From: hansewetz@hotmail.com   
      
   Many thanks, I realized right after the post what was wrong ... but didn't   
   think of contraining the function to tuplets with enable_if<> (as you showed)   
   which has now been added:   
      
   template   
   typename std::enable_if::type>::type>::value>::type   
   applyWithIndex(Func f,Tuple&&t){   
     typedef typename std::remove_cv::type>::type TupleNonRef;   
     static const int N=std::tuple_size::value;   
     ApplyWithIndex::apply(f,std::forward(t));   
   }   
      
   Hans   
      
      
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