Idiomatic way to write a range that tracks how much it consumes

drug drug2004 at
Mon Apr 27 04:41:58 UTC 2020

27.04.2020 06:38, Jon Degenhardt пишет:
> Is there a better way to write this?
> --Jon

I don't know a better way, I think you enlist all possible ways - get a 
value using either `front` or special range member. I prefer the second 
variant, I don't think it is less consistent with range paradigms. 
Considering you need amount of consumed bytes only when range is empty 
the second way is more effective.

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