boost::function and template member functions

From: Markus Werle (yg-boost-users_at_[hidden])
Date: 2002-12-05 04:21:50

Hi!

With the help of ConcreteEvoker I was
able to get an (indirect) address for
Test::Apply<double>.

This address is obtained via automatic
template instantiation, so I feel like
there must be a way to achiev the same thing
without ConcreteEvoker.

Any comments?

#include <iostream>

#include "boost/function.hpp"
#include "boost/bind.hpp"

struct Test
{
  template <class T> static T Apply(T t1, T t2)
  {
    return t1 + t2;
  }
};

template <class T, class OP> struct ConcreteEvoker
{
  static T Apply(T d1, T d2)
  {
    return OP::Apply(d1, d2);
  }
};

int main()
{
  boost::function<double (double, double)> test =
    &ConcreteEvoker<double, Test>::Apply;
  std::cerr << test(1.0, 2.0) << std::endl;
}