Clarifying "nearly empty class"

[Mark Mitchell]

The definition of "nearly empty class" is not as clear as it could be.

How about:

  "A class that:

   o Has no non-static data members (except, possibly, zero-width bitfields)
   o Has no base classes that are not either empty or nearly-empty.
   o Has at most one nearly-empty base class.
   o Has at least one virtual function (possibly inherited from a base class).
   
   Such a class contains only a Vptr."

Does that conform the committee's intent?

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Mark Mitchell                   mark at codesourcery.com
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