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initializationinstance-variablespharopetitparser

Custom instance variables and initializing with PetitParser

As far as I know PetitParser initializes each instance variable with a production method of the same name. What should one do, to add a custom instance variable and initialize it in the initialize method for example?

Solution

  • You can override the class-side method #ignoredNames in subclasses to add your own instance-variables that PetitParser does not touch:

    PPCompositeParser class>>#ignoredNames
    "Answer a collection of instance-variables that should 
     not be automatically initialized with productions, but
     that are used internal to the composite parser."

     ^ PPCompositeParser allInstVarNames