Concepts of Programming Languages (11th Edition)
Concepts of Programming Languages (11th Edition)
11th Edition
ISBN: 9780133943023
Author: Robert W. Sebesta
Publisher: PEARSON
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Chapter 4, Problem 2PS
Program Plan Intro

Pairwise Disjointness Test:

Perform the pairwise disjointness test on the following grammar rules, for each pair of rules find the disjoint such as Aai and Aaj.

If the intersection of First(ai) and First(aj) is equivalent to the , it means pair pass the disjointness test.

Explanation of Solution

b) AB{aB}|a

Consider the above grammar to perform pairwise disjointness.

Find the First set for Right Hand Side of non-terminal symbol A.

FIRST (b{aB}) = {b}

FIRST (a) = {a}

Now, perform the intersection of FIRST (b{aB})FIRST&#

Explanation of Solution

c) BaB|a

Find the First set for Right Hand Side of non-terminal symbol B.

FIRST (aB) = {a}

FIRST (a) = {a}

Now, perform the intersection of FIRST (aB)FIRST </

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