“Left side cannot be assigned to” for record type properties in Delphi

Question

I\'m curious to know why Delphi treats record type properties as read only:

  TRec = record
    A : integer;
    B : string;
  end;

  TForm1 = class(TForm)
         


        

Answer 1

The simplest approach is:

procedure TForm1.DoSomething(ARec: TRec);
begin
  with Rec do
    A := ARec.A;
end;