Ragel is great for replacing regex validation code ("Does this string look like a IP address, email address, or date?"), or for writing a lexer, but if you nee

Ragel is great for replacing regex validation code ("Does this string look like a IP address, email address, or date?"), or for writing a lexer, but if you need to actually parse something (i.e. extract even a moderate amount of structured data) then you need something else. It has a particularly sublime output mode for generating Graphviz dot files however.