Forward ranges in Phobos v2

[Adam D Ruppe]

On Tuesday, 2 November 2021 at 18:09:55 UTC, H. S. Teoh wrote:
> Why is this necessary?  I thought we're getting rid of 
> std.range.interfaces.

It is actually really, really, useful. If phobos didn't offer it, 
someone would reinvent it anyway.

(In fact, there's a lot of cases where using them is more 
efficient than generating more and more code...)