namespace std  {                     template<typename _CharT>     struct char_traits;                                 template<typename _CharT, typename  = char_traits<_CharT> >     class basic_ostream;                     typedef basic_ostream<char> ostream;                                                                         template<typename , typename _Traits>     class basic_ostream      {                 public:                                                   basic_ostream&       operator<<(const void* )       ;                 };                                                                   template<typename _Tp> class complex;                     template<>     struct complex<double>     {                   typedef __complex__ double _ComplexT;                   complex( int  = 0)       {              __real__ _M_value = 0;             }                        _ComplexT _M_value;                 };                   }
                                                             typedef int __m128d __attribute__ ((__vector_size__ (16)));
                       enum {                   InnerUnrolling,   CompleteUnrolling };
 enum  {                  ReadOnlyAccessors,   WriteAccessors,    DirectWriteAccessors };
 enum {                   InnerProduct };
 struct has_direct_access {              enum {         ret = 1 };            };
 struct accessors_level {              enum {         has_direct_access ,          has_write_access ,          value    };            };
 template<typename Derived> struct EigenBase;
 template<typename Derived> class DenseBase;
 template<typename ,          int  = accessors_level::value > class DenseCoeffsBase;
 template<typename , int , int ,          int  =                              0 ?                            :  0,          int  = 0,          int  = 0 > class Matrix;
 template<typename Derived> class MatrixBase;
 template<typename , int BlockRows=0, int BlockCols=0, bool  = 0,          bool  = has_direct_access::ret> class Block;
 template<typename , typename , typename Rhs> class CwiseBinaryOp;
 template<typename , typename , int Mode> class GeneralProduct;
 template<typename ,          int  = accessors_level::has_write_access ?  : 0 > class MapBase;
 template< typename Rhs> struct product_type;
 template< typename Rhs,          int  = product_type<Rhs>::value> struct ProductReturnType;
 template<typename Derived> class MatrixFunctionReturnValue;
 template<typename T> struct result_of ;
 template<typename Func, typename ArgType> struct result_of<Func(ArgType)> {                typedef ArgType type;            };
 template<typename Func, typename ArgType0, typename ArgType1> struct result_of<Func(ArgType0,ArgType1)> {                typedef ArgType0 type;            };
 template<typename T> struct packet_traits;
 template<typename T> struct unpacket_traits ;
 template< int _Cols> struct size_at_compile_time {              enum {         ret =  _Cols==0 ? 0 : 1 };            };
 template<typename Derived> struct dense_xpr_base {              typedef MatrixBase<Derived> type;            };
 struct GenericNumTraits {                  enum {                IsComplex      };                };
 template<typename T> struct NumTraits : GenericNumTraits {               };
 template<typename _Real> struct NumTraits<std::complex<_Real> >    {                  enum {              IsComplex = 1   };                };
 template<typename Packet>  Packet pload(const typename unpacket_traits<Packet>::type* ) ;
 template<> struct packet_traits<double>  {              typedef __m128d type;            };
 template<> struct packet_traits<int>  {              typedef   int type;            };
 struct Packet1cd {                Packet1cd( __m128d& p1) : v(p1) {        }              __m128d v;            };
 template<> struct packet_traits<std::complex<double> >  {              typedef Packet1cd type;            };
 template<> struct unpacket_traits<Packet1cd> {            typedef std::complex<double> type;            };
 template<typename Derived> class DenseCoeffsBase<Derived,ReadOnlyAccessors> : public EigenBase<Derived> {                };
 template<typename Derived> class DenseCoeffsBase<Derived, DirectWriteAccessors>   : public DenseCoeffsBase<Derived, WriteAccessors> {                };
