Panzer_TensorToStdVector_decl.hpp

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// @HEADER
// *****************************************************************************
//           Panzer: A partial differential equation assembly
//       engine for strongly coupled complex multiphysics systems
//
// Copyright 2011 NTESS and the Panzer contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef PANZER_EVALUATOR_TENSOR_TO_STD_VECTOR_DECL_HPP
#define PANZER_EVALUATOR_TENSOR_TO_STD_VECTOR_DECL_HPP

#include <vector>
#include <string>

#include "Phalanx_Evaluator_Macros.hpp"
#include "Phalanx_MDField.hpp"

namespace panzer {
    
template<typename EvalT, typename Traits>
class TensorToStdVector
  :
  public PHX::EvaluatorWithBaseImpl<Traits>,
  public PHX::EvaluatorDerived<EvalT, Traits>
{
  public:

    TensorToStdVector(
      const Teuchos::ParameterList& p);

    void
    evaluateFields(
      typename Traits::EvalData d);

  private:

    using ScalarT = typename EvalT::ScalarT;

    PHX::MDField<const ScalarT,Cell,Point,Dim,Dim> tensor_field;

    std::vector<PHX::MDField<ScalarT,Cell,Point,Dim> > vector_fields;

}; // end of class TensorToStdVector


template <typename EvalT,typename Traits>
Teuchos::RCP<PHX::Evaluator<Traits> > tensorToStdVectorEvaluator(const std::string & tensorName,
                                                              const std::string & vectorPrefix,
                                                              const std::vector<std::string> & postfix,
                                                              const Teuchos::RCP<const PHX::DataLayout> & tensorLayout,
                                                              const Teuchos::RCP<const PHX::DataLayout> & vectorLayout)
{
  using Teuchos::RCP;
  using Teuchos::rcp;
  using Teuchos::rcp_const_cast;

  RCP<std::vector<std::string> > vectorNames = rcp(new std::vector<std::string>);
  for(std::size_t i=0;i<postfix.size();i++)
    vectorNames->push_back(vectorPrefix+postfix[i]);

  Teuchos::ParameterList input;
  input.set("Tensor Name", tensorName);
  input.set("Vector Names", vectorNames.getConst());
  input.set("Data Layout Tensor",rcp_const_cast<PHX::DataLayout>(tensorLayout));
  input.set("Data Layout Vector",rcp_const_cast<PHX::DataLayout>(vectorLayout));

  return rcp(new TensorToStdVector<EvalT,Traits>(input));
}

template <typename EvalT,typename Traits>
Teuchos::RCP<PHX::Evaluator<Traits> > tensorToStdVectorEvaluator(const std::string & tensorName,
                                                              const std::vector<std::string> & postfix,
                                                              const Teuchos::RCP<const PHX::DataLayout> & tensorLayout,
                                                              const Teuchos::RCP<const PHX::DataLayout> & vectorLayout)
{
  return tensorToStdVectorEvaluator<EvalT,Traits>(tensorName,tensorName,postfix,tensorLayout,vectorLayout);
}

}

#endif