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 12RQ

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Parsing algorithms work only on a subset of grammars for the following reasons:

  • Parsing based on a grammar (even unambiguous) is often complicated and inefficient.
  • The complexity of parsing algorithms is generally Ο(n3), which means the time will be of order of cube of the length of parsing string.
  • Parsing algorithms are required to be repeated if parser makes some mistakes in the process. Also algorithms are required to be backed up as some times the parse tree created should be dismantled and rebuilt in some cases

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