Peter Alexander:
and you've also increased the amount of data you need to pass into the function by 33%, violating the "Don't pay for what you don't use" philosophy.
The "Don't pay for what you don't use" is a C++ rule, it's not a D Zen rule. In D you sometimes pay a little if it gives back enough safety or convenience elsewhere. In D there are usually ways to not pay, but you have to ask for it explicitly.
Ranges are brilliant, and maybe you could even call them a superset of iterators, but just like we have vectors despite having matrices, and points despite having lines, we still want iterators even though we have ranges. They are simply different things.
There is also a price to pay if you want both abstractions in Phobos. A single abstraction makes things simpler, more compatible with each other, etc. Example: D has opApply, but at the moment nearly nothing in Phobos supports opApply (array() and foreachType, I'd like a third Phobos thing to support it).
Bye, bearophile
