[Boost-users] [boost::signal][boost::bind] signal::disconnect problem with MSVC 2005

21 Sep 2006

      Hi,

    See this code ...

#include<iostream>
#include<boost/bind.hpp>
#include<boost/signal.hpp>

struct CSignal
{
        typedef boost::signal< void (void) >    UpdateSignal;

        UpdateSignal        sig;
};

struct CSlot
{:
    void    update(int i)
    {
        std::cout << "Call void    update( " << i << " )" << std::endl;
    }

    void    connect(CSignal& cs)
    {
        cs.sig.connect(boost::bind(&CSlot::update, this, 5));
    }
    void    disconnect(CSignal& cs)
    {
        cs.sig.disconnect(boost::bind(&CSlot::update, this, 5));
    }
};

int main()
{
    CSignal csignal;
    CSlot   cslot;

    cslot.connect(csignal);    csignal.sig();
    cslot.disconnect(csignal);    csignal.sig();

    return (0);
}

  When i compile with GCC 4.1.1, this compile fine.
  But when i compile with MSVC 2005 it report an error:

.\main.cpp(30) : error C2664:
'boost::signal1<R,T1,Combiner,Group,GroupCompare,SlotFunction>::disconnect'
: cannot convert parameter 1 from 'boost::_bi::bind_t<R,F,L>' to 'const int
&'
        with
        [
            R=void,
            T1=int,
            Combiner=boost::last_value<void>,
            Group=int,
            GroupCompare=std::less<int>,
            SlotFunction=boost::function<void (int)>
        ]
        and
        [
            R=void,
            F=boost::_mfi::mf1<void,CSlot,int>,
            L=boost::_bi::list2<boost::_bi::value<CSlot *>,boost::arg<1>>
        ]
        Reason: cannot convert from 'boost::_bi::bind_t<R,F,L>' to 'const
int'
        with
        [
            R=void,
            F=boost::_mfi::mf1<void,CSlot,int>,
            L=boost::_bi::list2<boost::_bi::value<CSlot *>,boost::arg<1>>
        ]
        No user-defined-conversion operator available that can perform this
conversion, or the operator cannot be called

have you any idee to solve this problem?

thank

david callu