diff --git a/src/include/operation/cxz_operation.cc.h b/src/include/operation/cxz_operation.cc.h
index 97b5909..731d97c 100644
--- a/src/include/operation/cxz_operation.cc.h
+++ b/src/include/operation/cxz_operation.cc.h
@@ -46,390 +46,124 @@ namespace CNORXZ
     }
 
 
-    /****************************
-     *   ConstOperationRoot     *
-     ****************************/
+    /***************
+     *   COpRoot   *
+     ***************/
 
-    template <typename T, class... Ranges>
-    ConstOperationRoot<T,Ranges...>::
-    ConstOperationRoot(const ArrayBase<T,Ranges...>& ma,
-		       const std::shared_ptr<typename Ranges::IndexType>&... indices) :
-	mDataPtr(ma.data()),
-        mOrigDataPtr(ma.data()),
-	mIndex( ma.begin() )
+    template <typename T, class IndexT>
+    constexpr COpRoot<T,IndexT>::COpRoot(const DArrayBase<T>& a, const Sptr<IndexT>& ind) :
+	mData(a.data()),
+	mIndex(ind)
+    {}
+
+    template <typename T, class IndexT>
+    constexpr COpRoot<T,IndexT>::COpRoot(const T* data, const Sptr<IndexT>& ind) :
+	mData(data),
+	mIndex(ind)
+    {}
+
+    template <typename T, class IndexT>
+    template <class PosT>
+    constexpr decltype(auto) COpRoot<T,IndexT>::get(const PosT& pos) const
     {
-	mIndex(indices...);
-        mDataPtr = mOrigDataPtr + mIndex.pos();
+	if constexpr(is_epos_type<PosT>::value){
+	    return vreg(mData,pos); // distinguish between consecutive/non-consecutive
+	}
+	else {
+	    return mData[pos.val()];
+	}
     }
 
-    template <typename T, class... Ranges>
-    ConstOperationRoot<T,Ranges...>::
-    ConstOperationRoot(std::shared_ptr<ArrayBase<T,Ranges...> > maptr,
-		       const std::shared_ptr<typename Ranges::IndexType>&... indices) :
-	mDataPtr(maptr->data()),
-        mOrigDataPtr(maptr->data()),
-	mIndex(maptr->begin()),
-	mMaPtr(maptr)
+    template <typename T, class IndexT>
+    template <SizeT I>
+    constexpr decltype(auto) COpRoot<T,IndexT>::rootSteps(const IndexId<I>& id) const
     {
-	mIndex(indices...);
-        mDataPtr = mOrigDataPtr + mIndex.pos();
+	return mIndex->stepSize(id);
     }
 
-    template <typename T, class... Ranges>
-    ConstOperationRoot<T,Ranges...>::
-    ConstOperationRoot(const T* data, const IndexType& ind) :
-	mDataPtr(data),
-        mOrigDataPtr(data),
-	mIndex( ind )
-    {
-        mDataPtr = mOrigDataPtr + mIndex.pos();
-    }
-
-    template <typename T, class... Ranges>
-    template <class ET>
-    inline const T& ConstOperationRoot<T,Ranges...>::get(ET pos) const
-    {
-	return mDataPtr[pos.val()];
-    }
-
-    template <typename T, class... Ranges>
-    template <typename V, class ET>
-    inline const V& ConstOperationRoot<T,Ranges...>::vget(ET pos) const
-    {
-	return *(reinterpret_cast<const V*>(mDataPtr+pos.val()));
-    }
-
-    template <typename T, class... Ranges>
-    template <class ET>
-    inline ConstOperationRoot<T,Ranges...>& ConstOperationRoot<T,Ranges...>::set(ET pos)
-    {
-        mDataPtr = mOrigDataPtr + pos.val();
-	return *this;
-    }
-
-    template <typename T, class... Ranges>
-    const T* ConstOperationRoot<T,Ranges...>::data() const
-    {
-        return mDataPtr;
-    }
-    
-    template <typename T, class... Ranges>
-    MExt<None> ConstOperationRoot<T,Ranges...>::rootSteps(std::intptr_t iPtrNum) const
-    {
-	return MExt<None>(RangeHelper::getStepSize( mIndex, iPtrNum ));
-    }
-
-
-    template <typename T, class... Ranges>
+    template <typename T, class IndexT>
     template <class Expr>
-    Expr ConstOperationRoot<T,Ranges...>::loop(Expr exp) const
+    constexpr decltype(auto) COpRoot<T,IndexT>::loop(Xpr&& xpr) const
     {
-	return exp;
+	return xpr;
     }
 
