I think the 'real' problem, is that some core D people just
refuse to allow D to provide such an option to the programmer.
For what reason, I cannot fathom, since Swift can do this just
fine. I think it's some kind of bias against a particular style
of programming that some don't want to see occuring when people
use the D programming lanuguage. i.e. It has nothing at all to
do with implementation, since it's already been demonstrated
that it can be implemented, very easily.
Again, in this particular area, Swift is way ahead of D.
Sorry, but I do not believe Swift is near to the level of what D
is, it's a language that's tied - like jail - to Apple's
ecosystem, and its only real use is for iOS apps. They're two
completely different languages in general.
