Happy is a Haskell-based parser generator that uses an annotated BNF specification of a grammar to create a Haskell module with a grammar parser, similar to C's `yacc' tool.
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Our system has scanned the download for viruses, and we suggest that you also check the files before installation. The version of Happy you are about to download is 1.18.4, and the download will be provided as is, with no modifications or changes made on our end.