[fpc-pascal] Generic syntax that compiles with FPC 2.4.4 but not with FPC 2.6.0-0.rc1

[Jonas Maebe]

On 23 Nov 2011, at 23:01, Juha Manninen wrote:

> The following does not compile any more with FPC 2.6.0-0.rc1.
> ---
>  generic TGen<_T> = class
>    type public
>      T_TArray = array of _T;
>    var private
>      w: T_TArray;
>    public
>      constructor Create(Value: _T);
>  end;
> 
>  TSpecial = specialize TGen<integer>;
> ---
> 
> At line:
>      T_TArray = array of _T;
> it says:
>  unit1.pas(31,16) Fatal: Syntax error, ":" expected but "=" found
> 
> It is either a regression bug in FPC 2.6.0 or a bug in FPC 2.4.4 that got
> fixed.
> Which one is it?

It's related to this: http://wiki.freepascal.org/FPC_New_Features_2.6.0#Better_support_for_Delphi-compatible_classes

The syntax is now:

type
 generic TGen<_T> = class
   public type
     T_TArray = array of _T;
   private var
     w: T_TArray;
   public
     constructor Create(Value: _T);
 end;

 TSpecial = specialize TGen<integer>;

I.e., type, var etc are now inside public/private/protected sections, rather than that you have public/private/protected sections inside type/var blocks (Delphi-compatible and more logical). It should be added to User_Changes_2.6.0 though.


Jonas