Re: [fpc-pascal] Firebird vs. SQLite vs. PosgreSQL
> I've read the Firebird webpage and installed it but I can't seem to > find documentation on how it compares to SQLite and PostgreSQL. My > high level understanding is that it sits somewhere it between but I'm > looking for more in depth comparisons on performance, data integrity > tests and maybe even some real world experience anecdotes (+ive and > -ive) on deployment, maintenance etc. For use with fpc you have to look at the available interfacing libraries - in most cases you should use some object-definitions covering the plain-C-language API. For short: * FirebirdSQL and PostgreSQL are both fully featured Client-Server databases. At Least FirebirdSQL does have an embedded mode to avoid server. * SQLite is an embedded library with less features and smaller in size. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Constants in generics
On 06/11/2018 08:13, Ryan Joseph wrote:
I implemented a first draft of constants (integers) in generics. My reason was
specifically that I wanted a way to add methods to static arrays and generic
records is the only way to accomplish this AFAIK.
If I fix this up will it be considered as a patch? I wanted to present the idea
first before I spent any more time. Here’s what I has so far (on GitHub).
Just for info, there already is a way to do this, though being able to
do it direct would be nice. You can wrap any constants into an object
(or advanced record).
program Project1;
{$mode objfpc}{$H+}
uses Classes;
type
generic Foo = object
class procedure test;
end;
Data = object
const val = 1;
end;
var
bar: specialize Foo;
class procedure Foo.test;
begin
writeln(A.val);
end;
begin
bar.test;
readln;
end.
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Re: [fpc-pascal] Constants in generics
Does this trick also work for declaring arrays using "val"? BR, Denis ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Dynamic array bug
On Wed, Nov 7, 2018 at 3:39 AM Ryan Joseph wrote: > Good to know. I reported this before and Sven said it was fixed in an > update (after another user had submitted the original patch). > > Are you able to get a := a + [4]; to work? I’m looking Sven’s old message > titled "Feature announcement: Dynamic array extensions” and he says + > operator now works. Yes, it works. But only on Delphi: a := a + [4]; writeln(a[3]); // prints 4 -- Silvio Clécio ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Dynamic array bug
> On Nov 7, 2018, at 9:31 PM, silvioprog wrote: > > Yes, it works. But only on Delphi: > That’s too bad, I don’t use Delphi mode. Should be in Objfpc mode also right? Regards, Ryan Joseph ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Dynamic array bug
On Wed, Nov 7, 2018 at 12:09 PM Ryan Joseph wrote: > > > On Nov 7, 2018, at 9:31 PM, silvioprog wrote: > > > > Yes, it works. But only on Delphi: > > > > That’s too bad, I don’t use Delphi mode. Should be in Objfpc mode also > right? Oops... I meant "in Delphi compiler". ^^' Anyway, it doesn't compile in FPC (tested in both delphi and objfpc modes). -- Silvio Clécio ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Dynamic array bug
> On Nov 8, 2018, at 8:35 AM, Ryan Joseph wrote: > > Do you want me to file a new bug report for := operators? I just filed a report just in case. https://bugs.freepascal.org/view.php?id=34526 Regards, Ryan Joseph ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Dynamic array bug
> On Nov 7, 2018, at 10:12 PM, silvioprog wrote:
>
> Anyway, it doesn't compile in FPC (tested in both delphi and objfpc modes).
>
I read the old thread and we need to add {$modeswitch arrayoperators} to make
it work. a += [4] does work now.
Also I found the thread where Sven said he fixed the "Incompatible types: got
"Set Of Byte” bug in r39554 (https://bugs.freepascal.org/view.php?id=34021). It
is indeed fixed but only for + operators.
Do you want me to file a new bug report for := operators?
Regards,
Ryan Joseph
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Re: [fpc-pascal] Dynamic array bug
On Wed, Nov 7, 2018 at 11:06 PM Ryan Joseph
wrote:
> I read the old thread and we need to add {$modeswitch arrayoperators} to
> make it work. a += [4] does work now.
>
> Also I found the thread where Sven said he fixed the "Incompatible types:
> got "Set Of Byte” bug in r39554 (
> https://bugs.freepascal.org/view.php?id=34021). It is indeed fixed but
> only for + operators.
>
> Do you want me to file a new bug report for := operators?
You can temporary solve it by specializing a generic array:
program project1;
{$mode objfpc}{$H+}
{$modeswitch advancedrecords}
{$modeswitch arrayoperators}
uses sysutils;
type
TIntArray = specialize TArray;
TMyRec = record
a: TIntArray;
class operator := (right: TIntArray): TMyRec;
end;
class operator TMyRec.:= (right: TIntArray): TMyRec;
begin
result.a := right;
end;
var
r: TMyRec;
a: TIntArray;
begin
r := specialize TArray.Create(1, 2, 3);
a := [1, 2, 3];
a += [4];
end.
--
Silvio Clécio
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Re: [fpc-pascal] Dynamic array bug
On Thu, Nov 8, 2018 at 1:13 AM silvioprog wrote:
> On Wed, Nov 7, 2018 at 11:06 PM Ryan Joseph
> wrote:
>
>> I read the old thread and we need to add {$modeswitch arrayoperators} to
>> make it work. a += [4] does work now.
>>
>> Also I found the thread where Sven said he fixed the "Incompatible types:
>> got "Set Of Byte” bug in r39554 (
>> https://bugs.freepascal.org/view.php?id=34021). It is indeed fixed but
>> only for + operators.
>>
>> Do you want me to file a new bug report for := operators?
>
>
> You can temporary solve it by specializing a generic array:
>
... or forcing the compiler to get the correct type by cast:
type
TIntArray = array of integer;
...
var
r: TMyRec;
begin
r := TIntArray([1, 2, 3]);
...
--
Silvio Clécio
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