Hello! I'm trying to use boost::bind and boost::function to perform a callback mechanism. However, the VC2005 compiler crashes for some reason. Let me show the code right away: #include <boost/bind.hpp> #include <boost/function.hpp> #include <boost/any.hpp> #include <boost/noncopyable.hpp> #include <iostream> #include <tchar.h> struct Fl_Widget; typedef boost::function<void (Fl_Widget&, const boost::any&)> CBF_Callback; struct Fl_Widget { CBF_Callback cbf_callback_; boost::any user_data_; //Three calls to set or probe that functor callback variable. CBF_Callback cbf_callback() const {return cbf_callback_;} void cbf_callback(CBF_Callback c, const boost::any& p) {cbf_callback_=c; user_data_=p;} void cbf_callback(CBF_Callback c) {cbf_callback_=c;} //Calls to do the functor callback void do_cbf_callback() {cbf_callback_(boost::ref(*this),user_data_);} // override user_data_ void do_cbf_callback(const boost::any& user_data) {cbf_callback_(boost::ref(*this),user_data);} }; struct GUI : private boost::noncopyable { static GUI& Instance() { static GUI theGUI; return theGUI; } void print() { std::cout << "Inside GUI" << std::endl; } private: GUI(){} }; struct RailCaterpillarControllerGUI { Fl_Widget widget; RailCaterpillarControllerGUI() { // cbToggleDeadZone should be called by widget's callback CBF_Callback callback(boost::bind(&RailCaterpillarControllerGUI::cbToggleDeadZone, this)); widget.cbf_callback(callback); } void cbToggleDeadZone(Fl_Widget& widget, const boost::any& data) { // assume data is reference to the GUI instance boost::any_cast<boost::reference_wrapper<GUI> >(data).get().print(); } }; int _tmain(int argc, TCHAR** argv) { RailCaterpillarControllerGUI controller; controller.widget.do_cbf_callback(boost::ref(GUI::Instance())); } Compiling gives this: 1>------ Build started: Project: test, Configuration: Debug Win32 ------ 1>Compiling... 1>test.cpp 1>c:\users\daniel.sbg\programming\boost_1_34_1\boost\bind.hpp(1575) : warning C4180: qualifier applied to function type has no meaning; ignored 1> c:\users\daniel.sbg\programming\boost_1_34_1\boost\bind.hpp(1609) : see reference to class template instantiation 'boost::_bi::add_cref<Pm,I>' being compiled 1> with 1> [ 1> Pm=void (__thiscall RailCaterpillarControllerGUI::* )(Fl_Widget &,const boost::any &), 1> I=1 1> ] 1> c:\users\daniel.sbg\programming\test\test.cpp(48) : see reference to class template instantiation 'boost::_bi::dm_result<Pm,A1>' being compiled 1> with 1> [ 1> Pm=void (__thiscall RailCaterpillarControllerGUI::* )(Fl_Widget &,const boost::any &), 1> A1=RailCaterpillarControllerGUI * 1> ] 1>c:\users\daniel.sbg\programming\boost_1_34_1\boost\mem_fn.hpp(318) : warning C4180: qualifier applied to function type has no meaning; ignored 1> c:\users\daniel.sbg\programming\boost_1_34_1\boost\bind\bind_template.hpp(22 5) : see reference to class template instantiation 'boost::_mfi::dm<R,T>' being compiled 1> with 1> [ 1> R=void (Fl_Widget &,const boost::any &), 1> T=RailCaterpillarControllerGUI 1> ] 1>Project : error PRJ0002 : Error result 255 returned from 'C:\Program Files\Microsoft Visual Studio 8\VC\bin\cl.exe'. The compiler seems to crash when trying to compile the RailCaterpillarControllerGUI constructor. Any ideas why? I'm using 8.0.50727.867 (vsvista.050727-8600), boost-1.34.1 Thanks in advance! -- Daniel