[ragel-users] question about the union operation

[Adrian Thurston]

Hi Manoj,

Within or literals - is used to separate ranges. You'll need to escape
the '-' character with '\'.

-Adrian

Manoj Rajagopalan wrote:
> 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
> 
> > 
>