Vtables

[Mark Mitchell]

>>>>> "Jim" == Jim Dehnert <dehnert at baalbek.engr.sgi.com> writes:

    Jim> Yes.  What the language means is the order in which
    Jim> allocation occurs in the algorithm, not in memory, which is
    Jim> what the document defines as inheritance graph order.  I'll
    Jim> try to clarify this.

Thanks!

BTW, "inheritance graph order" is also defined a little bit
inaccurately:

  When all base classes of a class, direct and indirect, are viewed as
  an ordered set, the order assumed that obtained by a depth-first,
  left-to-right walk of the inheritance graph.

Really, this should say something like "all subobjects of a class
(including the complete object) ..."  That's not really very good --
but the point is that there can of course be multiple instances of a
given class in the hierarchy.  

It's really hard to make all these words clear, but it's worth it to
do our best -- that's the best way to ensure the ABI can be
implemented by lots of different people.

--
Mark Mitchell                   mark at codesourcery.com
CodeSourcery, LLC               http://www.codesourcery.com