I use an editor called Codewright to do my Perl programming in. It has a symbol ouliner that creates a list of all your subrotuines/functions for easy navigation. These are defined for languages like C and Basic, using it's own form of regexps. For Pascal procedures it's:
^[ \t]*procedure[ \t]+[a-zA-Z0-9_]+((\.[a-zA-Z0-9_]+\c[^a-zA-Z0-9_])|(\c[^\.a-zA-Z0-9_])).*[\n]
What would be needed to outline perl functions?