crange.basic test works

src/include/base/dtype.cc.h

@@ -15,6 +15,7 @@ namespace CNORXZ
     DType::DType(const T& d) : mD(d)
     {
 	_mkToStr<T>();
+	_mkComp<T>();
     }
 
     template <typename T>
@@ -22,6 +23,7 @@ namespace CNORXZ
     {
 	mD = d;
 	_mkToStr<T>();
+	_mkComp<T>();
 	return *this;
     }
 
@@ -43,10 +45,10 @@ namespace CNORXZ
 	    else {
 		auto& at = std::any_cast<const T&>(a);
 		auto& dt = std::any_cast<const T&>(mD);
-		if(std::equal_to(dt,at)){
+		if(std::equal_to<T>{}(dt,at)){
 		    return 0;
 		}
-		else if(std::less(dt,at)){
+		else if(std::less<T>{}(dt,at)){
 		    return -1;
 		}
 		else {

src/include/base/dtype.h

@@ -35,7 +35,7 @@ namespace CNORXZ
 	template <typename T>
 	DType& operator=(const T& d);
 
-	std::string str() const { return mToStr(); }
+	String str() const { return mToStr(); }
 	const std::any& get() const { return mD; }
 
 	bool operator==(const DType& a) const { return mComp(a.mD) == 0; }

src/include/ranges/index_base.cc.h

@@ -100,6 +100,36 @@ namespace CNORXZ
 	assert(mPtrId == reinterpret_cast<PtrId>(this));
 	return mPtrId;
     }
+
+    /****************************
+     *   Non-member functions   *
+     ****************************/
+    
+    template <class I, typename MetaType>
+    IndexPtr<I,MetaType>& operator++(const IndexPtr<I,MetaType>& i)
+    {
+	++(*i);
+	return i;
+    }
+
+    template <class I, typename MetaType>
+    IndexPtr<I,MetaType>& operator--(const IndexPtr<I,MetaType>& i)
+    {
+	--(*i);
+	return i;
+    }
+
+    template <class I, typename MetaType>
+    IndexPtr<I,MetaType> operator+(const IndexPtr<I,MetaType>& i, Int n)
+    {
+	return std::make_shared<IndexInterface<I,MetaType>>( *i + n );
+    }
+
+    template <class I, typename MetaType>
+    IndexPtr<I,MetaType> operator-(const IndexPtr<I,MetaType>& i, Int n)
+    {
+	return std::make_shared<IndexInterface<I,MetaType>>( *i - n );
+    }
 }
 
 #endif

src/include/ranges/index_base.h

@@ -59,6 +59,9 @@ namespace CNORXZ
 	auto iforh(SizeT step, const Expr ex) const
 	{ return THIS().template iforh<Expr>(step,ex); }
 	*/
+    protected:
+	SizeT mPos = 0;
+	
     private:
 	friend I; // why not protected???!!!
 	
@@ -70,10 +73,15 @@ namespace CNORXZ
 	IndexInterface& operator=(IndexInterface&& in);
 	IndexInterface(SizeT pos);
 
-	SizeT mPos = 0;
 	PtrId mPtrId = 0;
     };
 
+    template <class I, typename MetaType>
+    IndexPtr<I,MetaType>& operator++(const IndexPtr<I,MetaType>& i);
+
+    template <class I, typename MetaType>
+    IndexPtr<I,MetaType>& operator--(const IndexPtr<I,MetaType>& i);
+    
     // to define relative indices:
     template <class I, typename MetaType>
     IndexPtr<I,MetaType> operator+(const IndexPtr<I,MetaType>& i, Int n);

src/include/ranges/xindex.cc.h

@@ -6,21 +6,26 @@
 
 namespace CNORXZ
 {
+
     /**************
      *   XIndex   *
      **************/
     
     template <class Index, typename Meta>
-    XIndex<Index,Meta>::XIndex(const IndexPtr<Index,Meta>& i) : mI(i) {}
+    XIndex<Index,Meta>::XIndex(const IndexPtr<Index,Meta>& i) :
+	XIndexBase(i->pos()),
+	mI(i) {}
 
     template <class Index, typename Meta>
     XIndex<Index,Meta>::XIndex(const IndexInterface<Index,Meta>& i) :
+	XIndexBase(i.pos()),
 	mI(std::make_shared<Index>(i.THIS())) {}
 
     template <class Index, typename Meta>
     XIndex<Index,Meta>& XIndex<Index,Meta>::operator=(SizeT pos)
     {
 	*mI = pos;
+	IB::mPos = mI->pos();
 	return *this;
     }
 
