From e9fde3d90093df8b0e89cc48e8374984be34659b Mon Sep 17 00:00:00 2001
From: Christian Zimmermann <christian.zimmermann@ur.de>
Date: Mon, 29 May 2023 23:05:47 +0200
Subject: [PATCH] srange casts + add first eindex implementation

---
 src/include/ranges/eindex.cc.h | 28 ++++++++++++++++++++++++++++
 src/include/ranges/eindex.h    | 29 +++++++++++++++++++++++++++++
 src/include/ranges/srange.cc.h | 22 ++++++++++++++++++++++
 3 files changed, 79 insertions(+)
 create mode 100644 src/include/ranges/eindex.cc.h
 create mode 100644 src/include/ranges/eindex.h

diff --git a/src/include/ranges/eindex.cc.h b/src/include/ranges/eindex.cc.h
new file mode 100644
index 0000000..a566125
--- /dev/null
+++ b/src/include/ranges/eindex.cc.h
@@ -0,0 +1,28 @@
+
+#ifndef __cxz_eindex_cc_h__
+#define __cxz_eindex_cc_h__
+
+#include "eindex.h"
+
+namespace CNORXZ
+{
+    
+    template <typename MetaT, SizeT S>
+    EIndex<MetaT,S>::EIndex(const SIndex<MetaT,S>& i) :
+	SIndex<MetaT,S>(i) {}
+
+    template <typename MetaT, SizeT S>
+    EIndex<MetaT,S>::EIndex(SIndex<MetaT,S>&& i) :
+	SIndex<MetaT,S>(i) {}
+
+    template <typename MetaT, SizeT S>
+    template <class Xpr, class F>
+    decltype(auto) EIndex<MetaT,S>::ifor(const Xpr& xpr, F&& f) const
+    {
+	// TODO: EFor Function argument; meanwhile ignore unused function error!!!
+	return EFor<S,0,Xpr>(this->id(), xpr);
+    }
+
+}
+
+#endif
diff --git a/src/include/ranges/eindex.h b/src/include/ranges/eindex.h
new file mode 100644
index 0000000..75b498c
--- /dev/null
+++ b/src/include/ranges/eindex.h
@@ -0,0 +1,29 @@
+
+#ifndef __cxz_eindex_h__
+#define __cxz_eindex_h__
+
+#include "base/base.h"
+#include "ranges/index_base.h"
+#include "ranges/range_base.h"
+#include "xpr/xpr.h"
+
+namespace CNORXZ
+{
+    template <typename MetaT, SizeT S>
+    class EIndex : public SIndex<MetaT,S>
+    {
+    public:
+	typedef typename SIndex<MetaT,S>::IB IB;
+	typedef typename SIndex<MetaT,S>::RangeType RangeType;
+
+	DEFAULT_MEMBERS(EIndex);
+	EIndex(const SIndex<MetaT,S>& i);
+	EIndex(SIndex<MetaT,S>&& i);
+
+	template <class Xpr, class F>
+	decltype(auto) ifor(const Xpr& xpr, F&& f) const;
+    };
+    
+}
+
+#endif
diff --git a/src/include/ranges/srange.cc.h b/src/include/ranges/srange.cc.h
index e753435..7efd4f9 100644
--- a/src/include/ranges/srange.cc.h
+++ b/src/include/ranges/srange.cc.h
@@ -289,6 +289,28 @@ namespace CNORXZ
 	return Vector<Uuid> { this->id() };
     }
 
+    /*******************
+     *   Range Casts   *
+     *******************/
+
+    template <typename MetaType, SizeT S>
+    Sptr<SRange<MetaType,S>> RangeCast<SRange<MetaType,S>>::func(const RangePtr& r)
+    {
+	Sptr<URange<MetaType>> tmp;
+	if(r->type() != typeid(URange<MetaType>)){
+	    tmp = castRange<URange<MetaType>>(r);
+	}
+	else {
+	    tmp = r;
+	}
+	CXZ_ASSERT(tmp->size() == S, "cannot cast range of size " << tmp->size()
+		   << " into static range of size " << S);
+	Arr<MetaType,S> space;
+	std::copy(tmp->begin(), tmp->end(), space.begin());
+	return std::dynamic_pointer_cast<SRange<MetaType,S>>
+	    ( SRangeFactory<MetaType,S>(std::move(space)).create() );
+    }
+    
 }
 
 #endif