That's quite normal since signal::connect is not a const function. One solution is to make the signal object mutable.
-----Message d'origine----- De : Roel Vanhout [mailto:[EMAIL PROTECTED] Envoyé : mercredi 24 août 2005 12:37 À : libsigc-list@gnome.org Objet : [sigc] function of const object as slot Hi, The program below doesn't compile (at least on MSVC, the error is: Compiling... constsigslot2.cpp c:\Users\roel\ThirdParty\sigc++\object_slot.h(84) : error C2440: 'initializing' : cannot convert from 'const Foo' to 'Foo &' Conversion loses qualifiers c:\test\constsigslot2\constsigslot2.cpp(25) : see reference to function template instantiation 'SigC::Slot0<R> SigC::slot<std::string,const Foo,Foo>(O1 &,R (__thiscall Foo::* )(void) const)' being compiled with [ R=std::string, O1=const Foo ] ) How can I connect to a slot of a const object? I've tried putting 'const' just about everywhere I could imagine but no change apart from other error messages :) It compiles ok when I don't make the object 'f' const. Is it possible at all? Thanks. cheers, roel #include <string> #include <sigc++/sigc++.h> class Foo : public SigC::Object { public: std::string Bar() const { return "Bleh"; } }; int main(int argc, char* argv[]) { const Foo f; SigC::Signal0<std::string> signal; signal.connect(SigC::slot<std::string>(f, &Foo::Bar)); std::cout << signal() << std::endl; return 0; } _______________________________________________ libsigc-list mailing list libsigc-list@gnome.org http://mail.gnome.org/mailman/listinfo/libsigc-list
