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          TR1 describes 2 utility functions for creating TR1
          Tuple. make_tuple
          builds a tuple out of it's argument list, and tie
          builds a tuple of references to it's arguments. The details of these creation
          functions are described in this section.
        
template<typename T1, typename T2, ..., typename TN> tuple<V1, V2, ..., VN> make_tuple(const T1& t1, const T2& t2, ..., const TN& tn);
          Where Vi is X&
          if the cv-unqualified type Ti
          is reference_wrapper<X>,
          otherwise Vi is Ti.
        
          Returns: tuple<V1, V2, ..., VN>(t1, t2, ..., tN)
        
template<typename T1, typename T2, ..., typename TN> tuple<T1&, T2&, ..., TN&> tie(T1& t1, T2& t2, ..., TN& tn);
          Returns: tuple<T1&, T2&, ...,
          TN&>(t1, t2, ..., tN). When argument ti
          is ignore, assigning any
          value to the corresponding tuple element has no effect.