C++ Boost bind value type -

i in documentation , source code cannot figure out how return value type of boost bind functor. trying accomplish following:

 35 template<typename t,size_t n, class f>  36 boost::array<typename f::value_type, n> make_array(t (&input)[n], f unary) {  37     boost::array<typename f::value_type, n> array;  38     std::transform(input, input + n, array.begin(), unary);  39     return array;  40 } 

where f can bind functor. above not work because functor not have value_type. matter, there standard interface unary/binary functor far return value.

solution: should result_type. equivalent defined argument_type , first/second_argument_type binary functions

thanks

doh. nevermind, it's result_type rather value_type. should delete question?