.. _program_listing_file_src_pcms_transfer_copy.h:

Program Listing for File copy.h
===============================

|exhale_lsh| :ref:`Return to documentation for file <file_src_pcms_transfer_copy.h>` (``src/pcms/transfer/copy.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #ifndef PCMS_TRANSFER_FIELD2_H_
   #define PCMS_TRANSFER_FIELD2_H_
   #include "pcms/field/field.h"
   #include "pcms/field/field_data.h"
   #include "pcms/field/function_space.h"
   #include "pcms/utility/assert.h"
   #include "pcms/utility/profile.h"
   #include "pcms/utility/types.h"
   #include "pcms/transfer/transfer_operator.hpp"
   #include <Kokkos_Core.hpp>
   #include <Kokkos_StdAlgorithms.hpp>
   
   namespace pcms
   {
   
   namespace detail
   {
   
   template <typename T>
   void CheckCopyCompatible(const Field<T>& source, const Field<T>& target)
   {
     if (&source.GetLayout() != &target.GetLayout()) {
       throw pcms_error("Copy: source and target layouts differ");
     }
     const auto& sd = source.GetData();
     const auto& td = target.GetData();
     if (sd.GetValueType() != td.GetValueType() ||
         !SameValueBasis(sd.GetValueBasis(), td.GetValueBasis())) {
       throw pcms_error("Copy: source and target value type/basis differ");
     }
   }
   
   } // namespace detail
   
   template <typename T>
   class Copy : public TransferOperator<T>
   {
   public:
     Copy(const FunctionSpace& source_space, const FunctionSpace& target_space)
     {
       auto source_layout = source_space.GetLayout();
       auto target_layout = target_space.GetLayout();
       if (source_layout.get() != target_layout.get()) {
         throw pcms_error("Copy: source and target function spaces have "
                          "different layouts");
       }
     }
   
     void Apply(const Field<T>& source, Field<T>& target) const override
     {
       PCMS_FUNCTION_TIMER;
       detail::CheckCopyCompatible(source, target);
       target.SetDOFHolderData(source.GetDOFHolderData());
     }
   };
   
   } // namespace pcms
   
   #endif // PCMS_TRANSFER_FIELD2_H_