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Question

Yacc source program has 3 parts. Which of the following are Yacc source program parts?

A
Terminal symbol, non-terminal symbol, production rule
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B
Declaration, translation rules, user routines
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C
Declaration, Translation rules, C programs
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D
None of these
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Solution

The correct option is C Declaration, Translation rules, C programs

YACC:-

Yacc("Yet another compiler compiler") is the standard parser generator for the UNIX operating system. An open source program, yacc generates code for the parser in the C programming language. The acronym is usually rendered in lowercase but is occasionally seen as Yacc.

YACC source program has 3 parts:-

Declaration:-

The declarations section is used to declare and describe constructs that are needed by the parsing mechanism and the actions associated with rules in the rules section.

Translation rules:-

A YACC program is a translation scheme. Thus, a YACC parser evaluates the actions by a depth-first traversal of the parse tree.

C programs:-

Yacc provides a general tool for describing the input to a computer program. The Yacc user specifies the structures of his input, together with code to be invoked as each such structure is recognized.



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