Adapting foreign iterators to D ranges

[Alexandru Ermicioi]

On Monday, 22 April 2024 at 11:36:43 UTC, Chloé wrote:
> The first implementation has the advantage is being simpler and 
> empty being const, but has the downside that next is called 
> even if the range ends up not being used. Is either approach 
> used consistently across the D ecosystem?

You can also place initialization logic inside front, then empty 
could become const.

I don't think there is a preffered way of initializing such 
ranges, so imho consider what's best for your use case.