loss_visitor.hpp

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#ifndef MLPACK_METHODS_ANN_VISITOR_LOSS_VISITOR_HPP
#define MLPACK_METHODS_ANN_VISITOR_LOSS_VISITOR_HPP

#include <mlpack/methods/ann/layer/layer_traits.hpp>

#include <boost/variant.hpp>

namespace mlpack {
namespace ann {

class LossVisitor : public boost::static_visitor<double>
{
 public:
  template<typename LayerType>
  double operator()(LayerType* layer) const;

  double operator()(MoreTypes layer) const;

 private:
  template<typename T>
  typename std::enable_if<
      !HasLoss<T, double(T::*)()>::value &&
      !HasModelCheck<T>::value, double>::type
  LayerLoss(T* layer) const;

  template<typename T>
  typename std::enable_if<
      HasLoss<T, double(T::*)()>::value &&
      !HasModelCheck<T>::value, double>::type
  LayerLoss(T* layer) const;

  template<typename T>
  typename std::enable_if<
      !HasLoss<T, double(T::*)()>::value &&
      HasModelCheck<T>::value, double>::type
  LayerLoss(T* layer) const;

  template<typename T>
  typename std::enable_if<
      HasLoss<T, double(T::*)()>::value &&
      HasModelCheck<T>::value, double>::type
  LayerLoss(T* layer) const;
};

} // namespace ann
} // namespace mlpack

// Include implementation.
#include "loss_visitor_impl.hpp"

#endif