Revised RFC on range design for D2

[Sergey Gromov]

Ary Borenszweig <ary at esperanto.org.ar> wrote:
> Two questions:
> - Is it possible to add elements to a range? Suppose a linked list, you 
> want to traverse it's elements until a condition is met on an element, 
> and then add something after it. Or before it. I see there's "put", but 
> it also says "An output range models a one-pass forward writing 
> iteration.", so I think it's not the same.
> - The same question applies if you want to delete an element from a range.

The idea is that a container is responsible for mutators, not range.  
Therefore you'd have list.insertBefore(range, value).  Likewise there'd 
be list.remove(range), list.removeBefore(range) and list.removeFirst
(range).