The main structure is tested. functons like execute and write are added and tested.

other components are left

src/PostprocessData/fieldsDataBase/fieldsDataBaseTemplates.cpp

@@ -0,0 +1,80 @@
+/*------------------------------- phasicFlow ---------------------------------
+      O        C enter of
+     O O       E ngineering and
+    O   O      M ultiscale modeling of
+   OOOOOOO     F luid flow
+------------------------------------------------------------------------------
+  Copyright (C): www.cemf.ir
+  email: hamid.r.norouzi AT gmail.com
+------------------------------------------------------------------------------
+Licence:
+  This file is part of phasicFlow code. It is a free software for simulating
+  granular and multiphase flows. You can redistribute it and/or modify it under
+  the terms of GNU General Public License v3 or any other later versions.
+
+  phasicFlow is distributed to help others in their research in the field of
+  granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+-----------------------------------------------------------------------------*/
+
+#ifndef __fieldsDataBaseTemplates_hpp__
+#define __fieldsDataBaseTemplates_hpp__
+
+#include "fieldsDataBase.hpp"
+
+template<pFlow::ValidFieldType T>
+inline
+pFlow::span<T> pFlow::fieldsDataBase::updateField(const word& name, bool forceUpdate)
+{
+  
+    bool shouldUpdate = checkForUpdate(name, forceUpdate);
+        
+    if(shouldUpdate)
+    {
+        if(name == "one")
+        {   
+            allFields_.emplaceBackOrReplace<FieldTypeHost<T>>
+            (
+                "one",
+                FieldTypeHost<T>
+                (
+                    "one", 
+                    "value",
+                    pointFieldSize(),
+                    T{1}
+                )
+            );
+        }
+        else if( name == "position")
+        {
+            if constexpr( std::same_as<T, realx3>)
+            {
+                return updatePoints(forceUpdate);            
+            }
+            else
+            {
+                fatalErrorInFunction<< "Error in getting the type name of field: "<<
+                    name<<", with type name: "<< getTypeName<T>() <<endl;
+                fatalExit;
+                return span<T>(nullptr, 0);
+            }
+        }
+        else
+        {
+            const auto& pField = time_.lookupObject<pointField_D<T>>(name);
+            allFields_.emplaceBackOrReplace<FieldTypeHost<T>>(
+            name, 
+            pField.activeValuesHost());
+        }
+    }
+
+    auto& field = allFields_.getObject<FieldTypeHost<T>>(name);
+    
+    return span<T>(
+        field.data(), 
+        field.size());
+    
+}
+
+#endif //__fieldsDataBaseTemplates_hpp__