The hardest part about parsing Perl is that you have to track both entries in the symbol table and token types in the input stream in order to decide when / is division vs. a regular expression and when ? is the trinary operator vs. a regular expression.

I seriously doubt that Switch.pm will ever solve this problem completely for Perl5 simply because the effort involved is more than a sane person would do.

Anyway, I wanted to strongly discourage the use of such complicated magic for any serious (a.k.a. production) scripts. You could easily find no problem with it at first and then make a minor change and find yourself either making "voodoo" changes (like remove '?'s from comments) in order to make Switch.pm happy or having to do a major rewrite to remove your dependence on that module.

        - tye (but my friends call me "Tye")