I have a question for those of you who are familiar with lex and yacc. Obviously, if the literal strings "|", "^", etc. are treated as otherwise uninterpreted tokens, an HL7 v2 message cannot be parsed with any context free grammar, but if after reading the first 5 characters, we make them the tokens FIELD_SEP, COMP_SEP, etc., then token stream can easily be parsed with a CFG. But is it possible to use a tool like lex (of flex) to implement a scanner for HL7 messages? I can't thtink of any way of doing this. I know yacc can be used with hand coded scanners, but scanning the message is already 80% of the work!
===== A practical man is a man who practices the errors of his forefathers. --Benjamin Disraeli ==== Greg Woodhouse [EMAIL PROTECTED] [EMAIL PROTECTED] ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ Hardhats-members mailing list Hardhats-members@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hardhats-members
