KFlex lexer generator

[kjkrum]

In a nutshell: I've written an extension to JFlex called KFlex that I think might be of general interest, so far as anything to do with lexers is of general interest. I've described the benefits of KFlex in an announcement on the project forums.

I created KFlex to assist in writing a lexer for TradeWars 2002, so the project might also be of interest to anyone who plays that game.

[kjkrum]

Revision 7 allows rules to push, pop, and set the lexical state. This makes parsing things like nested comments extremely simple.