OpInfo(const OpDef& graph_op_def, const ApiDef& api_def,
         const std::vector<string>& aliases);
  OpInfo(const OpDef& graph_op_def, const ApiDef& api_def);
  string GetOpAttrStruct() const;
  string GetConstructorDecl(StringPiece op_name_prefix,
                            bool include_attr) const;

  string op_name;
  std::vector<string> arg_types;
  std::vector<string> arg_names;
  std::vector<string> output_types;