Add Fastor library

noarch/include/Fastor/tensor/PODConverters.h

@@ -0,0 +1,24 @@
+#ifndef PODCONVERTERS_H
+#define PODCONVERTERS_H
+
+FASTOR_INLINE T toscalar() const {
+    //! Returns a scalar
+    static_assert(size()==1,"ONLY TENSORS OF SIZE 1 CAN BE CONVERTED TO A SCALAR");
+    return (*_data);
+}
+
+FASTOR_INLINE std::array<T,size()> toarray() const {
+    //! Returns std::array
+    std::array<T,size()> out;
+    std::copy(_data,_data+size(),out.begin());
+    return out;
+}
+
+FASTOR_INLINE std::vector<T> tovector() const {
+    //! Returns std::vector
+    std::vector<T> out(size());
+    std::copy(_data,_data+size(),out.begin());
+    return out;
+}
+
+#endif //PODCONVERTERS_H