Question

我对c ++很陌生，并尝试编写简单的boost :: asio服务器包装类，并且遇到一些麻烦。按照这个例子http://thisthread.blogspot.ru/2011/02/minimal-asio-tcp-server.html，并尝试将asio对象放在我的类的对象中：

tcpserver.h:

class tcpserver {
public:
    tcpserver(unsigned short port  = 9999);
    ~tcpserver();

private:
    boost::asio::io_service io_service;
    boost::asio::ip::tcp::endpoint endpoint;
    boost::asio::ip::tcp::acceptor acceptor;
    boost::asio::ip::tcp::socket socket;
};

tcpserver.cpp:

#include "tcpserver.h"

tcpserver::tcpserver(unsigned short port){
    endpoint = boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v6(), port);
    acceptor = boost::asio::ip::tcp::acceptor(io_service, endpoint);
}

编译器抛出以下错误： /Users/rusik/huyorg/lib/tcpserver/tcpserver.cpp:3:12: error: constructor for 'tcpserver' must explicitly initialize the member 'acceptor' which does not have a default constructor tcpserver::tcpserver(unsigned short port){

我该如何正确地做到这一点？谢谢！

Answer 1

在初始化中使用它：

tcpserver::tcpserver(unsigned short port) :
    endpoint(boost::asio::ip::tcp::v6(), port),
    acceptor(io_service, endpoint)
}

因为当你按自己的方式行事时，成员是临时默认构建的（接受者缺少这些成员）。在这里，他们直接用正确的参数构建

c ++如何在没有默认构造函数的情况下定义另一种类型的对象成员

1 个答案: