lpg lex and parser generator
2016-08-23
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lpg lex and parser generatorLPG (a.k.a. JikesPG) is a LR parsergenerator that you can use to build automatically lexers and parsers forLALR(k) languages. Lexing and parsingactions may be written in almost any programming language including Java, C andC++ , although here we only consider actions and parsers written in Java. The LPG system is much like LEX and YACC inits use of LR parsing, but it is also like ANTLR in its overall structure andits approach to lexical analysis. Wehope that LPG will be a highly usable and efficient replacement for ANTLR, CUPand similar systems. Constructing a parser is generally quite a complicatedprocess in which many detailed issues must be addressed. Of course, a parser generator, such as LPG,is intended to simplify and partially automate the task, but the workings anduse of generator itself are difficult to explain and understand. In this document we explain the use of LPG using an example lexer and parser for a littleexpre
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lpglexandparsergenerator
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