// See www.openfst.org for extensive documentation on this weighted
  // finite-state transducer library.
  
  #ifndef FST_SCRIPT_REWEIGHT_H_
  #define FST_SCRIPT_REWEIGHT_H_
  
  #include <tuple>
  #include <vector>
  
  #include <fst/reweight.h>
  #include <fst/script/fst-class.h>
  #include <fst/script/script-impl.h>
  #include <fst/script/weight-class.h>
  
  namespace fst {
  namespace script {
  
  using ReweightArgs = std::tuple<MutableFstClass *,
                                  const std::vector<WeightClass> &, ReweightType>;
  
  template <class Arc>
  void Reweight(ReweightArgs *args) {
    using Weight = typename Arc::Weight;
    MutableFst<Arc> *fst = std::get<0>(*args)->GetMutableFst<Arc>();
    const std::vector<WeightClass> &potentials = std::get<1>(*args);
    std::vector<Weight> typed_potentials;
    internal::CopyWeights(potentials, &typed_potentials);
    Reweight(fst, typed_potentials, std::get<2>(*args));
  }
  
  void Reweight(MutableFstClass *fst, const std::vector<WeightClass> &potentials,
                ReweightType reweight_type);
  
  }  // namespace script
  }  // namespace fst
  
  #endif  // FST_SCRIPT_REWEIGHT_H_