Using boost::bind with boost::function: retrieve binded variable type

Question

Is there any way to retrieve information on what paramaters were bounded by boost::bind or does this need to be stored manually?

i.e.:

in .h

Answer 1

boost::function has some public typedefs which you should be able to use.

template  // Function type R (T1, T2, ..., TN)
class function : public functionN {
public:
  // types
  typedef R  result_type;         
  typedef T1 argument_type;         // If N == 1
  typedef T1 first_argument_type;   // If N == 2
  typedef T2 second_argument_type;  // If N == 2
  typedef T1 arg1_type;           
  typedef T2 arg2_type;  

  // ...

  // static constants
  static const int arity = N;

Adapted slightly from the boost::function reference.