Proposal for SentinelInputRange

[Zach the Mystic]

On Thursday, 28 February 2013 at 05:28:20 UTC, Jonathan M Davis 
wrote:
> What are we gaining here that can't be gained by simply using a 
> few static ifs to special case strings?

That's the question that is swaying me to your side at the 
moment. It's possible that the special performance which Sentinel 
Ranges offer is actually confined to a very narrow band of 
problems which can be dealt with transparently in the existing 
library. In which case the right thing to do is make an 
enhancement request asking for just such performance enhancing 
drugs to be administered. :-)