registered_component_lookup.h

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//    |  /           |
//    ' /   __| _` | __|  _ \   __|
//    . \  |   (   | |   (   |\__ `
//   _|\_\_|  \__,_|\__|\___/ ____/
//                   Multi-Physics
//
//  License:         BSD License
//                   license: HDF5Application/license.txt
//
//  Main author:    Michael Andre, https://github.com/msandre
//
 
#if !defined(KRATOS_REGISTERED_COMPONENT_LOOKUP_H_INCLUDED)
#define KRATOS_REGISTERED_COMPONENT_LOOKUP_H_INCLUDED
 
// System includes
#include <string>
 
// External includes
 
// Project includes
#include "includes/define.h"
#include "includes/kratos_components.h"
 
// Application includes
 
namespace Kratos
{
 
 
template <typename ...TVariables> 
class RegisteredComponentLookup
{
    template <template<typename T> class TFunctor, typename ...Targs>
    struct FunctorWrapper
    {
        template <typename TVariable>
        void Execute(std::string const& rName, bool& found, Targs&... args)
        {
            if (!found && KratosComponents<TVariable>::Has(rName))
            {
                const TVariable& rVariable = KratosComponents<TVariable>::Get(rName);
                TFunctor<TVariable>()(rVariable, args...);
                found = true;
            }
        }
    };
 
public:
    explicit RegisteredComponentLookup(std::string const& rName) : mName(rName)
    {}
 
  template <template<typename T> class TFunctor, typename ...Targs>
  void Execute(Targs&... args)
  {
      bool found = false;
      int dummy[sizeof...(TVariables)] = {(FunctorWrapper<TFunctor, Targs...>().template Execute<TVariables>(mName, found, args...), 0)...};
      ignore_unused_variable_warning(dummy);
      KRATOS_ERROR_IF(!found) << "Variable \"" << mName << "\" was not found.\n";
  }
 
  private:
  std::string mName;
 
  void ignore_unused_variable_warning(int[]) {}
};
 
} // namespace Kratos.
 
#endif // KRATOS_REGISTERED_COMPONENT_LOOKUP_H_INCLUDED defined