Funny enough, I just started using this the other day to write a little async callback JS pre-processor. I wanted to just tokenize but then I found out that JS'

Funny enough, I just started using this the other day to write a little async callback JS pre-processor. I wanted to just tokenize but then I found out that JS's regexp literals make JS ambiguous to parse. This project turned out to be a huge boon--really easy to patch to find particular token boundaries.