opApply not called for foeach(container)

[Mehrdad]

On Sunday, 15 July 2012 at 20:01:35 UTC, Jonathan M Davis wrote:
> Ideally, we wouldn't even need opApply anymore

AFAIT, that's impossible.

Not because of D, but because of other stuff.

Lots of functions require callbacks for enumeration (e.g. 
EnumChildWindows in Windows); it's simply impossible to wrap them 
through something that doesn't take control away from the caller.