Re: [Boost-users] warnings with boost::bind

Subject: Re: [Boost-users] warnings with boost::bind
From: Hansi (hansipet_at_[hidden])
Date: 2009-03-31 03:58:21

Another thing that I have seen now. The compiler crashes when I want to 
assign it to:

boost::function<bool (const A&)> func=boost::bind<bool>(&A::SetData,&a);

What is wrong?

Hansi schrieb:
> Hello,
> 
> I have a question. I use boost::bind with the following class:
> 
> class B
> {
>     int data;
> }
> 
> class A
> {
>     bool SetData(const B&){return true;};
> }
> 
> now when I make somewhere the following:
> 
> 
> A a;
> boost::bind<bool>(&A::SetData,&a);
> 
> I get a warning
> 
> 8>D:\boost\boost_1_34_1\boost/bind.hpp(1575) : warning C4180: qualifier 
> applied to function type has no meaning; ignored
> 8>        D:\boost\boost_1_34_1\boost/bind.hpp(1609) : see reference to 
> class template instantiation 'boost::_bi::add_cref<Pm,I>' being compiled
> 8>        with
> 8>        [
> 8>            Pm=bool (__thiscall Microtec::Program::* )(const 
> Microtec::TrackingInfo &),
> 8>            I=1
> 8>        ]
> 8>        .\Program.cpp(2385) : see reference to class template 
> instantiation 'boost::_bi::dm_result<Pm,A1>' being compiled
> 8>        with
> 8>        [
> 8>            Pm=bool (__thiscall Microtec::Program::* )(const 
> Microtec::TrackingInfo &),
> 8>            A1=bool
> 8>        ]
> 
> I think it is for the const reference. Is this a problem? Is there some 
> way to avoid it (okay the way with pragma I know)?
> 
> I use boost 1.34.1 and MSVC2005
> 
> Regards