[Boost-users] comparing function objects

"Function object wrappers can be compared via == or != against any function object that can be stored within the wrapper. If the function object wrapper contains a function object of that type, it will be compared against the given function object (which must be either be EqualityComparable or have an overloaded boost::function_equal)." But how do I compare two boost::functions? This code doesn't work: #include #include double f(double) { return 42.0; } int main() { boost::function f1 = boost::bind(&f, _1); boost::function f2 = boost::bind(&f, _1); //if (f1 == f2) if (boost::function_equal, boost::function >(f1,f2)) ; } NOTE: tried to specifically instantiate the function_equal template as attempt3. Previous attempt didn't do that...it also did not work.