Re: Implementing interface method with child class in parameter def (Bug #42330)

Christian Stoller wrote (on 17/09/2014):

I'd say that it is absolutely legal to define a more specialized type in a child or implementing class, or would this have any bad side effects?

Here is a StackOverflow question discussing exactly this issue, which includes why you can't do that with an interface contract, and some suggestions on what you might want to do instead: http://stackoverflow.com/q/21665795/157957 -- Rowan Collins [IMSoP]