const s: String(1000) passed by value?

26 Jul 2005

      It seems that const parameters of string types are passed by value, eg:

program peterT4;

   type
     Str = String(1000);

   var
     gs: Str;

   procedure Doit( const s: Str );
   begin
     if @s = @gs then begin
       WriteLn( 'OK' );
     end else begin
       WriteLn( 'failed' );
     end;
   end;

begin
   Doit( gs );
end.

fails.

I checked the code and it definitely looks like it is doing a copy.

I use a lot of long strings (2500) and so this seems like a serious 
problem to me...

Thanks,
    Peter.

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const s: String(1000) passed by value?

Peter N Lewis