 template<typename Derived> class MatrixBase   : public DenseBase<Derived> {                  public:     typedef MatrixBase StorageBaseType;                                DenseBase<Derived>::derived;                    typedef Derived  PlainObject;                template<typename NewType> Derived cast()  {          }                template<typename OtherDerived>   CwiseBinaryOp< int,  Derived,  OtherDerived > cwiseProduct( MatrixBase<OtherDerived> )  ;                    template <typename OtherDerived>     void  operator=(const DenseBase<OtherDerived>& );                    template<typename OtherDerived>     const typename ProductReturnType<OtherDerived>::Type     operator*(const MatrixBase<OtherDerived> &p1) const;                               const MatrixFunctionReturnValue<Derived> matrixFunction() const;                };
 template <typename Derived> struct assign_traits {               enum {              MayUnrollCompletely = Derived::SizeAtCompileTime                             };               enum {             Unrolling = 0  || 0                 ?                      0 ?                    : 0 ?                                               : 0                                  : 1                 ?  MayUnrollCompletely  ?  : 0                : 0                 ?                : 0   };            };
 template<typename Derived1> struct assign_innervec_CompleteUnrolling {              enum {               JointAlignment    };              static  void run(Derived1 &p1, const Matrix<std::complex<double>, 1, 1, 0, 0, 0> &p2)   {             p1.template copyPacketByOuterInner<Matrix<std::complex<double>, 1, 1, 0, 0, 0>,0, JointAlignment>(0,0, p2);           }            };
 template<typename Derived1, typename ,                    int  = assign_traits<Derived1>::Unrolling> struct assign_impl;
 template<typename Derived1, typename Derived2> struct assign_impl<Derived1, Derived2,  CompleteUnrolling> {              static  void run(Derived1 &p1, const Derived2 &p2)   {             assign_innervec_CompleteUnrolling<Derived1>       ::run(p1, p2);           }            };
 template<typename Derived1, typename Derived2> struct assign_impl<Derived1, Derived2,0> {              static  void run(Derived1 ,  Derived2 )   ;            };
 template<typename Derived, typename OtherDerived,                    int  = Derived::IsVectorAtCompileTime                 && OtherDerived::IsVectorAtCompileTime                 &&    0                  &&  1> struct assign_selector;
 template<typename Derived, typename OtherDerived> struct assign_selector<Derived,OtherDerived,false> {              static  Derived& run(Derived& p1, const OtherDerived& p2) {          p1.lazyAssign(p2.derived());         }            };
 template <typename T,             int  = 0 ?                          : 1*sizeof(T)%16==0 ? 16                         : 0 > struct plain_array {            };
 template<typename T> class DenseStorage {                    plain_array<T> m_data;                  public:                      const T *data() const {          return m_data.array;          }                     T *data() {          return m_data.array;          }                };
 template<typename Derived> class ReturnByValue   : public dense_xpr_base< ReturnByValue<Derived> >::type {                  public:     typedef Derived  ReturnType;                    template<typename Dest>      void evalTo(Dest& p1) const     {          static_cast<const Derived*>(0)->evalTo(p1);          }                };
 template<typename , typename , typename , typename StorageKind> class CwiseBinaryOpImpl;
 template<typename BinaryOp, typename Lhs, typename Rhs> class CwiseBinaryOpImpl<BinaryOp, Lhs, Rhs, int>   : public dense_xpr_base<CwiseBinaryOp<BinaryOp, Lhs, Rhs> >::type {                };
 template<typename Derived> class MapBase<Derived, ReadOnlyAccessors>   : public dense_xpr_base<Derived>::type {                  public:     typedef typename dense_xpr_base<Derived>::type Base;                };
 template<typename Derived> class MapBase<Derived, WriteAccessors>   : public MapBase<Derived, ReadOnlyAccessors> {                  public:                 MapBase::Base::operator=;                };
 template<typename XprType, int BlockRows, int BlockCols, bool InnerPanel> class Block<XprType,BlockRows,BlockCols, InnerPanel,true>   : public MapBase<Block<XprType,0,0,0, true> > {                  public:     typedef MapBase<Block> Base;                     Base::operator =;                };
 template< typename Rhs> struct product_type {               enum {             value    };            };
 template< typename Rhs, int ProductType> struct ProductReturnType {                  typedef GeneralProduct<Matrix<std::complex<double>, 0, 0, 0, 0, 0> , Matrix<std::complex<double>, 0, 0, 0, 0, 0> , ProductType> Type;                };
