opApply outside of struct/class scope

[Era Scarecrow via Digitalmars-d-learn]

On Sunday, 10 August 2014 at 21:57:29 UTC, Jonathan M Davis wrote:
> I'm not aware of opApply being broken, but I never use it,

  I remember very specifically it was brought up, that opApply was 
not working correctly and you could only use it with a very 
specific cases because... the implementation was incomplete?

  I think the discussion was partially on removing opApply from 
BitArray and going for a range or array approach instead because 
the problem would go away, but a lot of this is fuzzy and from 
memory. I have so much to catch up on :(