Exam 3: Compiler Construction and Parsing Algorithms

Consider the following grammar: S ? FR R ? S | ? F ? id In the predictive parser table, M, of the grammar the entries M[S, id] and M[R, $]respectively.

Consider the following expression grammar. The seman-tic rules for expressioncalculation are stated next to each grammar production. E ? number E.val = number. val | E '+' E E(1).val = E(2).val + E(3).val | E '×' E E(1).val = E(2).val × E(3).val The above grammar and the semantic rules are fed to a yacc tool (which is an LALR (1)parser generator) for parsing and evaluating arithmetic expressions. Which one of thefollowing is true about the action of yacc for the given grammar?

Debugger is a program that

A canonical set of items is given below S --> L. > R Q --> R. On input symbol < the set has