G'day Guy,

Switch uses source-filters in order to make your code do its job. Most of the time it gets it right, but sometimes it will twist the code that reaches the Perl in unexpected ways, and that can make debugging very challenging. If you're getting very strange errors due to using Switch, there's a good chance that the source-filter may have adjusted your code incorrectly.

The good news is that Perl 5.10 (not yet released) has a Switch-style construct that's built into the language. It's called given, and looks very similar to its Perl 6 counterpart. You can find more information in one of the recent development deltas.