multiply_constant_impl.hpp

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#ifndef MLPACK_METHODS_ANN_LAYER_MULTIPLY_CONSTANT_IMPL_HPP
#define MLPACK_METHODS_ANN_LAYER_MULTIPLY_CONSTANT_IMPL_HPP

// In case it hasn't yet been included.
#include "multiply_constant.hpp"

namespace mlpack {
namespace ann  {

template<typename InputDataType, typename OutputDataType>
MultiplyConstant<InputDataType, OutputDataType>::MultiplyConstant(
    const double scalar) : scalar(scalar)
{
  // Nothing to do here.
}

template<typename InputDataType, typename OutputDataType>
MultiplyConstant<InputDataType, OutputDataType>::MultiplyConstant(
    const MultiplyConstant& layer) :
    scalar(layer.scalar)
{
  // Nothing to do here.
}

template<typename InputDataType, typename OutputDataType>
MultiplyConstant<InputDataType, OutputDataType>::MultiplyConstant(
    MultiplyConstant&& layer) :
    scalar(std::move(layer.scalar))
{
  // Nothing to do here.
}

template<typename InputDataType, typename OutputDataType>
MultiplyConstant<InputDataType, OutputDataType>&
MultiplyConstant<InputDataType, OutputDataType>::operator=(
    const MultiplyConstant& layer)
{
  if (this != &layer)
  {
    scalar = layer.scalar;
  }
  return *this;
}

template<typename InputDataType, typename OutputDataType>
MultiplyConstant<InputDataType, OutputDataType>&
MultiplyConstant<InputDataType, OutputDataType>::operator=(
    MultiplyConstant&& layer)
{
  if (this != &layer)
  {
    scalar = std::move(layer.scalar);
  }
  return *this;
}

template<typename InputDataType, typename OutputDataType>
template<typename InputType, typename OutputType>
void MultiplyConstant<InputDataType, OutputDataType>::Forward(
    const InputType& input, OutputType& output)
{
  output = input * scalar;
}

template<typename InputDataType, typename OutputDataType>
template<typename DataType>
void MultiplyConstant<InputDataType, OutputDataType>::Backward(
    const DataType& /* input */, const DataType& gy, DataType& g)
{
  g = gy * scalar;
}

template<typename InputDataType, typename OutputDataType>
template<typename Archive>
void MultiplyConstant<InputDataType, OutputDataType>::serialize(
    Archive& ar, const uint32_t /* version */)
{
  ar(CEREAL_NVP(scalar));
}

} // namespace ann
} // namespace mlpack

#endif