Program with template in c++

general
,
1

Here is the code…

template<
    typename FitnessFunction,
    typename DimensionSelectionType,
    template<typename> class NumericSplitType,
    template<typename> class CategoricalSplitType,
    typename ElemType
>
template<typename MatType>
double RandomForest<
    FitnessFunction,
    DimensionSelectionType,
    NumericSplitType,
    CategoricalSplitType,
    ElemType
>::Train(const MatType& dataset,
         const data::DatasetInfo& datasetInfo,
         const arma::Row<size_t>& labels,
         const size_t numClasses,
         const size_t numTrees,
         const size_t minimumLeafSize,
         const double minimumGainSplit,
         const size_t maximumDepth,
         DimensionSelectionType dimensionSelector)
{
  // Pass off to Train().
  arma::rowvec weights; // Ignored by Train().
  return Train<false, true>(dataset, datasetInfo, labels, numClasses, weights,
      numTrees, minimumLeafSize, minimumGainSplit, maximumDepth,
      dimensionSelector);
}

Can someone tell me how full template is working?