constant.hpp

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#ifndef MLPACK_METHODS_ANN_LAYER_CONSTANT_HPP
#define MLPACK_METHODS_ANN_LAYER_CONSTANT_HPP

#include <mlpack/prereqs.hpp>

namespace mlpack {
namespace ann  {

template <
    typename InputDataType = arma::mat,
    typename OutputDataType = arma::mat
>
class Constant
{
 public:
  Constant(const size_t outSize = 0, const double scalar = 0.0);

  template<typename InputType, typename OutputType>
  void Forward(const InputType& input, OutputType& output);

  template<typename DataType>
  void Backward(const DataType& /* input */,
                const DataType& /* gy */,
                DataType& g);

  OutputDataType& OutputParameter() const { return outputParameter; }
  OutputDataType& OutputParameter() { return outputParameter; }

  OutputDataType& Delta() const { return delta; }
  OutputDataType& Delta() { return delta; }

  size_t OutSize() const { return outSize; }

  size_t WeightSize() const
  {
    return 0;
  }

  template<typename Archive>
  void serialize(Archive& ar, const uint32_t /* version */);

 private:
  size_t inSize;

  size_t outSize;

  OutputDataType constantOutput;

  OutputDataType delta;

  OutputDataType outputParameter;
}; // class ConstantLayer

} // namespace ann
} // namespace mlpack

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

#endif