-    /********************
-     *   StaticCast     *
-     ********************/
-
-    template <typename T, class Op>
-    StaticCast<T,Op>::StaticCast(const Op& op) : mOp(op) {}
-
-    template <typename T, class Op>
-    template <class ET>
-    inline T StaticCast<T,Op>::get(ET pos) const
+    template <typename T, class IndexT>
+    const T* COpRoot<T,IndexT>::data() const
     {
-	return static_cast<T>( mOp.get(pos) );
-    }
-
-    template <typename T, class Op>
-    template <typename V, class ET>
-    inline V StaticCast<T,Op>::vget(ET pos) const
-    {
-	assert(0); // !!!
-	return V();
-    }
-
-    template <typename T, class Op>
-    template <class ET>
-    inline StaticCast<T,Op>& StaticCast<T,Op>::set(ET pos)
-    {
-	mOp.set(pos);
-	return *this;
+        return mData;
     }
     
-    template <typename T, class Op>
-    auto StaticCast<T,Op>::rootSteps(std::intptr_t iPtrNum) const
-	-> decltype(mOp.rootSteps(iPtrNum))
-    {
-	return mOp.rootSteps(iPtrNum);
-    }
 
-    template <typename T, class Op>
-    template <class Expr>
-    Expr StaticCast<T,Op>::loop(Expr exp) const
-    {
-	return mOp.loop(exp);
-    }
+    /****************
+     *   OpRoot     *
+     ****************/
     
+    template <typename T, class IndexT>
+    constexpr OpRoot<T,IndexT>::OpRoot(MDArrayBase<T>& a, const Sptr<IndexT>& ind);
+	mData(a.data()),
+	mIndex(ind)
+    {}
+
+    template <typename T, class IndexT>
+    constexpr OpRoot<T,IndexT>::OpRoot(T* data, const Sptr<IndexT>& ind) :
+	mData(data),
+	mIndex(ind)
+    {}
     