 template<typename Lhs, typename Rhs> class GeneralProduct<Lhs, Rhs, InnerProduct>   :      public Matrix<typename Rhs::Scalar,1,1> {                             public:     GeneralProduct(const Lhs& p1, const Rhs& p2)     {                Matrix<typename Rhs::Scalar, 1, 1>::coeffRef(0,0) = p1.transpose().cwiseProduct(p2).sum();              }                };
 class MatrixFunctionAtomic {                  public:                              MatrixFunctionAtomic(int )  {          }                };
 void __assert_fail (         )       ;
                                                                                    template<typename T> struct traits : traits<T> {           };
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               template<typename Packet, int LoadMode>  Packet ploadt(const typename unpacket_traits<Packet>::type* p1) {                     return pload<Packet>(p1);            }
                                                                                                                             template<>  Packet1cd pload (const std::complex<double>* p1) {            return *(__m128d *)p1;            }
                                                                                 template<typename Derived> class DenseCoeffsBase<Derived, WriteAccessors> : public DenseCoeffsBase<Derived, ReadOnlyAccessors> {                  public:                      typedef typename traits<Derived>::Index Index;                                DenseCoeffsBase<Derived, ReadOnlyAccessors>::derived;                    template<typename OtherDerived, int StoreMode, int LoadMode>      void copyPacket(Index , Index , const DenseBase<OtherDerived>& p3)     {                derived().template writePacket<StoreMode>(0,0,         p3.derived().template packet<LoadMode>(0,0));              }          template<typename OtherDerived, int , int LoadMode>      void copyPacketByOuterInner(Index , Index , const DenseBase<OtherDerived>& p3)     {                                    derived().template copyPacket< OtherDerived,0, LoadMode>(0,0, p3);              }                };
                                            template<typename Derived> class DenseBase   : public DenseCoeffsBase<Derived> {                  public:                    typedef typename traits<Derived>::Index Index;                                  typedef DenseCoeffsBase<Derived> Base;                     Base::derived;                     Base::size;                    enum {                  SizeAtCompileTime = size_at_compile_time<                                                    traits<Derived>::ColsAtCompileTime>::ret,         MaxSizeAtCompileTime ,       IsVectorAtCompileTime          };                    template<typename OtherDerived>     Derived& lazyAssign(const DenseBase<OtherDerived>& );                               Derived transpose() const;                    typedef Derived  ConstSegmentReturnType;                     DenseBase::ConstSegmentReturnType head(Index ) ;                                Derived eval() const     {              }                    typename traits<Derived>::Scalar sum() const;                    template<typename BinaryOp>     typename result_of<BinaryOp(typename traits<Derived>::Scalar)>::type     redux(const BinaryOp& ) const;                               Derived col(Index ) const ;                 Derived row(Index )  ;                };
                                            template<typename Derived> struct EigenBase {                  typedef typename traits<Derived>::Index Index;                  Derived& derived() ;                  const Derived& derived() const {          return *static_cast<const Derived*>(this);          }                   Index rows() const {          }                   Index size() const ;                };
                                                                                                                                        template<typename Derived> template<typename OtherDerived> inline Derived& DenseBase<Derived>   ::lazyAssign(const DenseBase<OtherDerived>& p1) {                  assign_impl<Derived, OtherDerived>::run(derived(),p1.derived());                }
                                                                                                template<typename PtrType>    inline PtrType eigen_unaligned_array_assert_workaround_gcc47(PtrType p1) {            return p1;            }
                  template <typename T> struct plain_array<T,   16> {               T array[1];              plain_array() {         (reinterpret_cast<unsigned int>(eigen_unaligned_array_assert_workaround_gcc47(array)) & 1) == 0 &&   "" ? static_cast<void> (0) : __assert_fail (   );        }            };
