c++ - 使用异步函数提升 asio 编译错误

Question

我想创建一个异步。服务器。我成功地做到了这一点，但现在我想将 async_read/asyn_write 函数绑定(bind)到调用者对象函数。所以我试着用 boost::function 来做到这一点这里有我的代码:

服务器.cpp

#include "Server.h"
#include "Client.h"
#include "Network.h"

void        Server::accept(void)
{
    Network::ptr connection = Network::create(this->my_acceptor.get_io_service());
    this->my_acceptor.async_accept(connection->getSocket(), bind(&Server::endCmd, this, connection, placeholders::error));
}

void        Server::endCmd(Network::ptr connection, const boost::system::error_code& error)
{
    if (!error)
        {
            std::cout << "Recu un client!" << std::endl;
            this->client.push_back(new Client(connection));
            this->client[client.size() - 1]->checkAuthentification();
            std::cout << "Envoie du message de securisation" << std::endl;
            std::cout << "Nouvelle ecoute" << std::endl;
            this->accept();
        }
}

Client.h 和.cpp

#include "Network.h"

class Client
{
private:
    Network::ptr    connection;

public:
    Client(Network::ptr);
    ~Client();
    void            checkAuthentification(void);
    void            endRead(const error_code& error, size_t nbytes);
    void            endWrite(const error_code &error);
};

#include "Client.h"

Client::Client(Network::ptr connect)
{
    this->connection = connect;
    this->connection->assignFunction(this);
}

Client::~Client()
{
    this->connection->close();
}

void            Client::checkAuthentification(void)
{
    this->connection->Swrite("BIENVENUE", this);
}

void            Client::endRead(const error_code& error, size_t nbytes)
{
    if (!error && nbytes != 0)
        {
            std::cout << this->connection->getRcvMsg() << std::endl;
            this->connection->Sread(this);
        }
    else
        this->connection->close();
}

void            Client::endWrite(const error_code &error)
{
    if (!error)
        this->connection->Sread(this);
    else
        this->connection->close();
}

和Network.cpp 和.h

#include "Client.h"

class       Network : public boost::enable_shared_from_this<Network>
{
private:
    tcp::socket             socket;
    std::string             rcv_msg;
    std::string             msg;
    boost::array<char, 6>   rbuffer;
    boost::function<void (Client *, const error_code &, size_t)> fread;
    boost::function<void (Client *, const error_code &)> fwrite;

public:
    typedef boost::shared_ptr<Network> ptr;

    Network(io_service &);
    ~Network();
    void                assignFunction(void);
    void                close(void);
    void                Sread(Client *cli);
    void                Swrite(std::string msg, Client *cli);
    tcp::socket&        getSocket(void);
    std::string         getRcvMsg(void);
    static ptr          create(io_service &);
};

#include "Client.h"
#include "Network.h"

Network::Network(io_service &ios) : socket(ios)
{
}

Network::~Network()
{
    this->close();
}

void            Network::assignFunction(void)
{
    this->fread = &Client::endRead;
    this->fwrite = &Client::endWrite;
}

void            Network::close(void)
{
    if (this->socket.is_open())
    {
        std::cout << "Connection closed" << std::endl;
        this->socket.close();
    }
}

void        Network::Sread(Client *cli)
{
    async_read(this->socket, buffer(this->rbuffer), bind(&Network::fread, cli, placeholders::error, placeholders::bytes_transferred));
}


void            Network::Swrite(std::string msg, Client *cli)
{
    this->msg = msg;
    async_write(this->socket, buffer(this->msg, (int)this->msg.size()), bind(&Network::fwrite, cli, placeholders::error));
}

std::string     Network::getRcvMsg(void)
{
    return (std::string(this->rbuffer.c_array(), this->rbuffer.size()));
}

tcp::socket&    Network::getSocket(void)
{
    return (this->socket);
}

Network::ptr                Network::create(io_service &ios)
{
    return (ptr(new Network(ios)));
}

当我想编译它时，出现以下错误:

