I try to write a kind of object/record serializer with Delphi 2010 and wonder if there is a way to detect, if a record is a variant record. E.g. the TRect record as defined in Types.pas:

TRect = record
case Integer of
  0: (Left, Top, Right, Bottom: Longint);
  1: (TopLeft, BottomRight: TPoint);
end; 

As my serializer should work recursively on my data structures, it will descent on the TPoint records and generate redundant information in my serialized file. Is there a way to avoid this, by getting detailed information on the record?