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尝试为boost :::: asio :: deadline_timer设置成员函数时出现Boost :: bind编译错误

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我在尝试创建boost :: asio :: deadline_timer时遇到的编译错误有点问题 . 我在MSVC10上使用以下代码示例获得了以下错误 . 它是用Boost 1.48构建的

第一个错误看起来像是抱怨将成员函数设置为async_wait作为引用的处理程序 . 但是，当我更改参数时，它会给出类似的错误 .

我做错了 . 我的代码类似于this示例，我使用bind和deadline_timer的方式 .

抱歉编译错误看起来有多乱 . 我还在努力搞定Markdown .

代码示例

包括

#include <boost/thread.hpp>
#include <boost/bind.hpp>
#include <boost/asio.hpp>
#include <boost/system/error_code.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>

class TimerThing
{
protected:
    boost::asio::deadline_timer* statusTimer_;
    boost::thread_group worker_threads_;

    boost::asio::io_service io_service_;
    boost::shared_ptr<boost::asio::io_service::work> work_;

public:
    TimerThing() {}

    virtual ~TimerThing(){}

    void updateStatus(boost::system::error_code& ec)
    {
        if (ec == boost::asio::error::operation_aborted)
            return;

        std::cout<<"Status Update"<<std::endl;

        statusTimer_->expires_at(statusTimer_->expires_at() + boost::posix_time::seconds(1));
        statusTimer_->async_wait(boost::bind(&TimerThing::updateStatus, this, , boost::asio::placeholders::error));
    }

    void start()
    {
        statusTimer_=new boost::asio::deadline_timer(io_service_);
        boost::shared_ptr<boost::asio::io_service::work> myWork(new boost::asio::io_service::work(io_service_));
        work_=myWork;

        worker_threads_.create_thread( boost::bind( &TimerThing::threadAction, this ) );

        statusTimer_->expires_at(statusTimer_->expires_at() + boost::posix_time::seconds(1));
        statusTimer_->async_wait(boost::bind(&TimerThing::updateStatus, this, boost::asio::placeholders::error));
    }

    void threadAction()
    {
        io_service_.run();
    }

    void stop()
    {
        work_.reset();
        io_service_.stop();
        worker_threads_.join_all();

        delete statusTimer_;
    }

};



#include "TimerThing.h"

int main(int argc, const char* argv[] )
{
    TimerThing t;

    std::string input;
    std::cout<<"Press f to stop"<<std::endl;

    t.start();

    std::cin>>input;

    t.stop();

    return 0;
}

编译错误

c：\ Underware \ version \ include \ boost / bind / bind.hpp（313）：错误C2664：'R boost :: _ mfi :: mf1 :: operator（）（const U＆，A1）const'：无法转换参数2从'const boost :: system :: error_code'到'boost :: system :: error_code＆'

与
[
R =无效，
T = TimerThing，
A1 = boost :: system :: error_code＆，
U = TimerThing *
]
转换失去限定符
c：\ Underware \ version \ include \ boost / bind / bind_template.hpp（47）：参见函数模板实例化'void boost :: _ bi :: list2 <A1，A2> :: operator（）<F，boost： ：_bi :: list1 <const boost :: system :: error_code＆>>（boost :: _ bi :: type <T>，F＆，A＆，int）'正在编译
同
[
A1 = boost :: _ bi :: value <TimerThing *>，
A2 =升压:: ARG <1>，
F = boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，
T =无效，
A = boost :: _ bi :: list1 <const boost :: system :: error_code＆>
]
c：\ Underware \ version \ include \ boost / asio / detail / bind_handler.hpp（46）：参见函数模板实例化'void boost :: _ bi :: bind_t <R，F，L> :: operator（）< const Arg1>（const A1＆）'正在编译中
同
[
R =无效，
F = boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，
L = boost :: _ bi :: list2 <boost :: _ bi :: value <TimerThing *>，boost :: arg <1 >>，
Arg1 = const boost :: system :: error_code，
A1 = const boost :: system :: error_code
]

