Is anyone aware of any modules that will check subroutine arguments? I can think of two similar features of Perl, but neither is quite right:
1. Prototypes (perlsyn) - put something like ($$@) after your subroutine declaration - but doesn't work for object methods and a few other cases. Plus, doesn't give you the ability to name the arguments and doesn't support argument-based overloading. 2. Getopt::Long - check for argument value types, illegal arguments, etc. - but doesn't allow for "mandatory options" (sounds like an oxymoron, but very common when passing arguments in a hash form to a subroutine) or validating nested data structures. I'm often having to add a half dozen lines of code to every subroutine to perform argument validation and I'd like to offload it once and for all into a CPAN module. Has anyone written or seen such a beast? I haven't, so I've started writing it... but then, what to call it? My working title is ArgsChecker.pm but it should be put into a hierarchy - Data:: perhaps? -- Check out my LEGO blog at http://www.brickpile.com/ View my photos at http://flickr.com/photos/billward/ Follow me at http://twitter.com/williamward
