[sv-ec] Interface Class items up for clarification next Monday

Hi Mehdi,

Next Monday, please note that these issues need to be discussed on Interface classes to make further progress:

* Related mantis items opened by Gord - 3278 & 3279

* Interface Class (IC) type usage restrictions:

o Is an IC a 'first class type'?

o Can you have a type parameter as part of something you are using?

class Fifo #(type T = PutImp) implements T;
virtual class Fifo #(type T = PutImp) implements T
interface class Fifo #(type T = PutImp) implements T;

o Is forward typedef'ing allowed or needed for IC's

* No nested IC's are allowed - Does everyone agree?

* Casting of IC types - what happens when the source type is null? Legal, illegal, or restrictions?

* Diamond Default Method - Clarification is needed by the committee on which default is chosen in the case of a diamond inheritance. Do they have to match exactly down both paths, do they have to use constants, or do we choose the implemented default?

Thanks, -Tom

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