Re: [boost] Request for review: scope_exit

From: Philippe Vaucher (philippe.vaucher_at_[hidden])
Date: 2006-11-27 11:56:26

FWIW, another interface could be a class like :

// untested
class scope_guard
{
   public:

     typedef boost::function<void()> func_type;

     explicit scope_guard()
     {
     }

     explicit scope_guard(const func_type& f)
     {
         add_function(f);
     }

     ~scope_guard()
     {
         for(int i = 0; i < m_functions.size(); ++i)
           m_functions[i]();
     }

     void add_function(const func_type& f)
     {
         m_functions.push_back(f);
     }

     // Could be used to cancel something
     void clear()
     {
        m_functions.clear();
     }

   private:

     std::vector<func_type> m_functions;

};

This, used along with boost::bind would make your example become smth like :

glob_t result_glob;
scope_guard guard(boost::bind(&globfree, &result_glob));
/* throw or return here */

And you could add more than one function call to do with the add_function()
member... of course it's more limited than what your interface offers, but I
think the idea is worth mentionning.

Credits goes to Eelis (irc) for the idea.

Philippe