In the GIT repository for PLY, I refactored a bit of the error handling code to simplify a few things, but I think I could be convinced to expand it a bit more. Let me think about how I would handle it. Perhaps p_error() handling could be expanded to support an optional second argument in which the parser instance would be passed. Certainly open to design ideas on this. Cheers,Dave
----- Original Message ----- From: [email protected] To: Cc: Sent:Sun, 28 Oct 2012 19:15:14 -0700 (PDT) Subject:p_error parameters lack information One can define a p_error function to handle syntax errors, but unfortunately, Ply provides no useful information to the function. I've had to resort to an ugly reflection hack just to provide meaningful error messages. Would it be possible to improve the interface so that Ply actually provides access to this information? def p_error(p): if p is None: print "Syntax error: unexpected EOF" else: print "Syntax error at line {}: unexpected token {}".format(p.lineno [1], p.value) [2] #Ugly hack since Ply doesn't provide any useful error information import inspect frame = inspect.currentframe() [3] cvars = frame.f_back.f_locals print 'Expected:', ', '.join(cvars['actions'][cvars['state']].keys()) print 'Found:', cvars['ltype'] print 'Current stack:', cvars['symstack'] -- You received this message because you are subscribed to the Google Groups "ply-hack" group. To post to this group, send email to [email protected] [4]. To unsubscribe from this group, send email to [email protected] [5]. To view this discussion on the web visit https://groups.google.com/d/msg/ply-hack/-/lohTjGaPdqgJ [6]. For more options, visit https://groups.google.com/groups/opt_out [7]. Links: ------ [1] http://p.lineno [2] http://sitemail.hostway.com/http: [3] http://sitemail.hostway.com/http: [4] mailto:[email protected] [5] mailto:[email protected] [6] https://groups.google.com/d/msg/ply-hack/-/lohTjGaPdqgJ [7] https://groups.google.com/groups/opt_out -- You received this message because you are subscribed to the Google Groups "ply-hack" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
