https://issues.dlang.org/show_bug.cgi?id=23304

          Issue ID: 23304
           Summary: Add core.bitops.ReverseBitRange
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: druntime
          Assignee: nobody@puremagic.com
          Reporter: keivan.shah@silverleafcaps.com

This complements the BitRange in core.bitops.

Useful when you want to traverse the bitset in reverse without having to reverse the underlying bitset.

--