-    /****************************
-     *   MetaOperationRoot     *
-     ****************************/
-
-    template <class Range>
-    MetaOperationRoot<Range>::
-    MetaOperationRoot(const std::shared_ptr<IndexType>& ind) :
-	mWorkIndex(*ind), mIndex( ind ) {}
-
-    
-    template <class Range>
-    template <class ET>
-    inline typename MetaOperationRoot<Range>::value_type
-    MetaOperationRoot<Range>::get(ET pos) const
+    template <typename T, class IndexT>
+    template <class Op>
+    constexpr OpRoot<T,IndexT>& OpRoot<T,IndexT>::operator=(const Op& o)
     {
-	return (mWorkIndex = pos.val()).meta();
-    }
-
-    template <class Range>
-    template <typename V, class ET>
-    inline V
-    MetaOperationRoot<Range>::vget(ET pos) const
-    {
-	assert(0); // !!!
-	return V();
-    }
-
-    template <class Range>
-    template <class ET>
-    inline MetaOperationRoot<Range>& MetaOperationRoot<Range>::set(ET pos)
-    {
-	return *this;
-    }
-
-    template <class Range>
-    MExt<None> MetaOperationRoot<Range>::rootSteps(std::intptr_t iPtrNum) const
-    {
-	return MExt<None>(RangeHelper::getStepSize( *mIndex, iPtrNum ));
-    }
-
-
-    template <class Range>
-    template <class Expr>
-    Expr MetaOperationRoot<Range>::loop(Expr exp) const
-    {
-	return exp;
-    }
-
-    /***********************
-     *   OperationRoot     *
-     ***********************/
-    
-    template <typename T, class... Ranges>
-    OperationRoot<T,Ranges...>::
-    OperationRoot(MutableArrayBase<T,Ranges...>& ma,
-		  const std::shared_ptr<typename Ranges::IndexType>&... indices) :
-	mDataPtr(ma.data()),
-        mOrigDataPtr(ma.data()),
-        mDataAcc( ma.data(), ma.data() ),
-	mIndex( ma.begin() )
-    {
-	mIndex(indices...);
-        mDataAcc.set( mIndex.pos() );
-        mDataPtr = mOrigDataPtr + mIndex.pos();
-    }
-
-    template <typename T, class... Ranges>
-    OperationRoot<T,Ranges...>::
-    OperationRoot(MutableArrayBase<T,Ranges...>& ma,
-		  const std::tuple<std::shared_ptr<typename Ranges::IndexType>...>& indices) :
-	mDataPtr(ma.data()),
-        mOrigDataPtr(ma.data()),
-        mDataAcc( ma.data(), ma.data() ),
-	mIndex( ma.begin() )
-    {
-	mIndex(indices);
-        mDataAcc.set( mIndex.pos() );
-        mDataPtr = mOrigDataPtr + mIndex.pos();
-    }
-
-    template <typename T, class... Ranges>
-    OperationRoot<T,Ranges...>::
-    OperationRoot(T* data, const IndexType& ind) :
-	mDataPtr(data),
-        mOrigDataPtr(data),
-        mDataAcc( data, data ),
-	mIndex( ind )
-    {
-        mDataAcc.set( mIndex.pos() );
-        mDataPtr = mOrigDataPtr + mIndex.pos();
-    }
-
-    template <typename T, class... Ranges>
-    template <class Func, class Access, class OpClass>
-    auto OperationRoot<T,Ranges...>::asx(const OpClass& in) const
-    {
-	static_assert(Access::VSIZE > 0, "Access::VSIZE failed");
-	return mIndex.ifor(1,this->template asxExpr<Func,Access>(in)).template vec<Access::VSIZE>();
-    }
-
-    template <typename T, class... Ranges>
-    template <class Func, class Access, class OpClass>
-    auto OperationRoot<T,Ranges...>::asxExpr(const OpClass& in) const
-    {
-        static_assert( OpClass::SIZE == decltype(in.rootSteps())::SIZE, "Ext Size mismatch" );
-        return in.loop(AssignmentExpr<T,Func,Access,OperationRoot<T,Ranges...>,OpClass>
-                       (Access(mDataAcc),*this,in));
-    }
-    
-    template <typename T, class... Ranges>
-    template <class Func, class Access, class OpClass, class Index>
-    auto OperationRoot<T,Ranges...>::asx(const OpClass& in, const std::shared_ptr<Index>& i) const
-    {
-	static_assert(Access::VSIZE > 0, "Access::VSIZE failed");
-        return i->ifor(1,this->template asxExpr<Func,Access>(in)).template vec<Access::VSIZE>();
-    }
-
-    template <typename T, class... Ranges>
-    template <class OpClass>
-    auto OperationRoot<T,Ranges...>::assign(const OpClass& in) const
-    {
-        return this->template asx<identity<T>,PointerAccess<T>>(in);
-    }
-
-    template <typename T, class... Ranges>
-    template <class OpClass>
-    auto OperationRoot<T,Ranges...>::assignExpr(const OpClass& in) const
-    {
-        return this->template asxExpr<identity<T>,PointerAccess<T>>(in);
-    }
-    
-    template <typename T, class... Ranges>
-    template <class OpClass, class Index>
-    auto OperationRoot<T,Ranges...>::assign(const OpClass& in, const std::shared_ptr<Index>& i) const
-    {
-        return this->template asx<identity<T>,PointerAccess<T>>(in,i);
-    }
-
-    template <typename T>
-    using xplus = plus<T>;
-
-    template <typename T, class... Ranges>
-    template <class OpClass>
-    auto OperationRoot<T,Ranges...>::plus(const OpClass& in) const
-    {
-        return this->template asx<xplus<T>,PointerAccess<T>>(in);
-    }
-
-    template <typename T, class... Ranges>
-    template <class OpClass, class Index>
-    auto OperationRoot<T,Ranges...>::plus(const OpClass& in, const std::shared_ptr<Index>& i) const
-    {
-        return this->template asx<xplus<T>,PointerAccess<T>>(in,i);
-    }
-    
-    template <bool VABLE, class Func, typename TarOp, class OpClass>
-    inline void vexec(TarOp& th, const OpClass& in)
-    {
-	// VECTORIZATION!!!
-	// PARALLEL!!!
-        if constexpr(VABLE){
-            CHECK;
-            typedef typename TarOp::value_type T;
-            auto x = th.template asx<VFunc<Func>,VPointerAccess<T>>(in);
-            if(x.rootSteps(x.vI()) == 1){
-		//if(0){
-                CHECK;
-                x();
-            }
-            else {
-                th.template asx<Func,PointerAccess<T>>(in)();
-            }
-        }
-        else {
-            typedef typename TarOp::value_type T;
-            //IAccess<T,F<T>> tmp;
-            th.template asx<Func,PointerAccess<T>>(in)();
-        }
-    }
-    
-    template <typename T, class... Ranges>
-    template <class OpClass>
-    OperationRoot<T,Ranges...>& OperationRoot<T,Ranges...>::operator=(const OpClass& in)
-    {
-	vexec<OpClass::VABLE,identity<T>>(*this,in);
+	a(mInd, [](auto& a, const auto& b) { a = b; }, o)
         return *this;
     }
 
