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Of course, converting a context-free grammar to a regular grammar is not possible in the general case; however, practical languages are highly regular (otherwise regex-based syntax highlighting systems like vim and emacs wouldn"t work at all!) Autohighlight generates vim and emacs syntax highlighting from a BNF grammar and a description of which terms should be highlighted which colors.
This project originated from a student collaboration between Scotty Allen and Scott Williams at the University of Colorado in 2006.