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Re: Python or Perl for a Debian maintainance project?

On Thu, Feb 19, 2004 at 01:21:23PM -0500, Joey Hess wrote:

> Matt Zimmerman wrote:
> > The principal difference being that $@ is a string, while the exception
> > raised in Matthias' is a real exception.  This means that various error
> > conditions can be handled programmatically, rather than aborting with an
> > error message.
> $@ can be an exception object if you want it to be.

I found exactly zero occurrences of this practice in the standard Perl
library and all modules I have installed on my system, and perlvar(1) says
it is a string, so I imagine this techinque is not very popular.  Have you
ever used it?  Standardized error handling is a lot less interesting if the
"standard" is limited to code that you write yourself.

> perldoc -f die

<shields eyes>

               If LIST is empty and $@ already contains a value (typically
               from a previous eval) that value is reused after appending
               "\t...propagated".  This is useful for propagating exceptions:

                   eval { ... };
                   die unless $@ =~ /Expected exception/;

 - mdz

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