From: Joel VanderWerf <vjoel@...>
Date: 2003-11-29T13:16:46+09:00
Subject: Re: How to access Bar in Foo when Foo::Bar exists?

Wejn wrote:
> Hi,
>   I can't figure out how to:
> 
> class Foo
>   class Bar << RuntimeError; end
> 
>   def something
>     begin
>       # ...
>     rescue Bar # i want Bar, not Foo::Bar
>       raise Bar # i want Foo::Bar, correct.
>     end
>   end
> end
> 
> Does anyone have idea how to do that?
> (IIRC, In c++ this is done via "::" operator)

(trying to avoid puns about raising the bar...)

Ruby also has a :: operator:

begin
   class Bar < SyntaxError; end
   class Foo
     class Bar < RuntimeError; end

     def something
       begin
         yield
       rescue ::Bar # i want Bar, not Foo::Bar
         raise Bar # i want Foo::Bar, correct.
       end
     end
   end
   Foo.new.something do raise Bar; end
rescue Exception => e
   p e.class    # => Foo::Bar
end