Re: [fpc-pascal] Generic TFPGList gives me compiler error: Operator is not overloaded

[Sven Barth]

On 17.09.2013 14:52, Dennis Poon wrote:

I have this:
uses fgl;

Type
   RScene=record
     ID : Word;
     Name, Category : String;
   end;

   TSceneList=specialize TFPGList<RScene>;


The error is:  Operator is not overloaded: "RScene" = "RScene"


I suppose the generic thing does not know how to compare 2 records.
How do I solve that?

Provide a "=" operator overload for the record:

=== code begin ===

uses fgl;

{$modeswitch advanced_records}

Type
   RScene=record
     ID : Word;
     Name, Category : String;
     class operator = (aLeft, aRight: RScene): Boolean;
   end;

   TSceneList=specialize TFPGList<RScene>;

class operator RScene.=(aLeft, aRight: RScene): Boolean;
begin
  ...
end;

=== code end ===

Regards,
Sven
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