innerStatementEvaluator.hpp

/*
 * CoDiPack, a Code Differentiation Package
 *
 * Copyright (C) 2015-2024 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 <algorithm>
#include <functional>
#include <type_traits>
 
#include "../../expressions/activeType.hpp"
#include "../../misc/macros.hpp"
#include "../../traits/expressionTraits.hpp"
#include "directStatementEvaluator.hpp"
#include "statementEvaluatorInterface.hpp"
 
namespace codi {
 
  struct InnerPrimalTapeStatementData : public PrimalTapeStatementFunctions {
    public:
 
      using Base = PrimalTapeStatementFunctions;  
 
      size_t maxActiveArguments;    
      size_t maxConstantArguments;  
 
      InnerPrimalTapeStatementData(size_t maxActiveArguments, size_t maxConstantArguments,
                                   typename Base::Handle forward, typename Base::Handle primal,
                                   typename Base::Handle reverse, typename Base::Handle writeInformation)
          : Base(forward, primal, reverse, writeInformation),
            maxActiveArguments(maxActiveArguments),
            maxConstantArguments(maxConstantArguments) {}
  };
 
  template<typename Tape, typename Expr>
  struct InnerStatementEvaluatorStaticStore {
    public:
 
      static InnerPrimalTapeStatementData const staticStore;  
  };
 
  template<typename Generator, typename Expr>
  InnerPrimalTapeStatementData const InnerStatementEvaluatorStaticStore<Generator, Expr>::staticStore(
      ExpressionTraits::NumberOfActiveTypeArguments<Expr>::value,
      ExpressionTraits::NumberOfConstantTypeArguments<Expr>::value,
      (typename PrimalTapeStatementFunctions::Handle)Generator::template statementEvaluateForwardInner<Expr>,
      (typename PrimalTapeStatementFunctions::Handle)Generator::template statementEvaluatePrimalInner<Expr>,
      (typename PrimalTapeStatementFunctions::Handle)Generator::template statementEvaluateReverseInner<Expr>,
      (typename PrimalTapeStatementFunctions::Handle)Generator::template statementGetWriteInformation<Expr>);
 
  template<typename T_Real>
  struct InnerStatementEvaluator : public StatementEvaluatorInterface<T_Real> {
    public:
 
      using Real = CODI_DD(T_Real, double);  
 
      /*******************************************************************************/
 
      using Handle = InnerPrimalTapeStatementData const*;  
 
      template<typename Tape, typename... Args>
      static Real callForward(Handle const& h, Args&&... args) {
        return Tape::statementEvaluateForwardFull((FunctionForward<Tape>)h->forward, h->maxActiveArguments,
                                                  h->maxConstantArguments, std::forward<Args>(args)...);
      }
 
      template<typename Tape, typename... Args>
      static Real callPrimal(Handle const& h, Args&&... args) {
        return Tape::statementEvaluatePrimalFull((FunctionPrimal<Tape>)h->primal, h->maxActiveArguments,
                                                 h->maxConstantArguments, std::forward<Args>(args)...);
      }
 
      template<typename Tape, typename... Args>
      static void callReverse(Handle const& h, Args&&... args) {
        Tape::statementEvaluateReverseFull((FunctionReverse<Tape>)h->reverse, h->maxActiveArguments,
                                           h->maxConstantArguments, std::forward<Args>(args)...);
      }
 
      template<typename Tape, typename Generator, typename Expr>
      static Handle createHandle() {
        return &InnerStatementEvaluatorStaticStore<Generator, Expr>::staticStore;
      }
 
      template<typename Tape, typename... Args>
      static WriteInfo getWriteInformation(Handle const& h, Args&&... args) {
        return ((FunctionWriteInformation<Tape>)h->writeInformation)(std::forward<Args>(args)...);
      }
 
 
    protected:
 
      template<typename Tape>
      using FunctionForward = decltype(&Tape::template statementEvaluateForwardInner<ActiveType<Tape>>);
 
      template<typename Tape>
      using FunctionPrimal = decltype(&Tape::template statementEvaluatePrimalInner<ActiveType<Tape>>);
 
      template<typename Tape>
      using FunctionReverse = decltype(&Tape::template statementEvaluateReverseInner<ActiveType<Tape>>);
 
      template<typename Tape>
      using FunctionWriteInformation = decltype(&Tape::template statementGetWriteInformation<ActiveType<Tape>>);
  };
}