From: Patrick Doyle <wpdster@...>
Date: 2008-10-10T22:50:23+09:00
Subject: rescue clause

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I have been looking at the source code for rake (as you can probably tell
from my previous questions), in an attempt to study a reasonable sized Ruby
application and see what I can learn from the exercise.  I've come across
something that looks like it could be an innocuous typo in the code, or it
could be doing something that I just don't understand.  Here is the code
snippet:

    def standard_exception_handling
      begin
        yield
      rescue SystemExit => ex
        # Exit silently with current status
        exit(ex.status)
      rescue SystemExit, OptionParser::InvalidOption => ex
        # Exit silently
        exit(1)
      end
    end

I am curious as to why SystemExit shows up in 2 different rescue clauses.
Is that a typo?  Or is something else going on?

--wpd

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