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Happy

1.19.5 Freeware    
  UNRATED

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Happy is a parser generator system for Haskell, similar to the tool `yacc' for C. Like `yacc', it takes a file containing an annotated BNF specification of a grammar and produces a Haskell module containing a parser for the grammar.

Happy is flexible: you can have several entry points to a single grammar and several Happy parsers in the same program.

Happy can work in conjunction with a lexical analyser supplied by the user (either hand-written or generated by another program), or it can parse a stream of characters directly (but this isn't practical in most cases).

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Last updated on January 10th, 2015
Happy - The Terminal window presenting the usage of the application

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Free and open source parser generator for Haskell

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