ParsedODEKernel.h

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//* This file is part of the MOOSE framework
//* https://www.mooseframework.org
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#pragma once

#include "ODEKernel.h"
#include "FunctionParserUtils.h"

class ParsedODEKernel : public ODEKernel, public FunctionParserUtils<false>
{
public:
  static InputParameters validParams();

  ParsedODEKernel(const InputParameters & parameters);

protected:
  void updateParams();

  virtual Real computeQpResidual() override;
  virtual Real computeQpJacobian() override;
  virtual Real computeQpOffDiagJacobianScalar(unsigned int jvar) override;

  std::string _function;

  unsigned int _nargs;
  std::vector<const VariableValue *> _args;
  std::vector<std::string> _arg_names;

  SymFunctionPtr _func_F;
  SymFunctionPtr _func_dFdu;

  std::vector<SymFunctionPtr> _func_dFdarg;

  const unsigned int _number_of_nl_variables;

  std::vector<const PostprocessorValue *> _pp;

  usingFunctionParserUtilsMembers(false);

private:
  std::vector<unsigned int> _arg_index;
};