Patch clj-428-change-Sorted-seqFrom-to-take-inclusive-patch-v1.txt dated Apr 28 2013 was written by Mark Engelberg in July 2010, and was attached to a message he sent to the dev thread linked in the description. The approach he takes is described by him in that thread, copied here:
----------------------------------------
Meanwhile, to initiate discussion on how to modify subseq, I've attached a proposed patch. This patch works by modifying the seqFrom method of the Sorted interface to take an additional "inclusive" parameter (i.e., <= and >= are inclusive, < and > are not).
In this patch, I do not address one issue I raised before, which is whether subseq implies by its name that it should return a seq rather than a sequence (in other words nil rather than ()). If seq behavior is desired, it would be necessary to wrap a call to seq around the calls to take-while. But for now, I'm just making the behavior match the current behavior.
Although I think this is the cleanest way to address the extensibility issue with subseq, the change to seqFrom will break anyone who currently is overriding that method. I didn't see any such classes in clojure.contrib, so I don't think it's an issue, but if this is a concern, my other idea is to fix the problem entirely within subseq by changing the calls to next into calls to drop-while. I have coded this to confirm that it works, and can provide that alternative patch if desired.
----------------------------------------
I can also supply a patch that uses drop-while in clojure.core/subseq and rsubseq if such an approach is preferred to the one in this patch.
Enhancement
Open
Minor
Converted from http://www.assembla.com/spaces/clojure/tickets/428