-    template <typename T, class... Ranges>
-    template <class OpClass>
-    OperationRoot<T,Ranges...>& OperationRoot<T,Ranges...>::operator+=(const OpClass& in)
+    template <typename T, class IndexT>
+    template <class Op>
+    constexpr OpRoot<T,IndexT>& OpRoot<T,IndexT>::operator+=(const Op& o)
     {
-	vexec<OpClass::VABLE,xplus<T>>(*this,in);
+	a(mInd, [](auto& a, const auto& b) { a += b; }, o)
         return *this;
     }
 
-    template <typename T, class... Ranges>
-    OperationRoot<T,Ranges...>& OperationRoot<T,Ranges...>::operator=(const OperationRoot<T,Ranges...>& in)
+    template <typename T, class IndexT>
+    constexpr OpRoot<T,IndexT>& OpRoot<T,IndexT>::operator=(const OpRoot<T,IndexT>& in)
     {
-	return operator=<OperationRoot<T,Ranges...> >(in);
-    }
-    /*
-    template <typename T, class... Ranges>
-    ParallelOperationRoot<T,Ranges...> OperationRoot<T,Ranges...>::par()
-    {
-        return ParallelOperationRoot<T,Ranges...>(mOrigDataPtr, mIndex);
-    }
-    */
-    template <typename T, class... Ranges>
-    template <class ET>
-    inline T& OperationRoot<T,Ranges...>::get(ET pos) const
-    {
-        return *mDataAcc.get(pos.val());
-    }
-
-    template <typename T, class... Ranges>
-    template <typename V, class ET>
-    inline V& OperationRoot<T,Ranges...>::vget(ET pos) const
-    {
-        return *(reinterpret_cast<V*>(mDataAcc.get(pos.val())));
-    }
-
-    template <typename T, class... Ranges>
-    template <class ET>
-    inline OperationRoot<T,Ranges...>& OperationRoot<T,Ranges...>::set(ET pos)
-    {
-        mDataAcc.set(pos.val());
-        mDataPtr = mOrigDataPtr + pos.val();
+	a(mInd, [](auto& a, const auto& b) { a = b; }, o)
 	return *this;
     }
 
