Pearson eText for Concepts of Programming Languages -- Instant Access (Pearson+)
Pearson eText for Concepts of Programming Languages -- Instant Access (Pearson+)
12th Edition
ISBN: 9780135102268
Author: Robert Sebesta
Publisher: PEARSON+
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Chapter 4, Problem 14RQ

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Recursive-descent parsing subprogram is written for a rule with a single RHS:

A recursive descent parser contains a set of recursive subprograms which produces a parse tree. Syntax of nested structures in a language (certain control structures, parenthesis) are described with the help of recursive grammar rules.

  • Each subprogram is written for each corresponding to a non- terminal in the grammar.
  • The subprogram corresponding to a particular non terminal scans the input string and builds a parse tree with root as that non terminal and leaves matching the input string.
  • Each subprogram should act as a parser for the set of strings which are generated by its corresponding non terminal...

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