[Vala] Delegate that returns its own type

["Zsolt Börcsök" <zsolt borcsok gmail com>]

Hi,

In C# following declaration is valid (defining delegate that returns its own type):
  public delegate delegateType delegateType();

But, in Vala it results compilation error... Is it going to be supported? 
If not, do you have any suggestion to replace this kind of declaration.

 Thanks.