[fpc-pascal] Re: Use generic class as parameter (was: how to write enumerator for trees)

[Sven Barth]

On 23.03.2013 14:51, Xiangrong Fang wrote:
> I got this error now:
>
> treap.pas(311,48) Error: Illegal expression
> treap.pas(311,50) Error: Illegal expression
> treap.pas(311,50) Fatal: Syntax error, ";" expected but "ordinal const"
> found
> Fatal: Compilation aborted
>
> The line that generated this error is:
>
>    if Result = NullNode then begin
> if (Rank = 0) or (Anchor < Key) then Rank += 1;   <-- error here
>      Result := nil;
>    end;
>
> It seems that the += operator is not supported anymore??  Is there any
> switches in the new 2.7.1?

The C style operators need to be enabled using a switch which is AFAIK 
either normally done in the fpc.cfg or by Lazarus. Nevertheless the 
command line switch you need is "-Sc".

Regards,
Sven