Apache Thrift C++ typedef 问题

Posted 2023-02-16

【中文标题】Apache Thrift C++ typedef 问题

【英文标题】：Apache Thrift C++ typedef issue

【发布时间】：2014-11-30 18:57:57

【问题描述】：

我正在尝试创建一个将两个数字相乘的简单 thrift 服务器。

我已经这样写了 thrift 文件：

namespace cpp tutorial

typedef i32 int

service MultiplicationService


    int multiply(1:int n1, 2:int n2),

在那之后我跑了thrift --gen cpp multi.thrift

我将骨架文件重命名为MultiplicationServer.cpp，如下所示：

#include "MultiplicationService.h"
#include <thrift/protocol/TBinaryProtocol.h>
#include <thrift/server/TSimpleServer.h>
#include <thrift/transport/TServerSocket.h>
#include <thrift/transport/TBufferTransports.h>

using namespace ::apache::thrift;
using namespace ::apache::thrift::protocol;
using namespace ::apache::thrift::transport;
using namespace ::apache::thrift::server;

using boost::shared_ptr;

using namespace  ::tutorial;

class MultiplicationServiceHandler : virtual public MultiplicationServiceIf 
 public:
  MultiplicationServiceHandler() 
    // Your initialization goes here
  

  int multiply(const int n1, const int n2) 
    return n1 * n2;
  

;

int main(int argc, char **argv) 
  int port = 9090;
  shared_ptr<MultiplicationServiceHandler> handler(new MultiplicationServiceHandler());
  shared_ptr<TProcessor> processor(new MultiplicationServiceProcessor(handler));
  shared_ptr<TServerTransport> serverTransport(new TServerSocket(port));
  shared_ptr<TTransportFactory> transportFactory(new TBufferedTransportFactory());
  shared_ptr<TProtocolFactory> protocolFactory(new TBinaryProtocolFactory());

  TSimpleServer server(processor, serverTransport, transportFactory, protocolFactory);
  server.serve();
  return 0;

但是当我尝试构建它时，我在 multi_types.h 文件中收到此错误：multiple types in one declaration 在 typedef int32_t int 行上 multi_types.h 文件如下所示：

/**
 * Autogenerated by Thrift Compiler (0.9.2)
 *
 * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
 *  @generated
 */
#ifndef multi_TYPES_H
#define multi_TYPES_H

#include <iosfwd>

#include <thrift/Thrift.h>
#include <thrift/TApplicationException.h>
#include <thrift/protocol/TProtocol.h>
#include <thrift/transport/TTransport.h>

#include <thrift/cxxfunctional.h>


namespace tutorial 

typedef int32_t int;

 // namespace

#endif

我尝试删除该行，但随后出现很多 undefined reference to 错误。

我做错了什么？

【问题讨论】：

哪一行有问题？类型定义？

是 typedef 行。

【参考方案1】：

您尝试将 Thrift i32 类型定义为 int，这实际上会产生名称冲突。

所以解决办法是不这样做：

namespace cpp another_tutorial

// typedef i32 int - don't try this at home

service MultiplicationService

    i32 multiply( 1 : i32 n1, 2 : i32 n2)