http://wiki.dlang.org/DIP69
Despite its length, this is a fairly simple proposal. It adds the missing semantics for the 'scope' storage class in order to make it possible to pass a reference to a function without it being possible for it to escape.
This, among other things, makes a ref counting type practical. It also makes it more practical to use other storage allocation schemes than garbage collection.
It does not make scope into a type constructor, nor a general type-annotation system.
It does not provide an ownership system, though it would complement one.
