Hello,   I am trying to use Boost::Bind  to bind my function but I am getting an error as Bind cannot diffrentiate between the constructors even though they have diffrent function signatures.     TestBind(boost::bind((&Test::process), &t1, _1));   I would highly appreciate any help.   Thanks         //Boost Includes #include <boost/function.hpp> #include <boost/bind.hpp> #include <boost/enable_shared_from_this.hpp> namespace test{ struct A{ public:  int one;  int two;   }; struct B{ public:  short three;  short four; };   typedef boost::shared_ptr<A>          t_boostInt;   typedef boost::shared_ptr<B>          t_boostShort; class TestBind{ public:   typedef boost::function<    int (t_boostInt)>                         t_ProcessFunctionInt; public:   ///< call back process function for short   typedef boost::function<   short (t_boostShort)>                         t_ProcessFunctionShort; public:   TestBind( t_ProcessFunctionInt func){} TestBind(t_ProcessFunctionShort func){} }; class Test { public: Test(){} ~Test(); public:  int process(t_boostInt msg) {  return 1;} }; int main(int argc, char * argv[]) {   try {    Test t1;    TestBind(boost::bind((&Test::process), &t1, _1));   }   catch (std::exception & exception) {     std::cout << exception.what() << std::endl;   }   return 0; } }