question about the union operation

[Manoj Rajagopalan]

hi ragel users,

   I find ragel having trouble with expressions like the following:

   (alnum | [_-])+

I get errors like:
mmp-parser.rl:33:30: at token RE_SqClose: parse error

   Is the above expression incorrect for matching a string that can 
contain alphanumeric characters or '_' or '-'

thanks
Manoj