7d5781e5ab
port revision where appropriate - Add devel/hs-ghc-paths - Add devel/hs-QuickCheck - Add devel/hs-readline - Add devel/hs-haskeline - Add devel/hs-mmap - Remove lang/ghc-doc - Mark devel/lhs2TeX broken as it does not compile with GHC 6.10.4 - Set NHC98 as default compiler for devel/hs-hat as it does not compile with GHC 6.10.4 PR: ports/137055, ports/137058, ports/137059, ports/137060, ports/137061, ports/137062, ports/137063, ports/137063, ports/137064, ports/137065, ports/137066, ports/137067, ports/137068, ports/137069, ports/137070, ports/137071, ports/137072, ports/137074, ports/137075, ports/137076, ports/137077, ports/137078, ports/137079, ports/137080, ports/137081, ports/137082, ports/137083, ports/137084, ports/137085, ports/137086, ports/137087, ports/137088, ports/137090, ports/137091, ports/137092, ports/137093, ports/137094, ports/137095, ports/137096, ports/137097, ports/137098, ports/137099, ports/137102, ports/137103, ports/137104, ports/137107, ports/137108, ports/137109, ports/137110, ports/137111 Submitted by: Jacula Modyun (jacula (at) gmail (dot) com), Ashish Shukla (wahjava (at) gmail (dot) com) (amd64 support) Supported by: wxs (review, amd64 testing), tabthorpe (8.x testing) Approved by: tabthorpe (mentor), respective maintainers
18 lines
832 B
Text
18 lines
832 B
Text
Happy is a parser generator system for Haskell, similar to the tool
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`yacc' for C. Like `yacc', it takes a file containing an annotated BNF
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specification of a grammar and produces a Haskell module containing a
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parser for the grammar.
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Happy is flexible: you can have several Happy parsers in the same
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program, and several entry points to a single grammar. Happy can work
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in conjunction with a lexical analyser supplied by the user (either
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hand-written or generated by another program), or it can parse a stream
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of characters directly (but this isn't practical in most cases).
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As of version 1.5, Happy is capable of parsing full Haskell. We have a
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Haskell parser that uses Happy, which will shortly be part of the
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library collection distributed with GHC.
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WWW: http://www.haskell.org/happy/
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-- Simon Marlow <simonmar@microsoft.com>
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