From: lichray@googlemail.com   
      
   On Wednesday, November 21, 2012 5:43:19 PM UTC-6, Cassio Neri wrote:   
   > foo seen above). However, T is unknown in advance. The question is:   
   > can I be sure that foo has the same layout as T[N]?   
      
   No, very sad (10 p.5, p.6, p.8), the base class subobjects can   
   have different physical order from their order appears in the base   
   specifier list.   
      
   However, since member subobject, base class subobject, array element   
   are all considered as subojects (1.8 p.2), they have the same   
   alignment requirements.  More important, they are initialized in   
   their order appears in the base specifier list, and destructed in   
   the reverse order.  So, your intention can be meet, if you don't care   
   about the physical ordering.   
      
   std::tuple uses the technique you showed, but std::array does not.   
      
      
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