[ProtoBuf]ProtoBuf命令生成的Cpp文件分析

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生成文件

在[ProtocolBuffer]定义ProtocolBuffer消息中的Person.proto文件用命令protoc.exe --cpp_out=./ Person.proto

生成的Person.pb.h和Person.pb.cc;Person.pb.h其关键部分代码如下：

namespace tutorial {// Internal implementation detail -- do not call these.void protobuf_AddDesc_Person_2eproto();void protobuf_AssignDesc_Person_2eproto();void protobuf_ShutdownFile_Person_2eproto();class Person;class Person_PhoneNumber;class AddressBook;enum Person_PhoneType {  Person_PhoneType_MOBILE = 0,  Person_PhoneType_HOME = 1,  Person_PhoneType_WORK = 2};...class Person_PhoneNumber : public ::google::protobuf::Message { public:  Person_PhoneNumber();  virtual ~Person_PhoneNumber();...  Person_PhoneNumber(const Person_PhoneNumber& from);  inline Person_PhoneNumber& operator=(const Person_PhoneNumber& from) {    CopyFrom(from);    return *this;  }  void Swap(Person_PhoneNumber* other);...  // implements Message ----------------------------------------------  Person_PhoneNumber* New() const;  void CopyFrom(const ::google::protobuf::Message& from);  void MergeFrom(const ::google::protobuf::Message& from);  void CopyFrom(const Person_PhoneNumber& from);  void MergeFrom(const Person_PhoneNumber& from);  void Clear();  bool IsInitialized() const;  int GetCachedSize() const { return _cached_size_; }  public:...  // nested types ----------------------------------------------------  // accessors -------------------------------------------------------  // required string number = 1;  inline bool has_number() const;  inline void clear_number();  static const int kNumberFieldNumber = 1;  inline const ::std::string& number() const;  inline void set_number(const ::std::string& value);  inline void set_number(const char* value);  inline void set_number(const char* value, size_t size);  inline ::std::string* mutable_number();  inline ::std::string* release_number();  inline void set_allocated_number(::std::string* number);  // optional .tutorial.Person.PhoneType type = 2 [default = HOME];  inline bool has_type() const;  inline void clear_type();  static const int kTypeFieldNumber = 2;  inline ::tutorial::Person_PhoneType type() const;  inline void set_type(::tutorial::Person_PhoneType value);  // @@protoc_insertion_point(class_scope:tutorial.Person.PhoneNumber) private:  inline void set_has_number();  inline void clear_has_number();  inline void set_has_type();  inline void clear_has_type();  ::std::string* number_;  int type_;...  static Person_PhoneNumber* default_instance_;};

如何使用

使用形式1

int main(void)  {   Person msg1;   msg1.set_id(101);   msg1.set_name("hello");   cout<<msg1.id()<<endl;  cout<<msg1.name()<<endl;  system("pause");  return 0;  } /*输出 101 hello */

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