[Boost-users] correct usage of bind (pls ignore last email)

Hi, The code below tries to chain function ft1 (argument is a pair) with function buildPair (returns a pair). template std::pair buildPair(X x, Y y) { std::pair apair(x,y); return apair; } int main() { typedef boost::function)> FuncType1_t; std::vector > myvec; FuncType1_t ft1 = bind(&std::vector > ::push_back, &myvec, _1); typedef boost::function)> FuncType2_t; FuncType2_t ft2 = bind(ft1, bind(buildPair,_1,_2)); //compile fails return 0; } This fails. The problem however vanished if I replace the declaration "FuncType3 ft2..." with bind(ft1, bind(buildPair,_1,_2))(3,5); So my question is what is correct type of bind(ft1, bind(buildPair,_1,_2)); Thanks sandeep