[Issue 15863] New: .length for AA.byKey

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15863

          Issue ID: 15863
           Summary: .length for AA.byKey
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: druntime
          Assignee: nobody at puremagic.com
          Reporter: yshuiv7 at gmail.com

This will enable us to pass .byKey to functions which require hasLength!Range.

--