130     struct Expr  struct
136       typedef typename Operation::value_type        value_type;      
138       typedef typename Operation::size_type 	    size_type;	    
144       explicit TFEL_MATH_INLINE Expr(Args&&... args)  in Expr()  function
154       operator[](const size_type i) const  in operator []()
168       operator[](const size_type i)  in operator []()
189     struct Expr<ResultType,UnaryOperation<T1,Op> >  struct
200       using value_type = typename ResultType::value_type;
202       using size_type  = typename ResultType::size_type;
204       using result_type = ResultType;
206       using argument_type = T1;
208       using argument_storage_type = ArgumentStorage<T1>;
213       TFEL_MATH_INLINE Expr(T1 l)  in Expr()  function
221       operator()(const Indexes... i) const  in operator ()()
231       argument_storage_type a; //<! argument of the operation
243     struct Expr<ResultType,BinaryOperation<T1,T2,Op> >  struct
254       using value_type = typename ResultType::value_type;
256       using size_type  = typename ResultType::size_type;
258       using result_type = ResultType;
260       using lhs_type = T1;
262       using rhs_type = T2;
264       using lhs_storage_type = ArgumentStorage<T1>;
266       using rhs_storage_type = ArgumentStorage<T2>;
271       TFEL_MATH_INLINE Expr(T1 l,T2 r)  in Expr()  argument
278       operator[](const size_type i) const  in operator []()
296       operator()(const Indexes... i) const  in operator ()()
304       lhs_storage_type a; //<! left  hand side argument of the operation
305       rhs_storage_type b; //<! right hand side argument of the operation
318     struct Expr<ResultType,ScalarObjectOperation<T1,T2,Op>>  struct
329       using value_type = typename ResultType::value_type;
331       using size_type  = typename ResultType::size_type;
333       using result_type = ResultType;
335       using lhs_type = T1;
337       using rhs_type = T2;
339       using lhs_storage_type = ArgumentStorage<T1>;
341       using rhs_storage_type = ArgumentStorage<T2>;
346       TFEL_MATH_INLINE Expr(T1 l,T2 r)  in Expr()  function
353       operator[](const size_type i) const  in operator []()
369       operator()(const Indexes... i) const  in operator ()()
377       const lhs_storage_type a; //<! left  hand side argument of the operation
378       const rhs_storage_type b; //<! right hand side argument of the operation
391     struct Expr<ResultType,ObjectScalarOperation<T1,T2,Op> >  struct
402       using value_type = typename ResultType::value_type;
404       using size_type  = typename ResultType::size_type;
406       using result_type = ResultType;
408       using lhs_type = T1;
410       using rhs_type = T2;
412       using lhs_storage_type = ArgumentStorage<T1>;
414       using rhs_storage_type = ArgumentStorage<T2>;
419       TFEL_MATH_INLINE Expr(T1 l,T2 r)  in Expr()  function
426       operator[](const size_type i) const  in operator []()
442       operator()(const Indexes... i) const  in operator ()()
450       lhs_storage_type a; //<! left  hand side argument of the operation
451       rhs_storage_type b; //<! right hand side argument of the operation
461     struct Expr<ResultType,DiadicProductOperation<T1,T2>>  struct
472       using value_type = typename ResultType::value_type;
474       using size_type  = typename ResultType::size_type;
476       using result_type = ResultType;
478       using lhs_type = T1;
480       using rhs_type = T2;
482       using lhs_storage_type = ArgumentStorage<T1>;
484       using rhs_storage_type = ArgumentStorage<T2>;
489       TFEL_MATH_INLINE Expr(T1 l,T2 r)  in Expr()  argument
500       operator()(const size_type i,  in operator ()()
507       lhs_storage_type a; //<! left  hand side argument of the operation
508       rhs_storage_type b; //<! right hand side argument of the operation