Client.h(10): error C2653: 'Network' : is not a class or namespace name
     Client.h(10): error C2146: syntax error : missing ';' before identifier 'connection'
     Client.h(10): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
     Client.h(10): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
     Client.h(13): error C2653: 'Network' : is not a class or namespace name
     Client.h(13): error C2653: 'Network' : is not a class or namespace name
     Client.h(13): error C2460: 'Client::ptr' : uses 'Client', which is being defined
                 Client.h(8) : see declaration of 'Client'
     1>Client.cpp(6): error C2511: 'Client::Client(Network::ptr)' : overloaded member function not found in 'Client'
                 Client.h(8) : see declaration of 'Client'
     1>Client.cpp(13): error C2039: 'connection' : is not a member of 'Client'
                 Client.h(8) : see declaration of 'Client'
     1>Client.cpp(13): error C2227: left of '->close' must point to class/struct/union/generic type
     1>Client.cpp(18): error C2039: 'connection' : is not a member of 'Client'
                 Client.h(8) : see declaration of 'Client'
     1>Client.cpp(18): error C2227: left of '->Swrite' must point to class/struct/union/generic type
     1>Client.cpp(25): error C2039: 'connection' : is not a member of 'Client'
                 Client.h(8) : see declaration of 'Client'
     1>Client.cpp(25): error C2227: left of '->getRcvMsg' must point to class/struct/union/generic type
     1>Client.cpp(26): error C2039: 'connection' : is not a member of 'Client'
                 Client.h(8) : see declaration of 'Client'
     1>Client.cpp(26): error C2227: left of '->Sread' must point to class/struct/union/generic type
     1>Client.cpp(29): error C2039: 'connection' : is not a member of 'Client'
                 Client.h(8) : see declaration of 'Client'
     1>Client.cpp(29): error C2227: left of '->close' must point to class/struct/union/generic type
     1>Client.cpp(35): error C2039: 'connection' : is not a member of 'Client'
                 Client.h(8) : see declaration of 'Client'
     1>Client.cpp(35): error C2227: left of '->Sread' must point to class/struct/union/generic type
     1>Client.cpp(37): error C2039: 'connection' : is not a member of 'Client'
                 Client.h(8) : see declaration of 'Client'
     1>Client.cpp(37): error C2227: left of '->close' must point to class/struct/union/generic type
         Commande.cpp
         main.cpp
     Client.h(10): error C2653: 'Network' : is not a class or namespace name
     Client.h(10): error C2146: syntax error : missing ';' before identifier 'connection'
     Client.h(10): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
     Client.h(10): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
     Client.h(13): error C2653: 'Network' : is not a class or namespace name
     Client.h(13): error C2653: 'Network' : is not a class or namespace name
     Client.h(13): error C2460: 'Client::ptr' : uses 'Client', which is being defined
                 Client.h(8) : see declaration of 'Client'
         My_exception.cpp
         Network.cpp
     Network.h(14): error C2065: 'Client' : undeclared identifier
     Network.h(14): error C2059: syntax error : ','
     Network.h(15): error C2065: 'Client' : undeclared identifier
     Network.h(15): error C2059: syntax error : ','
     Network.h(25): error C2065: 'Client' : undeclared identifier
     Network.h(25): error C2065: 'cli' : undeclared identifier
     Network.h(25): error C2143: syntax error : missing ',' before ')'
     Network.h(29): error C2143: syntax error : missing ';' before '}'
     Client.h(8): error C2143: syntax error : missing ';' before '{'
     Client.h(18): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(6): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(7): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(10): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(12): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(15): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(16): error C2653: 'Client' : is not a class or namespace name
     1>Network.cpp(17): error C2653: 'Client' : is not a class or namespace name
     1>Network.cpp(18): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(21): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(23): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(26): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(27): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(30): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(31): error C2355: 'this' : can only be referenced inside non-static member functions
     1>Network.cpp(31): error C2227: left of '->rbuffer' must point to class/struct/union/generic type
     1>Network.cpp(31): error C2065: 'cli' : undeclared identifier
     1>Network.cpp(31): error C2143: syntax error : missing ',' before ')'
     1>Network.cpp(32): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(35): error C2065: 'Client' : undeclared identifier
     1>Network.cpp(35): error C2065: 'cli' : undeclared identifier
     1>Network.cpp(35): error C2143: syntax error : missing ',' before ')'
     1>Network.cpp(36): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(38): error C2355: 'this' : can only be referenced inside non-static member functions
     1>Network.cpp(38): error C2227: left of '->msg' must point to class/struct/union/generic type
     1>Network.cpp(38): error C2355: 'this' : can only be referenced inside non-static member functions
     1>Network.cpp(38): error C2227: left of '->msg' must point to class/struct/union/generic type
     1>Network.cpp(38): error C2228: left of '.size' must have class/struct/union
     1>Network.cpp(38): error C2065: 'cli' : undeclared identifier
     1>Network.cpp(38): error C2143: syntax error : missing ',' before ')'
     1>Network.cpp(39): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(42): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(43): error C2355: 'this' : can only be referenced inside non-static member functions
     1>Network.cpp(43): error C2227: left of '->rbuffer' must point to class/struct/union/generic type
     1>Network.cpp(43): error C2228: left of '.size' must have class/struct/union
     1>Network.cpp(43): error C2143: syntax error : missing ',' before ')'
     1>Network.cpp(44): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(47): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(49): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(52): error C2143: syntax error : missing ';' before '{'
     1>Network.cpp(54): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(55): error C2143: syntax error : missing ';' before '}'
     1>Network.cpp(55): fatal error C1004: unexpected end-of-file found
         Server.cpp
     Client.h(10): error C2653: 'Network' : is not a class or namespace name
     Client.h(10): error C2146: syntax error : missing ';' before identifier 'connection'
     Client.h(10): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
     Client.h(10): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
     Client.h(13): error C2653: 'Network' : is not a class or namespace name
     Client.h(13): error C2653: 'Network' : is not a class or namespace name
     Client.h(13): error C2460: 'Client::ptr' : uses 'Client', which is being defined
                 Client.h(8) : see declaration of 'Client'
     1>Server.cpp(22): error C2664: 'Client::Client(const Client &)' : cannot convert parameter 1 from 'Network::ptr' to 'const Client &'
                 Reason: cannot convert from 'Network::ptr' to 'const Client'
                 No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called

经过这么多小时的“谷歌搜索”和反射(reflection)，我没有找到为什么会出现这些错误。任何人都可以帮助我吗？

Answer 1

嗯..也许你遗漏了它们但是你没有包含标题:

编辑 这似乎是显而易见的。如果不是那样的话
编辑 2 请注意，这些建议是在未提供有关包含结构的完整信息时输入的。问题现在已经解决，但是当编译器没有“看到”您的声明时出现奇怪的问题时，这些提示是很好的一般故障排除建议:

• 检查预编译头设置(例如禁用它们)

• 检查您的 header 包含守卫(如果它们不正确，例如

  #ifndef __NETWORK_H
  #define __NETWORK_H
  
  ...
  #endif // __NETWORK_H
  

  在您的 Client.h 中...

• 检查命名空间问题

  • 不小心在命名空间中声明了网络
  • 在 namespace { ... } block 中包含 Network.h

• 检查预处理器问题(#define造成严重破坏？)

服务器.cpp

include "Network.h"
include "Server.h"

//....

客户端.cpp

include "Network.h"
include "Server.h"

网络.cpp

include "Network.h"

可能(查看错误的形式):

客户端.h

include "Network.h"

也是