@@ -28,6 +33,7 @@ namespace CNORXZ
     XIndex<Index,Meta>& XIndex<Index,Meta>::operator++()
     {
 	++(*mI);
+	IB::mPos = mI->pos();
 	return *this;
     }
 
@@ -35,19 +41,64 @@ namespace CNORXZ
     XIndex<Index,Meta>& XIndex<Index,Meta>::operator--()
     {
 	--(*mI);
+	IB::mPos = mI->pos();
 	return *this;
     }
 
+    template <class Index, typename Meta>
+    Sptr<XIndexBase> XIndex<Index,Meta>::operator+(Int n) const
+    {
+	return std::make_shared<XIndex<Index,Meta>>(*mI + n);
+    }
+    
+    template <class Index, typename Meta>
+    Sptr<XIndexBase> XIndex<Index,Meta>::operator-(Int n) const
+    {
+	return std::make_shared<XIndex<Index,Meta>>(*mI - n);
+    }
+    
+    template <class Index, typename Meta>
+    XIndex<Index,Meta>& XIndex<Index,Meta>::operator+=(Int n)
+    {
+	(*mI) += n;
+	IB::mPos = mI->pos();
+	return *this;
+    }
+    
+    template <class Index, typename Meta>
+    XIndex<Index,Meta>& XIndex<Index,Meta>::operator-=(Int n)
+    {
+	(*mI) -= n;
+	IB::mPos = mI->pos();
+	return *this;
+    }
+
+    template <class Index, typename Meta>
+    DType XIndex<Index,Meta>::operator*() const
+    {
+	return DType(*(*mI));
+    }
+    
+    template <class Index, typename Meta>
+    DType XIndex<Index,Meta>::operator->() const
+    {
+	return DType(*(*mI));
+    }
+
     template <class Index, typename Meta>
     Int XIndex<Index,Meta>::pp(PtrId idxPtrNum)
     {
-	return mI->pp(idxPtrNum);
+	Int out = mI->pp(idxPtrNum);
+	IB::mPos = mI->pos();
+	return out;
     }
 
     template <class Index, typename Meta>
     Int XIndex<Index,Meta>::mm(PtrId idxPtrNum)
     {
-	return mI->mm(idxPtrNum);
+	Int out = mI->mm(idxPtrNum);
+	IB::mPos = mI->pos();
+	return out;
     }
 
     template <class Index, typename Meta>
@@ -56,6 +107,12 @@ namespace CNORXZ
 	return mI->dim();
     }
 
+    template <class Index, typename Meta>
+    RangePtr XIndex<Index,Meta>::range() const
+    {
+	return mI->range();
+    }
+
     template <class Index, typename Meta>
     SizeT XIndex<Index,Meta>::getStepSize(SizeT n) const
     {
@@ -79,6 +136,7 @@ namespace CNORXZ
     {
 	// check!!!
 	mI->at(std::any_cast<const Meta&>(meta.get()));
+	IB::mPos = mI->pos();
 	return *this;
     }
     /*

src/include/ranges/xindex.h

@@ -12,48 +12,82 @@ namespace CNORXZ
     class XIndexBase : public IndexInterface<XIndexBase,DType>
     {
     public:
+	typedef IndexInterface<XIndexBase,DType> IB;
+	
 	DEFAULT_MEMBERS(XIndexBase);
-
+	XIndexBase(SizeT pos) : IndexInterface<XIndexBase,DType>(pos) {}
+	
 	virtual XIndexBase& operator=(SizeT pos) = 0;
 	virtual XIndexBase& operator++() = 0;
 	virtual XIndexBase& operator--() = 0;
+	virtual Sptr<XIndexBase> operator+(Int n) const = 0;
+	virtual Sptr<XIndexBase> operator-(Int n) const = 0;
+	virtual XIndexBase& operator+=(Int n) = 0;
+	virtual XIndexBase& operator-=(Int n) = 0;
+
+	virtual DType operator*() const = 0;
+	virtual DType operator->() const = 0;
+
 	virtual Int pp(PtrId idxPtrNum) = 0;
 	virtual Int mm(PtrId idxPtrNum) = 0;
-	virtual size_t dim() const = 0;
+
-	virtual size_t getStepSize(SizeT n) const = 0;
+	virtual SizeT dim() const = 0;
+	virtual RangePtr range() const = 0;
+	virtual SizeT getStepSize(SizeT n) const = 0;
+
 	virtual String stringMeta() const = 0;
 	virtual DType meta() const = 0;
 	virtual XIndexBase& at(const DType& meta) = 0;
+
 	//virtual DExpr ifor(SizeT step, DExpr ex) const = 0;
 	//virtual DExpr iforh(SizeT step, DExpr ex) const = 0;
 	// ...!!!
     };
 