-    template <typename T, class... Ranges>
-    MExt<None> OperationRoot<T,Ranges...>::rootSteps(std::intptr_t iPtrNum) const
+    template <typename T, class IndexT>
+    template <class PosT>
+    constexpr decltype(auto) OpRoot<T,IndexT>::get(const PosT& pos) const
     {
-	return MExt<None>(RangeHelper::getStepSize( mIndex, iPtrNum ));
+	if constexpr(is_epos_type<PosT>::value){
+	    return vreg(mData,pos); // distinguish between consecutive/non-consecutive
+	}
+	else {
+	    return mData[pos.val()];
+	}
     }
 
-    template <typename T, class... Ranges>
+    template <typename T, class IndexT>
+    template <SizeT I>
+    constexpr decltype(auto) OpRoot<T,IndexT>::rootSteps(const IndexId<I>& id) const
+    {
+	return mIndex->stepSize(id);
+    }
+
+    template <typename T, class IndexT>
     template <class Expr>
-    Expr OperationRoot<T,Ranges...>::loop(Expr exp) const
+    constexpr decltype(auto) OpRoot<T,IndexT>::loop(Xpr&& xpr) const;
     {
-	return exp;
+	return xpr;
     }
 
-    template <typename T, class... Ranges>
-    T* OperationRoot<T,Ranges...>::data() const
+    template <typename T, class IndexT>
+    T* OpRoot<T,IndexT>::data() const
     {
-        return mDataAcc.get(0);
-    }
-
-    template <typename T, class... Ranges>
-    template <class... Indices>
-    auto OperationRoot<T,Ranges...>::sl(const std::shared_ptr<Indices>&... inds)
-	-> Slice<T,typename Indices::RangeType...>
-    {
-	Slice<T,typename Indices::RangeType...> out(inds->range()...);
-	out.define(inds...) = *this;
-	return out;
+        return mData;
     }
 
 
diff --git a/src/include/operation/cxz_operation.h b/src/include/operation/cxz_operation.h
index 3b2f882..f67d762 100644
--- a/src/include/operation/cxz_operation.h
+++ b/src/include/operation/cxz_operation.h
@@ -68,7 +68,7 @@ namespace CNORXZ
     { static constexpr bool value = std::is_base_of<OpInterface,T>::value };
 
     template <typename T, class IndexT>
-    class COpRoot : public COpInterface<T,COpRoot<T,IndexT>>
+    class COpRoot : public COpInterface<COpRoot<T,IndexT>>
     {
     public:
 
@@ -85,192 +85,81 @@ namespace CNORXZ
 	constexpr decltype(auto) rootSteps(const IndexId<I>& id) const;
 	
 	template <class Xpr>
-	constexpr decltype(auto) loop(Xpr&& exp) const;
+	constexpr decltype(auto) loop(Xpr&& xpr) const;
 
 	const T* data() const;
 	
     private:
-	const T* mData;
+	const T* mData = nullptr;
 	Sptr<IndexType> mIndex;
     };
 
