reward_set_visitor.hpp

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#ifndef MLPACK_METHODS_ANN_VISITOR_REWARD_SET_VISITOR_HPP
#define MLPACK_METHODS_ANN_VISITOR_REWARD_SET_VISITOR_HPP

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

#include <boost/variant.hpp>

namespace mlpack {
namespace ann {

class RewardSetVisitor : public boost::static_visitor<void>
{
 public:
  RewardSetVisitor(const double reward);

  template<typename LayerType>
  void operator()(LayerType* layer) const;

 private:
  const double reward;

  template<typename T>
  typename std::enable_if<
      HasRewardCheck<T, double&(T::*)()>::value &&
      HasModelCheck<T, std::vector<LayerTypes>&(T::*)()>::value, void>::type
  LayerReward(T* layer) const;

  template<typename T>
  typename std::enable_if<
      !HasRewardCheck<T, double&(T::*)()>::value &&
      HasModelCheck<T, std::vector<LayerTypes>&(T::*)()>::value, void>::type
  LayerReward(T* layer) const;

  template<typename T>
  typename std::enable_if<
      HasRewardCheck<T, double&(T::*)()>::value &&
      !HasModelCheck<T, std::vector<LayerTypes>&(T::*)()>::value, void>::type
  LayerReward(T* layer) const;

  template<typename T>
  typename std::enable_if<
      !HasRewardCheck<T, double&(T::*)()>::value &&
      !HasModelCheck<T, std::vector<LayerTypes>&(T::*)()>::value, void>::type
  LayerReward(T* layer) const;
};

} // namespace ann
} // namespace mlpack

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

#endif