I have just bumped into a situation where the valuator always produces a rule step that has arguments beginning from -1 for a particular rule. The rule is a sequence of 5 symbols, and is also the start rule. The first two are the same terminal symbol. marpa_v_arg_0 gives -1. marpa_v_arg_n gives 3. When this rule step is reached, there are only 4 items on the stack, corresponding to the last 4 symbols in the rule. According to the libmarpa documentation, marpa_v_arg_0 never fails, and returns a valid stack position. -1 is not a valid stack position, so what's gone wrong? This problem only occurs when the first two symbols are a particular symbol. Is there something I must have done wrong with this symbol?
Other than this problem, I must say that libmarpa is a quite brilliant library for parsing. -- You received this message because you are subscribed to the Google Groups "marpa parser" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
