Non-terminal a is useless if there is no derivation from, Ask an Expert

Non-terminal A is useless if there is no derivation from start symbol to string of tokens in which A appears.

(a) Write a mathematical formulation of this property.

(b) Is it probable that programming language grammar will have useless symbol? Descirbe.

(c) Illustrate that, if grammar has a useless symbol, computation of First and Fellow sets may produce sets that are too large to correctly construct the LL(1) parsing table.

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Automata & Computation, Computer Science

Category:- Automata & Computation
Reference No.:- M9353053

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