[fpc-pascal] 3.0.0 for 3.0.3

2017-03-02 Thread Mattias Gaertner 
Hi,

Why do I need fpc 3.0.0 to build 3.0.3?
Shouldn't that be 3.0.2?

Mattias
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Re: [fpc-pascal] $IFDEF with multiple symbols?

2017-03-02 Thread Jonas Maebe 

On 02/03/17 20:39, Bo Berglund wrote:

Can I use this to make a conditional compilation?

{$IFDEF charlie, oscar}
  main,
{$ENDIF}

Where I want main to be included if one or both of charlie and oscar
are defined symbols.
So in effect the condition triggering main would be charlie OR oscar..


{$if defined(charlie) or defined(oscar)}
main,
{$endif}


Jonas
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[fpc-pascal] $IFDEF with multiple symbols?

2017-03-02 Thread Bo Berglund 
Can I use this to make a conditional compilation?

{$IFDEF charlie, oscar}
  main,
{$ENDIF}

Where I want main to be included if one or both of charlie and oscar
are defined symbols.
So in effect the condition triggering main would be charlie OR oscar..

If not then how else should I include main in the charlie or oscar
case but not if both are undefined?

The problem comes from making some units shared between different
projects...


-- 
Bo Berglund
Developer in Sweden

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Re: [fpc-pascal] FPC 3.0.2 released!

2017-03-02 Thread Jonas Maebe 

On 01/03/17 23:38, Bo Berglund wrote:

On Wed, 1 Mar 2017 22:04:26 +0100, Jonas Maebe
 wrote:


On 01/03/17 21:55, Bo Berglund wrote:

Am I still supposed to use 2.6.4 as compiler to build 3.0.2?
I am getting an error about the "seed" compiler when I try to build
3.0.2 with a 3.x compiler


You have to build it with the previous release, i.e. 3.0.0


The error message I received talked about a requirement for 2.6.4
But I pointed make towards a 3.0.0 ppcarm and it did the build OK.


I don't know how that is possible with the official 3.0.2 release 
sources, since that Makefile does not mention 2.6.4: 
http://svn.freepascal.org/svn/fpc/tags/release_3_0_2/Makefile.fpc



Jonas
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Re: [fpc-pascal] Array of const and generics

2017-03-02 Thread Sven Barth 
Am 02.03.2017 14:17 schrieb "Ryan Joseph" :
>
>
> > On Mar 2, 2017, at 5:45 PM, Sven Barth 
wrote:
> >
> > "array of const" itself should work without problems though mixing the
type parameters and the values contained in the array might be problematic
(I'd need to test it myself).
>
> It doesn’t work from my tests.

When I'll have the time I'll check whether it's correct that it doesn't
work or not...

> > However for your specific example case why don't you use "array of T"
as a parameter type for the constructor. It would work the same, but would
be even more type safe and in the spirit of generics.
>
> I didn’t even know you could pass a dynamic array as a parameter so I was
always using array of const. Thanks, learning more new things again!

It's not a dynamic array, but an open array, that's an important
difference. You (currently) can't pass a an array constructor ("[...]") to
a dynamic array parameter (that will change once we support such array
constructors like Delphi does). Check the language reference guide for more
details.

Regards,
Sven
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Re: [fpc-pascal] Array of const and generics

2017-03-02 Thread Ryan Joseph 

> On Mar 2, 2017, at 5:45 PM, Sven Barth  wrote:
> 
> "array of const" itself should work without problems though mixing the type 
> parameters and the values contained in the array might be problematic (I'd 
> need to test it myself).

It doesn’t work from my tests.

> However for your specific example case why don't you use "array of T" as a 
> parameter type for the constructor. It would work the same, but would be even 
> more type safe and in the spirit of generics.

I didn’t even know you could pass a dynamic array as a parameter so I was 
always using array of const. Thanks, learning more new things again!

Regards,
Ryan Joseph

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Re: [fpc-pascal] Array of const and generics

2017-03-02 Thread Sven Barth 
Am 02.03.2017 10:42 schrieb "Ryan Joseph" :
>
> Is it possible to use array of const inside of generics?
>
>
> Quick example I just typed up. If you specialize the generic the compiler
always complains about the type in array of const not being the specialized
type. Type casting doesn’t work either because you may have specialized for
incompatible types like classes and strings. It would be nice to say:
TIntegerCollection.Create([1, 3, 4, 8, 10]) as a way to init the instance.

"array of const" itself should work without problems though mixing the type
parameters and the values contained in the array might be problematic (I'd
need to test it myself).
However for your specific example case why don't you use "array of T" as a
parameter type for the constructor. It would work the same, but would be
even more type safe and in the spirit of generics.

Regards,
Sven
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[fpc-pascal] Array of const and generics

2017-03-02 Thread Ryan Joseph 
Is it possible to use array of const inside of generics?


Quick example I just typed up. If you specialize the generic the compiler 
always complains about the type in array of const not being the specialized 
type. Type casting doesn’t work either because you may have specialized for 
incompatible types like classes and strings. It would be nice to say: 
TIntegerCollection.Create([1, 3, 4, 8, 10]) as a way to init the instance.

type
  generic TCollection = class (TObject)
constructor Create (args: array of const);  
procedure Add (a: T);
  end;
  TIntegerCollection = specialize TCollection;


constructor TCollection.Create (args: array of const);
begin
  // ERROR: args[0] is not the type we specialized for. can’t typecast either.
  if args[0].vtype = vtinteger then
Add(T(args[0].vinteger));
end;

procedure TCollection.Add (a: T);
begin
  
end;

Regards,
Ryan Joseph

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