From: jim@...
Date: 2004-10-26T05:56:39+09:00
Subject: Question on defining hier error types: Is this OK?

Hi

I was defining a hierachical error type today and realized
that I had inheritied from a class before it was closed.

It seems to work nicely, but was just wondering why.

Below is an example:

  module A
  
    class MyClassError < StandardError
      class NoBlockError < MyClassError; end
      class IOError      < MyClassError; end
      ...
    end#class MyClassError
    
    
    class MyClass
      ...
      raise MyClassError::NoBlockError
      ...
      raise MyClassError::IOError
      ...
    end#class MyClass
    
  end#module A
  
I like the way this turned out. Does anyone see a problem with doing this?

-- 
Jim Freeze