[ragel-users] Newbie advice

[Adrian Thurston]

Hi Dave,

Yes you have the idea, just remove '--\n' from the possible matches of a
line.

%%{
    machine sections;
    action onSection {}

    any_line = [^\n]* '\n';
    marker_line = '--\n';

    section = (any_line - marker_line)* marker_line @onSection;

    main = section*;
}%%

Cheers,
 Adrian

ddri... at gmail.com wrote:
> Hello,
> 
> I'm trying to use Ragel to split apart a structured text file.  As a
> simplified example, I want to split apart sections of a file separated
> by "--" on its own line, e.g.:
> 
> foo--
> bar
> --
> bing
> --
> --
> baz
> --
> 
> This sample has four sections (the third one is empty).  I've got a
> simple machine like this that seems to work:
> 
>     section = (any* $onChar '\n')? :>> "--\n" @onSection;
>     main := section*;
> 
> The idea is that I buffer up section data in the onChar action, and
> then I can process it in onSection.  While this machine does seem to
> work, onChar is being called for the trailing "--".  I understand why
> this is being done, but I'm looking for advice to work around it.
> Should I just delete the trailing "--" in onSection?  Or is there a
> better way?
> 
> Thanks,
> 
> -Dave
> 
> 
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