Concepts of Programming Languages (11th Edition)
11th Edition
ISBN: 9780133943023
Author: Robert W. Sebesta
Publisher: PEARSON
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Expert Solution & Answer
Chapter 3, Problem 15PS
Explanation of Solution
Consider the following BNF:
<program> -> begin <stmt_list> end
<stmt_list> -> <stmt>
| <stmt> ; <stmt_list>
<stmt> -> <var> = <expression>
<var>- A | B | C
<expression> - <var> + <var>
|<var> - <var>
|<var>
Conversion of the given BNF into the EBNF is as follow:
Enclosing an entity in curly braces indicates that it can be used indefinitely or left altogether as stated in section 3.3.2 of the book.
- So <stmt_list> can be defined as <stmt> or {<stmt>} use indefinitely after a <stmt>.
- Therefore, write the first two productions as:
<program> -> begin <stmt_list> end
<stmt_list> -> <stmt>{<stmt>}
- The next two productions are same as given since no EBNF rule applies to them...
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Chapter 3 Solutions
Concepts of Programming Languages (11th Edition)
Ch. 3 - Prob. 1RQCh. 3 - Prob. 2RQCh. 3 - Prob. 3RQCh. 3 - Prob. 4RQCh. 3 - Prob. 5RQCh. 3 - Prob. 6RQCh. 3 - Prob. 7RQCh. 3 - Prob. 8RQCh. 3 - Prob. 9RQCh. 3 - What is the difference between a synthesized and...
Ch. 3 - Prob. 11RQCh. 3 - Prob. 12RQCh. 3 - Prob. 13RQCh. 3 - Prob. 14RQCh. 3 - Prob. 15RQCh. 3 - Prob. 16RQCh. 3 - Prob. 17RQCh. 3 - Prob. 18RQCh. 3 - Prob. 19RQCh. 3 - Prob. 20RQCh. 3 - Prob. 21RQCh. 3 - What does partial correctness mean for a loop...Ch. 3 - Prob. 23RQCh. 3 - Prob. 24RQCh. 3 - Prob. 25RQCh. 3 - Prob. 26RQCh. 3 - Prob. 27RQCh. 3 - Prob. 28RQCh. 3 - Prob. 29RQCh. 3 - The two mathematical models for language...Ch. 3 - Write EBNF descriptions for the following: a. A...Ch. 3 - Prob. 3PSCh. 3 - Prob. 4PSCh. 3 - Prob. 5PSCh. 3 - Prob. 6PSCh. 3 - Prob. 9PSCh. 3 - Prob. 10PSCh. 3 - Prob. 12PSCh. 3 - Prob. 15PSCh. 3 - Prob. 16PSCh. 3 - Prob. 17PSCh. 3 - Prob. 18PSCh. 3 - Compute the weakest precondition for each of the...
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