I know a property read/write to a member of a record, if that record is a field of the class.

I tested the following code, it seems fpc also allows that for classes.

type
  TFoo = class
  protected
    cn: Integer;
  end;

  TForm1 = class(TForm)
  private
    a:TFoo;
  public
    property b: Integer read a.cn write a.cn;
  end;

I have not tested it at runtime.... I assume it depend on a being initialized with an instance.

Question, is that allowed by intention? That is can I trust that it will be supported by future fpc versions?

Or is that a missing check somewhere, and bay stop working in future?
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