The Gateway to Computer Science Excellence
+1 vote
708 views
I am confused in following kinds of Grammar they are;-

1) S - > AB

    A -> Ba

    B -> Bb

    B - > c

2) S - > AB

    A -> Ba

    B -> Bb

    B - > Epsilon

3) S - > AB

    A -> Ba

    B -> Bb

    B - > dollar

what will be the I0 state of these three grammars.

In 1st what will be the look ahead of B -> Bb and B - > c are we need to consider a or a/b.

In 2n what will be the look ahead of B -> Bb and B - > c are we need to consider a or a/epsilon.

In 3rd what will be the look ahead of B -> Bb and B - > c can we consider $ as look ahead symbol.
in Compiler Design by Boss (18.2k points) | 708 views

2 Answers

0 votes

The last Case is not required for understanding and you should not write $ in the production. It represents the start of the stack.

 

For Concept:

@Shubhanshu In short, look-ahead of a non-terminal is the same for its every production.

Watch this video: Timestamp 5:38

https://www.youtube.com/watch?v=1XD2wk52-Cs&list=PLEbnTDJUr_IcPtUXFy2b1sGRPsLFMghhS&index=16

by Junior (551 points)
–1 vote
Looks like your basics are not clear. I recommend to watch this series.

Compiler Design: https://www.youtube.com/playlist?list=PLEbnTDJUr_IcPtUXFy2b1sGRPsLFMghhS
by (265 points)
Quick search syntax
tags tag:apple
author user:martin
title title:apple
content content:apple
exclude -tag:apple
force match +apple
views views:100
score score:10
answers answers:2
is accepted isaccepted:true
is closed isclosed:true
50,647 questions
56,493 answers
195,481 comments
100,789 users