+    //Sptr<XIndexBase>& operator++(Sptr<XIndexBase>& i);
+    //Sptr<XIndexBase>& operator--(Sptr<XIndexBase>& i);
+    
     // MultiIndex Wrapper:
     template <class Index, typename Meta>
     class XIndex : public XIndexBase
     {
-    private:
-	IndexPtr<Index,Meta> mI;
-
     public:
+	typedef XIndexBase XIB;
+	typedef XIB::IB IB;
+	
 	DEFAULT_MEMBERS(XIndex);
 	XIndex(const IndexPtr<Index,Meta>& i);
 	XIndex(const IndexInterface<Index,Meta>& i);
 
-	virtual XIndex& operator=(SizeT pos) override;
+	virtual XIndex& operator=(SizeT pos) override final;
-	virtual XIndex& operator++() override;
+	virtual XIndex& operator++() override final;
-	virtual XIndex& operator--() override;
+	virtual XIndex& operator--() override final;
-	virtual Int pp(PtrId idxPtrNum) override;
+	virtual Sptr<XIndexBase> operator+(Int n) const override final;
-	virtual Int mm(PtrId idxPtrNum) override;
+	virtual Sptr<XIndexBase> operator-(Int n) const override final;
-	virtual SizeT dim() const override;
+	virtual XIndex& operator+=(Int n) override final;
-	virtual SizeT getStepSize(SizeT n) const override;
+	virtual XIndex& operator-=(Int n) override final;
-	virtual String stringMeta() const override;
+
-	virtual DType meta() const override;
+	virtual DType operator*() const override final;
-	virtual XIndexBase& at(const DType& meta) override;
+	virtual DType operator->() const override final;
-	//virtual DExpr ifor(SizeT step, DExpr ex) const override;
+
-	//virtual DExpr iforh(SizeT step, DExpr ex) const override;
+	virtual Int pp(PtrId idxPtrNum) override final;
+	virtual Int mm(PtrId idxPtrNum) override final;
+
+	virtual SizeT dim() const override final;
+	virtual RangePtr range() const override final;
+	virtual SizeT getStepSize(SizeT n) const override final;
+
+	virtual String stringMeta() const override final;
+	virtual DType meta() const override final;
+	virtual XIndexBase& at(const DType& meta) override final;
+
+	//virtual DExpr ifor(SizeT step, DExpr ex) const override final;
+	//virtual DExpr iforh(SizeT step, DExpr ex) const override final;
 	// ....!!!!
+
+    private:
+	IndexPtr<Index,Meta> mI;
+
     };
 
 }

src/tests/range_unit_test.cc

@@ -27,9 +27,40 @@ namespace {
     TEST_F(CR_Test, Basics)
     {
 	auto cr = CRangeFactory(mSize).create();
+	auto crx = std::dynamic_pointer_cast<CRange>(cr);
 	EXPECT_EQ(cr->size(), mSize);
+	EXPECT_EQ(crx->size(), mSize);
+
+	EXPECT_EQ(crx->begin() != crx->end(), true);
+	EXPECT_EQ(crx->begin().pos(), 0);
+	EXPECT_EQ(crx->end().pos(), mSize);
+
+	EXPECT_EQ(*cr->begin() != *cr->end(), true);
+	EXPECT_EQ(cr->begin()->pos(), 0);
+	EXPECT_EQ(cr->end()->pos(), mSize);
+
+	
+	SizeT cnt = 0;
+	auto endxi = cr->end();
+	for(auto xi = cr->begin(); *xi != *endxi; ++(*xi)){
+	    EXPECT_EQ(xi->pos(), cnt);
+	    EXPECT_EQ(*(*xi), cnt);
+	    ++cnt;
+	}
+	
+	SizeT cnt2 = 0;
+	for(auto x: *crx){
+	    EXPECT_EQ(x, cnt2++);
+	}
+	
     }
 
     // UR_Test
     // RCast_Test
 }
+
+int main(int argc, char** argv)
+{
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}