-    
-    template <class Range>
-    class MetaOperationRoot : public OperationTemplate<typename Range::MetaType,
-						       MetaOperationRoot<Range> >
+    template <typename T, class IndexT>
+    class OpCont : public OpInterface<OpCont<T,IndexT>>
     {
-    public:
-
-	typedef typename Range::IndexType IndexType;
-	typedef typename IndexType::MetaType value_type;
-	typedef OperationBase<value_type,MetaOperationRoot<Range> > OT;
-	
-	static constexpr size_t SIZE = 1;
-        static constexpr bool CONT = false;
-        static constexpr bool VABLE = false;
-        
-	MetaOperationRoot(const std::shared_ptr<IndexType>& ind);
-
-	template <class ET>
-	inline value_type get(ET pos) const;
-
-	template <typename V, class ET>
-	inline V vget(ET pos) const;
-
-	template <class ET>
-	inline MetaOperationRoot& set(ET pos);
-
-	MExt<None> rootSteps(std::intptr_t iPtrNum = 0) const; // nullptr for simple usage with decltype
-
-	template <class Expr>
-	Expr loop(Expr exp) const;
-		
-    private:
-
-        mutable IndexType mWorkIndex;
-        std::shared_ptr<IndexType> mIndex;
+	// operation container (intermediate operation results)
+	// TO BE IMPLEMENTED!!!
     };
-
-    template <typename T, class... Ranges>
-    class OperationRoot : public OperationTemplate<T,OperationRoot<T,Ranges...> >
+    
+    
+    template <typename T, class IndexT>
+    class OpRoot : public OpInterface<OpRoot<T,IndexT>>
     {
     public:
-
 	typedef T value_type;
-	typedef OperationBase<T,OperationRoot<T,Ranges...> > OT;
-	typedef ContainerRange<Ranges...> CRange;
-	typedef ConstContainerIndex<T,typename Ranges::IndexType...> IndexType;
+	typedef OpInterface<OpRoot<T,IndexT>> OI;
 
-	static constexpr size_t SIZE = 1;
-        static constexpr bool CONT = true;
-        static constexpr bool VABLE = true;
-
-    private:
-
-	T* mDataPtr;
-        T* mOrigDataPtr;
-        PointerAccess<T> mDataAcc;
-	IndexType mIndex;
-
-    public:
-	OperationRoot(MutableArrayBase<T,Ranges...>& ma,
-		      const std::shared_ptr<typename Ranges::IndexType>&... indices);
-
-	OperationRoot(MutableArrayBase<T,Ranges...>& ma,
-		      const std::tuple<std::shared_ptr<typename Ranges::IndexType>...>& indices);
-
-	OperationRoot(T* data, const IndexType& ind);
-
-        template <class Func, class Access, class OpClass>
-        auto asx(const OpClass& in) const;
-
-        template <class Func, class Access, class OpClass>
-        auto asxExpr(const OpClass& in) const;
+	constexpr OpRoot(MDArrayBase<T>& a, const Sptr<IndexT>& ind);
+	constexpr OpRoot(T* data, const Sptr<IndexT>& ind);
             
-        template <class Func, class Access, class OpClass, class Index>
-        auto asx(const OpClass& in, const std::shared_ptr<Index>& i) const;
-            
-        template <class OpClass>
-        auto assign(const OpClass& in) const;
+        template <class Op>
+        constexpr OpRoot& operator=(const Op& in);
 
-	template <class OpClass>
-        auto assignExpr(const OpClass& in) const;
-	    
-        template <class OpClass, class Index>
-        auto assign(const OpClass& in, const std::shared_ptr<Index>& i) const;
-	
-	template <class OpClass>
-        auto plus(const OpClass& in) const;
+        template <class Op>
+        constexpr OpRoot& operator+=(const Op& in);
 
-        template <class OpClass, class Index>
-        auto plus(const OpClass& in, const std::shared_ptr<Index>& i) const;
-            
-        template <class OpClass>
-        OperationRoot& operator=(const OpClass& in);
-
-        template <class OpClass>
-        OperationRoot& operator+=(const OpClass& in);
-
-        OperationRoot& operator=(const OperationRoot& in);
+        constexpr OpRoot& operator=(const OpRoot& in);
         
-	auto par() { return *this; }
-        
-	template <class ET>
-	inline T& get(ET pos) const;
+	template <class PosT>
+	constexpr decltype(auto) get(const PosT& pos) const;
 
