464b92e4   
   From: bouncer@dev.null   
      
   Kris Prad wrote:   
      
   > This code snippet results in compiler warning:   
   >   
   > ----   
   > #include    
   > class A; // fwd class decl.   
   >   
   > void test()   
   > {   
   >      A* a;   
   >      std::auto_ptr ap(a); // A is not defined here   
   > }   
   > ----   
   >   
   >   
   > On Comeau online compiler:   
   > "memory", line 76: warning: delete of pointer to incomplete class   
   >      ~auto_ptr() { delete _M_ptr; }   
   >   
   >   
   > My question:   
   > Eventually ~auto_ptr() must see the underlying class definition for   
   > the code to work correctly. So, why is this only a warning, and not a   
   > full fledged error?   
      
   Because at some point, someone decided that it was a good idea to allow   
   for this kind of nonsense, probably to keep the C folks happy.   
   Be thankful to the EDG guys for spotting this... and remember there is   
   only one warning level: warnings are errors.   
      
   Regards,   
      
   - Wil   
      
      
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