https://issues.dlang.org/show_bug.cgi?id=23553

          Issue ID: 23553
           Summary: opCmp spec is incomplete
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dlang.org
          Assignee: nobody@puremagic.com
          Reporter: grimmaple95@gmail.com

The spec page for `opCmp` (https://dlang.org/spec/operatoroverloading.html#compare) doesn't tell what values should be returned from it

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