Difference between revisions of "Yacc"

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== Examples ==
 
== Examples ==
* [http://eplmediawiki.di.uminho.pt/uploads/Lavanda_LexYacc.w Lavanda.w] <br>
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* [http://eplmediawiki.di.uminho.pt/uploads/Lavanda_LexYacc.w Lavanda.w]  
 
* [http://eplmediawiki.di.uminho.pt/uploads/Lavanda_LexYacc.pdf Lavanda.pdf]
 
* [http://eplmediawiki.di.uminho.pt/uploads/Lavanda_LexYacc.pdf Lavanda.pdf]
  
 
[[Category:Compiler Generators]]
 
[[Category:Compiler Generators]]

Latest revision as of 00:18, 11 December 2012

Yacc: Yet Another Compiler-Compiler

Computer program input generally has some structure; in fact, every computer program that does input can be thought of as defining an "input language" which it accepts.

An input language may be as complex as a programming language, or as simple as a sequence of numbers. Unfortunately, usual input facilities are limited, difficult to use, and often are lax about checking their inputs for validity.

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. Yacc turns such a specification into a subroutine that handles the input process; frequently, it is convenient and appropriate to have most of the flow of control in the user's application handled by this subroutine.

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