Hello, 

I am trying to use a class member function in conjunction with boost's function input iterator, and am having trouble coming up with a solution which can in any way be considered elegant... 

My initial thought process was to do something like :

  std::copy(

    // does not work because the functor (1st arg to make_function_input iterator ) cannot be temporary... or something like that

    boost::make_function_input_iterator(boost::bind(&My_Class::my_function, 0)),

    boost::make_function_input_iterator(boost::bind(&My_Class::my_function, 10)),

    std::ostream_iterator<result_type>(std::cout, " ")

  );

However, this fails as noted above.

Thus, i had to look at some compiler error messages in order to figure out the return type of boost::bind and create some boost::bind object producing the working code below, however, this looks pretty terrible.

Can anyone suggest a more convenient solution to the problem I am trying to solve?

Thanks,

Michael King

#include<iostream>

#include<iterator>

#include<boost/bind.hpp>

#include<boost/iterator/function_input_iterator.hpp>

class foo {

  public:

    typedef double result_type; 

    result_type return_random() const { return drand48(); }

};

int main() {

  foo bar; 

  // found type from compiler error message...

  boost::_bi::bind_t<

      double, 

      boost::_mfi::cmf0<

            double, 

            foo>, 

      boost::_bi::list1<

            boost::_bi::value<foo> 

      > 

  > f = boost::bind(&foo::return_random, bar); 

  std::copy(

    boost::make_function_input_iterator(f, 1),

    boost::make_function_input_iterator(f, 10),

    std::ostream_iterator<double>(std::cout, "\n")

  );

  return 0; 

}