-	template <typename V, class ET>
-	inline V& vget(ET pos) const;
-	
-	template <class ET>
-	inline OperationRoot& set(ET pos);
+	template <SizeT I>
+	constexpr decltype(auto) rootSteps(const IndexId<I>& id) const;
 
-	MExt<None> rootSteps(std::intptr_t iPtrNum = 0) const; // nullptr for simple usage with decltype
-
-	template <class Expr>
-	Expr loop(Expr exp) const;
+	template <class Xpr>
+	constexpr decltype(auto) loop(Xpr&& exp) const;
         
 	T* data() const;
-	
-	template <class... Indices>
-	auto sl(const std::shared_ptr<Indices>&... inds)
-	    -> Slice<T,typename Indices::RangeType...>;
-
-    };
-
-    template <typename T, class OpFunction, class... Ops>
-    class Operation : public OperationTemplate<T,Operation<T,OpFunction,Ops...> >
-    {
-    public:
-
-	typedef T value_type;
-	typedef OperationBase<T,Operation<T,OpFunction,Ops...> > OT;
-	typedef OpFunction F;
-	
-	static constexpr size_t SIZE = (... + Ops::SIZE);
-	static constexpr bool FISSTATIC = OpFunction::FISSTATIC;
-        static constexpr bool CONT = false;
-	static constexpr bool VABLE =
-	    (... and (Ops::VABLE and std::is_same<T,typename Ops::value_type>::value));
 
     private:
-	OperationTuple<Ops...> mOps;
-	std::shared_ptr<OpFunction> mF; // only if non-static
-	typedef decltype(mOps.rootSteps(0)) ExtType;
+	T* mData = nullptr;
+	Sptr<IndexT> mIndex;
 	
-    public:
-		
-	Operation(const Ops&... ops);
-	Operation(std::shared_ptr<OpFunction> ff, const Ops&... ops);
-
-	template <class ET>
-	inline auto get(ET pos) const;
-
-	template <typename V, class ET>
-	inline auto vget(ET pos) const;
-
-	template <class ET>
-	inline Operation& set(ET pos);
-	
-	auto rootSteps(std::intptr_t iPtrNum = 0) const
-	    -> ExtType; // nullptr for simple usage with decltype
-
-	template <class Expr>
-	auto loop(Expr exp) const;
-
-	T* data() const { assert(0); return nullptr; }
     };
     
-    template <class OpFunction, class... Ops>
-    auto mkOperation(const std::shared_ptr<OpFunction>& f, const Ops&... ops)
-	-> Operation<typename OpFunction::value_type,OpFunction,Ops...>
+
+    template <class F, class... Ops>
+    class Operation : public OpInterface<Operation<F,Ops...>>
     {
-	if constexpr(OpFunction::FISSTATIC){
-	    return Operation<typename OpFunction::value_type,OpFunction,Ops...>(ops...);
-	}
-	else {
-	    return Operation<typename OpFunction::value_type,OpFunction,Ops...>(f,ops...);
-	}
-    }
+    public:
+	typedef OpInterface<T,Operation<T,F,Ops...>> OI;
+
+	constexpr Operation(F&& f, Ops&&... ops);
+
+	template <class PosT>
+	constexpr decltype(auto) get(const PosT& pos) const;
+
+	template <SizeT I>
+	constexpr decltype(auto) rootSteps(const IndexId<I>& id) const
+
+	template <class Xpr>
+	constexpr decltype(auto) loop(Xpr&& xpr) const;
+
+    private:
+	Tuple<Ops...> mOps;
+	F mF;
+	
+    };
     
     template <typename T, class Op, class IndexType>
     class Contraction : public OperationTemplate<T,Contraction<T,Op,IndexType> >
@@ -316,7 +205,4 @@ namespace CNORXZ
     };
 }
 
-
-#include "type_operations.h"
-
 #endif