https://issues.dlang.org/show_bug.cgi?id=20801

          Issue ID: 20801
           Summary: No ringarray in the std
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: crazymonkyyy@gmail.com

Created attachment 1783
  --> https://issues.dlang.org/attachment.cgi?id=1783&action=edit
monkyyy's ring array

I consider ring arrays to be fairly basic and should be in std.containers.

I know y'all hate it but here is my version.

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