Re: [fpc-pascal] Generics

[Damien Gerard]

Le Mar 31, 2008 à 3:59 PM, ik a écrit :

Can you create a small proof of concept, and attach it here ?

Here you are.

The unit is in development so it may remain some errors (I would like to convert another units with the use of generics). BTW, is there a way to specifiy the template parameter must be a descendant of another class ?

Ido

On Mon, Mar 31, 2008 at 4:27 PM, Damien Gerard <[EMAIL PROTECTED]> wrote:

Le Mar 31, 2008 à 3:00 PM, Damien Gerard a écrit :

I would like to make a generic class, like this :

{$mode objfpc}

generic TMCollection<_T> = class(TObject)
private
  FDefaultItem: _T;  // line 35
public
  constructor Create;
  destructor Destroy;override;
  [...]
end;


But I have got the following :
commons.pas(35,21) Error: Identifier not found "_T"
commons.pas(35,21) Error: Error in type definition
commons.pas(39,34) Error: Identifier not found "_T"
commons.pas(44,84) Error: Identifier not found "_T"

According to the documentation, I should use `var private`, but I
have got :

Compiling ./commons.pas
commons.pas(33,3) Error: VAR and TYPE are allowed only in generics
commons.pas(35,21) Error: Identifier not found "_T"

Could someone tell me where I am wrong ?
Thanks !

I forgot : fpc 2.2.0 and fpc 2.2.1. May be I should upgrade to 2.3.x ?

foo.pas
Description: Binary data

--
Damien Gerard
[EMAIL PROTECTED]

"Intelligence is 10 million rules."
   -- Douglas Lenat






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