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

From: Alexander Nasonov (alnsn_at_[hidden])
Date: 2007-04-03 18:52:54

Andrey Semashev wrote:
> What if something like that:
> 
> BOOST_SCOPE_EXIT // line 1
> /*
>   Expands to:
>   struct _scope_guard_class_line1
>   {
>      ~_scope_guard_class_line1()
>      {
> */
>      {
>          // scope(exit) code
>      }
> BOOST_SCOPE_EXIT_END((hello)(world)); // line 5
> /*
>   Expands to:
>      }
> 
>      std::string& hello;
>      std::string& world;
>   } _scope_guard_line5 = { hello, world };
> */
> 
> 
> While the variable list is now in the end, no ids needed at all.

I considered it too but I thought it could scare people.

So, we have

1. 
    BOOST_SCOPE_EXIT
    {
        // ... 
    } BOOST_SCOPE_EXIT_END( (hello)(world) )

2.
    BOOST_SCOPE_EXIT(id, (hello)(world) )
    {
        // ...
    } BOOST_SCOPE_EXIT_END(id)

3. with global variable
    BOOST_SCOPE_EXIT( (hello)(world) )
    {
        // ...
    } BOOST_SCOPE_EXIT_END

I even considered something like this in the past:

{ BOOST_SCOPE_EXIT( (hello)(world) {
    // code
}} id;

It may seem strange but not to people familiar with ruby blocks:

{ |hello,world|
  // code
}

-- 
Alexander Nasonov
http://nasonov.blogspot.com
Don`t knock masturbation; it`s sex with someone I love. -- Woody
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