LazyCoupleable.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* 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

// MOOSE includes
#include "MooseVariableBase.h"

// Forward declarations
class InputParameters;
class MooseObject;
class MooseApp;

class LazyCoupleable
{
public:
  LazyCoupleable(const MooseObject * moose_object);

  virtual ~LazyCoupleable() = default;

  void setFEProblemPtr(FEProblemBase * fe_problem);

private:
  void init();

  unsigned int & coupled(const std::string & var_name, unsigned int comp = 0);

  // Reference to the interface's input parameters
  const InputParameters & _l_parameters;

  const std::string & _l_name;

  FEProblemBase * _l_fe_problem;

  MooseApp & _l_app;

  std::map<std::string, std::unique_ptr<unsigned int>> _coupled_var_numbers;
};