Re: [Vala] Implement abstract interface method in interface

[Jim Nelson <jim yorba org>]

Your problem lies here:

interface IBar : IFoo 
{ 
public virtual void bar () 
{ 
} 
} 

Because IBar is an interface, it doesn't inherit from IFoo.  Rather, in Vala that syntax means whatever class 
implements IBar's interface must also implement IFoo (or, IFoo is a prerequisite interface for IBar).  For 
whatever reason, although interfaces may implement code, in Vala an interface cannot implement a 
prerequisite's methods.

I don't know the exact reason why.  I suspect it's a limitation of GObject and not Vala.

I discuss interfaces on the Yorba blog: 
http://blog.yorba.org/jim/2011/11/a-few-of-my-favorite-vala-things-interface.html

-- Jim