February 2022
Beginner to intermediate
572 pages
13h
English
Content preview from An Introduction to Formal Languages and Automata, 7th Edition
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17.1 CONTEXT-FREE GRAMMAR CONVERSION TO NPDA
Section 7.2 showed one way to convert a context-free grammar to an npda, in which the grammar was restricted to Greibach normal form. Then Section 16.1 showed another way to convert a context-free grammar to an npda, modeling how LL parsing works. We now see a third way to convert a context-free grammar to an npda, modeling how LR parsing works. In both LL parsing and LR parsing, the context-free grammar is not restricted to any form.
We start with a context-free grammar and design the npda to model how the LR parsing process works. The process starts with an empty stack, shifting symbols from the input string onto the stack until the right-hand side of a production is recognized. The process then ...
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