From: Michael Granger <ged@...>
Date: 2010-11-30T10:25:21+09:00
Subject: Re: class-wide begin/end blocks/exception handling

On 11/29/10 4:06 PM, David E. wrote:
 > [...]
 > ... Is there a way to put one begin/end block encompassing the whole
 > class/object? Sort of like an instance-wide begin/end block?

There isn't any syntax that lets you rescue any exception for the whole 
class, but you can add a rescue clause to an entire method, saving you a 
'begin' and an 'end'. E.g., instead of:

   def one(stext)
     begin
       puts("Hi");
     rescue Exception =>  msg
       self.exceptionHandle(msg)
     end
   end

you'd have:

   def one(stext)
     puts("Hi");
   rescue Exception => msg
     self.exceptionHandle(msg)
   end

This is (IMO) far more readable than the alternative.

You could probably add exception-handling for any method on a whole 
class using clever aliasing and the 'method_added' hook or a 
declarative, but down that path lies madness in the face of ScriptErrors 
or any exception you haven't anticipated.

-- 
Michael Granger <ged@FaerieMUD.org>
Rubymage, Architect, Believer
The FaerieMUD Consortium <http://FaerieMUD.org/>