// See www.openfst.org for extensive documentation on this weighted
  // finite-state transducer library.
  
  #ifndef FST_SCRIPT_ARC_CLASS_H_
  #define FST_SCRIPT_ARC_CLASS_H_
  
  #include <fst/script/weight-class.h>
  
  namespace fst {
  namespace script {
  
  // A struct representing an arc while ignoring arc type. It is passed as an
  // argument to AddArc.
  
  struct ArcClass {
    template <class Arc>
    explicit ArcClass(const Arc &arc)
        : ilabel(arc.ilabel), olabel(arc.olabel), weight(arc.weight),
          nextstate(arc.nextstate) {}
  
    ArcClass(int64 ilabel, int64 olabel, const WeightClass &weight,
             int64 nextstate)
        : ilabel(ilabel), olabel(olabel), weight(weight), nextstate(nextstate) {}
  
    template <class Arc>
    Arc GetArc() const {
      return Arc(ilabel, olabel, *(weight.GetWeight<typename Arc::Weight>()),
                 nextstate);
    }
  
    int64 ilabel;
    int64 olabel;
    WeightClass weight;
    int64 nextstate;
  };
  
  }  // namespace script
  }  // namespace fst
  
  #endif  // FST_SCRIPT_ARC_CLASS_H_