[Moose-dev] Re: PetitParser : an OrderedCollcetion transformed to a PPDelegateParser

Hi Abdelghani, PPCompositeParser use reflection to initialize all the parsers stored in instance variables. Your problem comes from the fact that your "model" instance variable is not intended to stores a parser as other instance variables do. To exclude your iv from PPCompositeParser machinery you can redefine #ignoredNames on class-side: PPMyLanguageGenerator class>>ignoredNames ^ super ignoredNames, #(model) But it looks like #model is supposed to be the result of your generator? If this is the case I think that you should not store it in an instance variable. Parsers are supposed to be stateless. Instead each production rule should return a part of your model (using ==> [ … ]) that you then compose progressively in other rules. Terminal rules return the leaves of your model and non-terminal rules compose the results. The start production rule then returns the full model. Look at the other subclasses of PPCompositeParser for insight. HTH, Camille