The ability to define new generic types in Boo.
Cannot emit generator methods whose yield type is a generic parameter
Anonymous callable types fail when signature contains generic parameters
Declaring constraints on generic type parameters
Current grammar doesn't support defining generic types.
Grammar/parser must be updated before the type system and the emitter parts can be implemented.
Updated title and description.
Started working on this, and generally giving the whole generics section of the type system some lovin' (and possibly its own namespace).
It's gonna be sweet!