Question: -> -> -> -> 0 -> 1 -> Extend the above BNF to an attribute grammar to accept only even parity messages, e.g., 101 but

-> -> -> -> 0 -> 1 ->

Extend the above BNF to an attribute grammar to accept only even parity messages, e.g., 101 but not 010. An even parity message is a bit sequence that has an even number of 1's.

  • Draw parse trees for some sentences, say 010 and 101.
  • Decide a rule, or rules, to place predicates.
  • Formulate the predicates by introducing attributes (synthesized vs. inherited).

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