                                                                template<typename Derived> struct traits<ReturnByValue<Derived> >   :  traits<typename traits<Derived>::ReturnType> {            };
                                                      template<typename Derived> class PlainObjectBase : public dense_xpr_base<Derived>::type {                  public:                         typedef typename traits<Derived>::Index Index;                    typedef typename traits<Derived>::Scalar Scalar;                    typedef typename packet_traits<Scalar>::type PacketScalar;                       DenseStorage<Scalar> m_storage;                     Scalar& coeffRef(Index , Index )     {                         return m_storage.data()[ 0];              }                    template<int LoadMode>      PacketScalar packet(Index , Index ) const     {                return ploadt<PacketScalar, LoadMode>                (m_storage.data() );              }                    template<int StoreMode>      void writePacket(Index , Index , const PacketScalar& )     ;                    template<typename OtherDerived>     void  _set_noalias(const DenseBase<OtherDerived>& p1)     {                 assign_selector<Derived,OtherDerived>::run(this->derived(), p1.derived());              }                };
                                template<typename _Scalar, int _Rows, int _Cols, int _Options, int _MaxRows, int _MaxCols> struct traits<Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols> > {              typedef _Scalar Scalar;              typedef int StorageKind;              typedef int Index;              enum {                  ColsAtCompileTime = _Cols ,     MaxColsAtCompileTime       };            };
                                template<typename _Scalar, int _Rows, int _Cols, int , int , int _MaxCols> class Matrix   : public PlainObjectBase<Matrix<_Scalar, _Rows, _Cols,0,0, _MaxCols> > {                  public:     typedef PlainObjectBase<Matrix> Base;                      Matrix()      {              }                    template<typename OtherDerived>      Matrix(const MatrixBase<OtherDerived>& )                   {              }                     Matrix(const Matrix& p1)                  {                Base::_set_noalias(p1);              }                    template<typename OtherDerived>      Matrix(const ReturnByValue<OtherDerived>& p1)     {                p1.evalTo(*this);              }                };
                                          template<typename BinaryOp, typename Lhs, typename Rhs> struct traits<CwiseBinaryOp<BinaryOp, Lhs, Rhs> > {              enum {                  ColsAtCompileTime  ,     MaxColsAtCompileTime    };              typedef typename result_of<                      BinaryOp(                        typename Lhs::Scalar,                        typename Rhs::Scalar                      )                    >::type Scalar;              typedef typename traits<Lhs>::Index Index;            };
                                                      template<typename , typename Lhs, typename Rhs> class CwiseBinaryOp :    public CwiseBinaryOpImpl<           int, Matrix<std::complex<double>, 0, 0, 0, 0, 0>, Rhs,           typename traits<Rhs>::StorageKind> {                };
                                                                                                  template<typename XprType, int BlockRows, int BlockCols, bool InnerPanel, bool HasDirectAccess> struct traits<Block<XprType, BlockRows, BlockCols, InnerPanel, HasDirectAccess> > : traits<XprType> {            };
                                                                template<typename Derived> inline typename traits<Derived>::Scalar DenseBase<Derived>::sum() const {                  if(  size())     return 0;                  return this->redux(0);                }
                                                   void  print_matrix( const Matrix<double,0,  1>& ) {            }
                                template<typename Derived> std::ostream & operator << (std::ostream ,  const DenseBase<Derived> & p2) {                   print_matrix( p2.eval());                }
                                                                                                            template<typename Derived> template<typename OtherDerived> inline const typename ProductReturnType< OtherDerived>::Type MatrixBase<Derived>::operator*(const MatrixBase<OtherDerived> &p1) const {                  return typename ProductReturnType<OtherDerived>::Type(derived(), p1.derived());                }
