[ragel-users] Parsing indented structures (again)

Adrian Thurston thurs... at cs.queensu.ca
Tue Oct 2 15:36:37 UTC 2007


Hi Jonathan,

The problem is that leaving actions embedded in the final state of a
scanner pattern action are not executed. In this case it is %term from
double that is not executed.

To solve this lift the term action up into the scanner pattern action.

-Adrian

Jonathan Stott wrote:
> Hi again
> 
> I /almost/ have a working parser for my files now, but it isn't quite
> working yet and I'm not entirely sure why it is happening.
> 
> The problem is that my terminal actions aren't being called, so the
> strings I use atoi and atof on lack trailing zeros (and thus have a
> random length), so parameters later down the file turn out wrong.
> Very wrong if I start parsing file names, I imagine.
> 
> I've attached the code I'm working on to test the parser with, since
> it's quite complicated to explain.  I apologise for how messy it is,
> but the code has been editted quite a lot as I try to make it work...
> 
> The file I'm using to test looks like:
> 
> # File for testing
> x: 100
> currents:
>   ina: 2 # comment here
>   ito: 3
> y: 11
> 
> and the output says that
> x = 100
> ina = 200
> ito = 300
> y = 110
> 
> Regards,
> Jonathan.
> 
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