On Sun, 07 Oct 2007 10:41:52 +0200, Marco Costalba <mcostalba@gmail.com> wrote:
I would think to fix completely the problem reported by Joel we could write instead:
boost::is_convertible<F, boost::function<T> >
But for unknown reasons this fails! All types of function pointers match!
Could someone please be so kind to enlight me?
Thanks Marco
Because boost::function has a constructor whose behavior is like this: template< typename Functor > function (Functor const& f) it skips only integral type through enable_if. So, except integral, everything is convertible to boost::function even apples. In order to implement signature deduction I exploits a support utility used in the implementation of boost::function and a lot of metaprogramming. Give a glance to detail::function::get_function_tag in function_base.hpp, in order to learn how to discern between different kind of functors. Regard, Marco Cecchetti -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/