Re: [boost] try... catch... finally?

4 Apr 2007


      Alexander Nasonov <alnsn <at> yandex.ru> writes:
...
I'm very impressed how you wrote it off the top of your head :->
I didn't.  I've been toying with it for a
couple of days.
...
But it's definitely too much magic. Though, it made me think of
another magic: study alloca implementations and replace a global
variable with something like
<snip>
Why do you need this magic?

BOOST_SCOPE_EXIT( (hello)(world) ) // line 1
   /* Expands to:
      struct args_line1_t { std::string &hello, &world; } args_line1 = {
          hello, world
      };
      struct scope_exit_line1 {
          args_line1_t* m_args;
          ~scope_exit() {
              doit(p->hello, p->world);
           }
           static void doit(std::string& hello, std::string& world)
   */
   {
       // scope(exit) code
   }
   BOOST_SCOPE_EXIT_END // line 5
   /*
      } scope_exit_line5 = { &args_line1 };
   */

In Christ,
Steven Watanabe