32 struct CustomArc {  struct
33   typedef short Label;
34   typedef ProductWeight<TropicalWeight, LogWeight> Weight;
35   typedef int64 StateId;
37   CustomArc(Label i, Label o, Weight w, StateId s) :  in CustomArc()  function
39   CustomArc() {}  in CustomArc()  argument
41   static const string &Type() {  // Arc type name  in Type()
46   Label ilabel;       // Transition input label
47   Label olabel;       // Transition output label
48   Weight weight;      // Transition weight
49   StateId nextstate;  // Transition destination state