Feature: Smart STK Field Types

include/ElemDataRequestsGPU.h

@@ -258,7 +258,7 @@ auto&
 ElemDataRequestsGPU::get_coord_ptr(const T& fieldMgr, const U& iter) const
 {
   if constexpr (std::is_same_v<T, nalu::FieldManager>)
-    return fieldMgr.get_ngp_field_ptr(iter.second->name());
+    return fieldMgr.template get_ngp_field_ptr<double>(iter.second->name());
   else
     return fieldMgr.template get_field<double>(
       iter.second->mesh_meta_data_ordinal());
@@ -297,7 +297,7 @@ ElemDataRequestsGPU::get_field_ptr(
   const T& fieldMgr, const FieldInfo& finfo) const
 {
   if constexpr (std::is_same_v<T, nalu::FieldManager>)
-    return fieldMgr.get_ngp_field_ptr(finfo.field->name());
+    return fieldMgr.template get_ngp_field_ptr<double>(finfo.field->name());
   else
     return fieldMgr.template get_field<double>(
       finfo.field->mesh_meta_data_ordinal());

include/FieldManager.h

@@ -132,7 +132,8 @@ class FieldManager
 
   /// Given the named field that has already been registered on the CPU
   /// return the GPU version of the same field.
-  stk::mesh::NgpField<double>& get_ngp_field_ptr(std::string name) const
+  template<typename T>
+  stk::mesh::NgpField<T>& get_ngp_field_ptr(std::string name) const
   {
     FieldDefTypes fieldDef =
       FieldRegistry::query(numDimensions_, numStates_, name);
@@ -143,8 +144,8 @@ class FieldManager
           ->field_of_state(stk::mesh::FieldState::StateNone);
       },
       fieldDef);
-    stk::mesh::NgpField<double>& tmp =
-      stk::mesh::get_updated_ngp_field<double>(stkField);
+    stk::mesh::NgpField<T>& tmp =
+      stk::mesh::get_updated_ngp_field<T>(stkField);
     return tmp;
   }
 };