From: musiphil@bawi.org   
      
   On 2012-03-02 12:29, Andrea Venturoli wrote:   
   > On 02/29/12 12:58, Kris Prad wrote:   
   >   
   >> Eventually ~auto_ptr() must see the underlying class definition for   
   >> the code to work correctly.   
   >   
   > AFAIK, this is true only if the underlying class has a non trivial   
   > destructor or overrides delete.   
      
   So in this case, I guess, the compiler just skips the calls to the   
   destructor and calls the global deallocation function, assuming that   
   the class has a trivial destructor and doesn't have a class-specific   
   deallocation function... and gives you a warning.   
      
   It would have been better if the warning had stated the assumption, as:   
      
   "warning: delete of pointer to incomplete class, correct only if   
   the class has a trivial destructor and doesn't have a class-specific   
   deallocation function"   
      
   ... eh, but this is too long. :)   
      
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   Seungbeom Kim   
      
      
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