                                             template <typename MatrixType,    typename AtomicType,           int  = NumTraits<typename traits<MatrixType>::Scalar>::IsComplex> class MatrixFunction {                       typedef traits<MatrixType> Traits;                    static const int MaxCols = Traits::MaxColsAtCompileTime;                    typedef std::complex<typename Traits::Scalar> ComplexScalar;                    typedef Matrix<ComplexScalar,0,0,0,0, MaxCols> ComplexMatrix;                  public:     MatrixFunction( MatrixType& , AtomicType& p2) :  m_atomic(p2) {          }                    ComplexMatrix compute_CA = m_A.template cast<ComplexScalar>();          ComplexMatrix compute_Cresult;          template <typename ResultType>     void compute(ResultType& )     {                                    MatrixFunction<ComplexMatrix, AtomicType> mf(compute_CA, m_atomic);                mf.compute(compute_Cresult);              }                       MatrixType m_A;                    AtomicType& m_atomic;                };
                      template <typename MatrixType, typename AtomicType> class MatrixFunction<MatrixType, AtomicType, 1> {                                        typedef typename MatrixType::Scalar Scalar;                    typedef typename MatrixType::Index Index;                    static const int ColsAtCompileTime = traits<MatrixType>::ColsAtCompileTime;                               typedef Matrix<Scalar, 0, ColsAtCompileTime> DynMatrixType;                  public:     MatrixFunction(const MatrixType& , AtomicType& );                    template <typename ResultType> void compute(ResultType& );                    Block<MatrixType> block(  );                    DynMatrixType solveTriangularSylvester(const DynMatrixType& , const DynMatrixType& );                    AtomicType& m_atomic;                    Matrix<Index,0, 1> m_clusterSize;                };
                      template <typename MatrixType, typename AtomicType> MatrixFunction<MatrixType,AtomicType,1>::MatrixFunction(const MatrixType& , AtomicType& p2)   :  m_atomic(p2) {                }
                      template <typename MatrixType, typename AtomicType> template <typename ResultType> void MatrixFunction<MatrixType,AtomicType,1>::compute(ResultType& ) {                  for (Index diagIndex ;                 m_clusterSize.rows();                diagIndex++)          {                DynMatrixType A = block(  ),  B = block(  );                                                         block(  ) = solveTriangularSylvester(A, B);              }                      }
                      template <typename MatrixType, typename AtomicType> typename MatrixFunction<MatrixType,AtomicType,1>::DynMatrixType MatrixFunction<MatrixType,AtomicType,1>::solveTriangularSylvester(   const DynMatrixType& p1,   const DynMatrixType& p2) {                                             DynMatrixType X;                  for (Index  m ;                m ;                )                                                                      Matrix<Scalar,1,1> XBmatrix = X.row(0).head(0) * p2.col(0).head(0);                                  }
                      template<typename Derived> class MatrixFunctionReturnValue : public ReturnByValue<MatrixFunctionReturnValue<Derived> > {                  public:                    Derived StemFunction;                               template <typename ResultType>      void evalTo(ResultType& p1) const     {                typedef typename Derived::PlainObject PlainObject;                            MatrixFunctionAtomic atomic(0);                 PlainObject Aevaluated = m_A.eval();                MatrixFunction<PlainObject, MatrixFunctionAtomic> mf(Aevaluated, atomic);                mf.compute(p1);          }                       Derived m_A;                };
                                template<typename Derived> struct traits<MatrixFunctionReturnValue<Derived> > {              typedef typename Derived::PlainObject ReturnType;            };
                                template <typename Derived> const MatrixFunctionReturnValue<Derived> MatrixBase<Derived>::matrixFunction() const {                }
                                   namespace std  {                      ostream cout;                   }
                                                        main() {                     Matrix<double,0, 0> A;                     std::cout << ""             << A.matrixFunction() << "";                   }