fre;D
-
Many thanks ;-)
--
Sent from: http://free-pascal-general.1045716.n5.nabble.com/
___
fpc-pascal maillist - fpc-pascal@list
schrieb am Di., 24. März 2020, 18:37:
> On 3/24/20 12:40 PM, fredvs via fpc-pascal wrote:
> > Hello Alexander.
> >
> > I did:
> >
> > const
> > foldhiddenbit : byte = 7; // line 896
> > foldhiddenmask : byte = 1 shl foldhiddenbit; // line 897
> > currentfoldhiddenbit : byte = 6; // li
Am 24.03.2020 um 01:08 schrieb fredvs via fpc-pascal:
Hello.
With fpc 3.3.1 there is this warning:
"Warning: (4110) Range check error while evaluating constants (-193 must be
between 0 and 255)"
Here the code pointed by the warning:
const
foldhiddenbit = 7;
foldhiddenmask = 1 shl foldhidd
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