Turn .opApply into ranges

[Stefan Koch via Digitalmars-d]

On Tuesday, 9 May 2017 at 17:23:36 UTC, Yuxuan Shui wrote:
> I wondered if I can turn struct that defines opApply into 
> ranges.
>
> And it turns out to be surprisingly easy:
>
> https://gist.github.com/yshui/716cfe987c89997760cabc2c951ca430
>
> Maybe we can phase out opApply support in foreach? ;)
>
> BTW, is there a way to get the "element type" from .opApply?

This "conversion" relies on fibers which need heavy runtime 
support.
So no, opApply still has it's place.