c：\ Underware \ version \ include \ boost / asio / detail / bind_handler.hpp（45）：同时编译类模板成员函数'void boost :: asio :: detail :: binder1 <Handler，Arg1> :: operator（） （无效）”
同
[
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>，
ARG1 =的boost ::系统:: ERROR_CODE
]
c：\ Underware \ version \ include \ boost / asio / detail / wait_handler.hpp（59）：参见类模板实例化'boost :: asio :: detail :: binder1 <Handler，Arg1>'正在编译
同
[
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>，
ARG1 =的boost ::系统:: ERROR_CODE
]

c：\ Underware \ version \ include \ boost / asio / detail / wait_handler.hpp（45）：同时编译类模板成员函数'void boost :: asio :: detail :: wait_handler <Handler> :: do_complete（boost :: asio :: detail :: io_service_impl *，boost :: asio :: detail :: operation *，const boost :: system :: error_code＆，size_t）'
同
[
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>
]
c：\ Underware \ version \ include \ boost / asio / detail / deadline_timer_service.hpp（185）：参见类模板实例化'boost :: asio :: detail :: wait_handler <Handler>'的编译
同
[
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>
]
c：\ Underware \ version \ include \ boost / asio / deadline_timer_service.hpp（137）：参见函数模板实例化'void boost :: asio :: detail :: deadline_timer_service <Time_Traits> :: async_wait <WaitHandler>（提升： ：asio :: detail :: deadline_timer_service <Time_Traits> :: implementation_type＆，Handler）'正在编译
同
[
Time_Traits =升压:: ASIO :: time_traits <提高::了posix_time ::的ptime>
WaitHandler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>，
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>
]
c：\ Underware \ version \ include \ boost / asio / basic_deadline_timer.hpp（502）：参见函数模板实例化的参考'voidboost :: asio :: deadline_timer_service <TimeType，TimeTraits> :: async_wait <WaitHandler>（boost :: asio :: detail :: deadline_timer_service <Time_Traits> :: implementation_type＆，const WaitHandler＆）'正在编译中
同
[
TimeType =提振::了posix_time ::的ptime，
TimeTraits =升压:: ASIO :: time_traits <提高::了posix_time ::的ptime>
WaitHandler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>，
Time_Traits =升压:: ASIO :: time_traits <提高::了posix_time ::的ptime>
]

c：\ users \ tharper \ documents \ visual studio 2010 \ projects \ asiotimer \ asiotimer \ TimerThing.h（48）：参见函数模板实例化'void boost :: asio :: basic_deadline_timer :: async_wait>（const WaitHandler＆） '正在编译

与
[
时间=提振::了posix_time ::的ptime，
R =无效，
F = boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，
L = boost :: _ bi :: list2 <boost :: _ bi :: value <TimerThing *>，boost :: arg <1 >>，
WaitHandler = boost :: _ bi :: bind_t，boost :: _ bi :: list2，boost :: arg <1 >>>] TimerThing.cpp

c：\ Underware \ version \ include \ boost / bind / bind.hpp（313）：错误C2664：'R boost :: _ mfi :: mf1 :: operator（）（const U＆，A1）const'：无法转换参数2从'const boost :: system :: error_code'到'boost :: system :: error_code＆'

与
[
R =无效，
T = TimerThing，
A1 = boost :: system :: error_code＆，
U = TimerThing *
]
转换失去限定符

c：\ Underware \ version \ include \ boost / bind / bind_template.hpp（47）：参见函数模板实例化'void boost :: _ bi :: list2 :: operator（）>（boost :: _ bi :: type， F＆，A＆，int）'正在编译中

