62   struct Tuple {  struct
63     Tuple() {}  in Tuple()  function
64     Tuple(Label ilabel_, Label olabel_, Weight weight_)  in Tuple()  argument
66     Tuple(const Tuple& tuple)  in Tuple()  argument
77     bool operator()(const Tuple* x, const Tuple* y) const {  in operator()
97     size_t operator()(const Tuple* x) const {  in operator()
112   typedef unordered_map<const Tuple*,
132     const Tuple tuple(arc.ilabel,  in Encode()
137       encode_tuples_.push_back(new Tuple(tuple));  in Encode()
147     const Tuple tuple(arc.ilabel,  in GetLabel()
159   const Tuple* Decode(Label key) const {  in Decode()
208   vector<Tuple*> encode_tuples_;
224     const Tuple* tuple = encode_tuples_[i];  in Write()
264     Tuple* tuple = new Tuple();  in Read()
448       const typename EncodeTable<A>::Tuple* tuple = table_->Decode(arc.ilabel);  in operator()