Is it possible to use TTranslateStrings = type TStrings? I ask because, the compiler allows it, but stops later with only this message:
lcl/interfaces/gtk2/interfaces.pas(1,1) Fatal: Compilation aborted

Question:
Is it allowed to use
NewClass = type SomeClass;
?

Mattias

In theory yes, in pratice it seems to be buggy :)

Reason is probably http://www.freepascal.org/mantis/view.php?id=8180

Thanks for the quick response.

Mattias

Also delphi handles things strange. The following code is from webtbf/tw3930a.pp. The code looks correct, but delphi fails with "Incompatible types: 'TMyStringList' and 'TStringList'". That makes typed classes not very usefull unless you override all constructors.

uses
   Classes;
type
   TMyStringList = type TStringlist;
var
   list : TMyStringList;
begin
   list:=TMyStringList.Create;
end.

Peter

Peter Vreman wrote

Also delphi handles things strange. The following code is from webtbf/tw3930a.pp. The code looks correct, but delphi fails with "Incompatible types: 'TMyStringList' and 'TStringList'". That makes typed classes not very usefull unless you override all constructors.

Sounds like they define the result type of a constructor at constructor definition time. Strange then that inherited constructors do work ?

Micha

It might sound strange, but this 'incompatible types' is good.

I need it only for RTTI. A TMyStringList will never be created. Basically I need

type
  TTranslateStringsText = type TStrings;
  TMyComponent = class(TPersistent)
    ...
  published
    property Items: TTranslateStringsText read ... write ...;
  end;

The implementation will always use TStrings, not TTranslateStringsText. Only the RTTI information should show TTranslateStringsText. Especially this must work:

  Items:=TStringList.Create;

BTW, I don't know what other sense is in 'type someclass'. Maybe Borland thought the same.

Mattias