activeType.hpp

/*
 * CoDiPack, a Code Differentiation Package
 *
 * Copyright (C) 2015-2025 Chair for Scientific Computing (SciComp), University of Kaiserslautern-Landau
 * Homepage: http://scicomp.rptu.de
 * Contact:  Prof. Nicolas R. Gauger (codi@scicomp.uni-kl.de)
 *
 * Lead developers: Max Sagebaum, Johannes Blühdorn (SciComp, University of Kaiserslautern-Landau)
 *
 * This file is part of CoDiPack (http://scicomp.rptu.de/software/codi).
 *
 * CoDiPack is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * CoDiPack is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * See the GNU General Public License for more details.
 * You should have received a copy of the GNU
 * General Public License along with CoDiPack.
 * If not, see <http://www.gnu.org/licenses/>.
 *
 * For other licensing options please contact us.
 *
 * Authors:
 *  - SciComp, University of Kaiserslautern-Landau:
 *    - Max Sagebaum
 *    - Johannes Blühdorn
 *    - Former members:
 *      - Tim Albring
 */
#pragma once
 
#include "activeTypeBase.hpp"

namespace codi {

  template<typename T_Tape>
  struct ActiveType : public ActiveTypeBase<T_Tape, ActiveType<T_Tape>> {
    public:
 
      using Tape = CODI_DD(T_Tape, CODI_DEFAULT_TAPE);  
 
      using Base = ActiveTypeBase<T_Tape, ActiveType>;  
 
      using typename Base::Gradient;     
      using typename Base::Identifier;   
      using typename Base::PassiveReal;  
      using typename Base::Real;         
 
      using typename Base::ADLogic;  
      using typename Base::StoreAs;  
 
    private:
 
      static Tape tape;
 
    public:

      CODI_INLINE ActiveType(ActiveType<Tape> const& v) : Base(static_cast<Base const&>(v)) {}
 
      using Base::Base;  // Use constructors from base class.

      CODI_INLINE ~ActiveType() {}
 
      /*******************************************************************************/

      CODI_INLINE ActiveType& operator=(ActiveType const& v) {
        static_cast<Base&>(*this) = static_cast<Base const&>(v);
        return *this;
      }
 
      using Base::operator=;

      /*******************************************************************************/

      static CODI_INLINE Tape& getTape() {
        return tape;
      }

  };
 
  // clang-format off
  template<typename Tape>
  CODI_DD(Tape, CODI_DEFAULT_TAPE) ActiveType<Tape>::tape{};
  // clang-format on

  template<typename T_Real, typename T_Tape>
  struct ExpressionTraits::ActiveResultImpl<T_Real, T_Tape, false> {
    public:
 
      using Real = CODI_DD(T_Real, CODI_ANY);  
      using Tape = CODI_DD(T_Tape, CODI_ANY);  

      using ActiveResult = ActiveType<Tape>;
  };
}