与
[
A1 = boost :: _ bi :: value <TimerThing *>，
A2 =升压:: ARG <1>，
F = boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，
T =无效，
A = boost :: _ bi :: list1 <const boost :: system :: error_code＆>
]
c：\ Underware \ version \ include \ boost / asio / detail / bind_handler.hpp（46）：参见函数模板实例化'void boost :: _ bi :: bind_t <R，F，L> :: operator（）< const Arg1>（const A1＆）'正在编译中
同
[
R =无效，
F = boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，
L = boost :: _ bi :: list2 <boost :: _ bi :: value <TimerThing *>，boost :: arg <>>，
Arg1 = const boost :: system :: error_code，
A1 = const boost :: system :: error_code
]
c：\ Underware \ version \ include \ boost / asio / detail / bind_handler.hpp（45）：同时编译类模板成员函数'void boost :: asio :: detail :: binder1 <Handler，Arg1> :: operator（） （无效）”
同
[
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>，
ARG1 =的boost ::系统:: ERROR_CODE
]
c：\ Underware \ version \ include \ boost / asio / detail / wait_handler.hpp（59）：参见类模板实例化'boost :: asio :: detail :: binder1 <Handler，Arg1>'正在编译
同
[
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>，
ARG1 =的boost ::系统:: ERROR_CODE
]
c：\ Underware \ version \ include \ boost / asio / detail / wait_handler.hpp（45）：同时编译类模板成员函数'void boost :: asio :: detail :: wait_handler <Handler> :: do_complete（boost :: asio :: detail :: io_service_impl *，boost :: asio :: detail :: operation *，const boost :: system :: error_code＆，size_t）'
同
[
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>
]
c：\ Underware \ version \ include \ boost / asio / detail / deadline_timer_service.hpp（185）：参见类模板实例化'boost :: asio :: detail :: wait_handler <Handler>'的编译
同
[
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>
]
c：\ Underware \ version \ include \ boost / asio / deadline_timer_service.hpp（137）：参见函数模板实例化'void boost :: asio :: detail :: deadline_timer_service <Time_Traits> :: async_wait <WaitHandler>（提升： ：asio :: detail :: deadline_timer_service <Time_Traits> :: implementation_type＆，Handler）'正在编译
同
[
Time_Traits =升压:: ASIO :: time_traits <提高::了posix_time ::的ptime>
WaitHandler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing >，boost :: arg <1 >>>，
Handler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing>，升压:: ARG <1 >>>
]
c：\ Underware \ version \ include \ boost / asio / basic_deadline_timer.hpp（502）：参见函数模板实例化'void boost :: asio :: deadline_timer_service <TimeType，TimeTraits> :: async_wait <WaitHandler>（boost :: asio :: detail :: deadline_timer_service <Time_Traits> :: implementation_type＆，const WaitHandler＆）'正在编译
同
[
TimeType =提振::了posix_time ::的ptime，
TimeTraits =升压:: ASIO :: time_traits <提高::了posix_time ::的ptime>
WaitHandler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>，
Time_Traits =升压:: ASIO :: time_traits <提高::了posix_time ::的ptime>
]
c：\ users \ tharper \ documents \ visual studio 2010 \ projects \ asiotimer \ asiotimer \ TimerThing.h（48）：参见函数模板实例化'void boost :: asio :: basic_deadline_timer <Time> :: async_wait <boost： ：_bi :: bind_t <R，F，L >>（const WaitHandler＆）'正在编译
同
[
时间=提振::了posix_time ::的ptime，
R =无效，
F = boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，
L = boost :: _ bi :: list2 <boost :: _ bi :: value <TimerThing *>，boost :: arg <1 >>，
WaitHandler = boost :: _ bi :: bind_t <void，boost :: _ mfi :: mf1 <void，TimerThing，boost :: system :: error_code＆>，boost :: _ bi :: list2 <boost :: _ bi :: value < TimerThing *>，boost :: arg <1 >>>
]

boost boost-asio boost-bind

2 回答

  • 2

    void updateStatus(boost::system::error_code& ec) 应为 void updateStatus(const boost::system::error_code& ec) .

    你在 boost::bind(&TimerThing::updateStatus, this, , boost::asio::placeholders::error)); 有额外的逗号

    回复于
  • 2

    您在 start 中的绑定是正确的， updateStatus 中的绑定不是：

    void updateStatus(const boost::system::error_code& ec)
{
    if (ec == boost::asio::error::operation_aborted)
        return;

    std::cout<<"Status Update"<<std::endl;

    statusTimer_->expires_at(
      statusTimer_->expires_at() + boost::posix_time::seconds(1));
    statusTimer_->async_wait(
      boost::bind(&TimerThing::updateStatus, this, 
                  boost::asio::placeholders::error));
}

    您还需要使用占位符 .

    一般提示：更喜欢发布可编译的示例而不是完整的编译器barf . 在您的情况下删除不可移植的VC cruft（ tmain ， stdafx ）并添加所有包含 .

    回复于

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