syntax-0.3.0.0: syntax.cabal
name: syntax
version: 0.3.0.0
synopsis: Syntax descriptions for unified parsing and pretty-printing.
description:
'syntax' allows you to write a single syntax description and instantiate is both as a parser and a pretty printer.
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The interface is based on a custom Functor\/Applicative\/Monad hierarchy, provided by the 'semi-iso' package. You fmap using
a semi-isomorphism instead of function. A semi-isomorphism is a isomorphism that can fail in both directions, with slightly
weakened laws. It is worth to note that @Iso@s and @Prism@s from 'lens' are valid semi-isomorphisms :)
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Once you write a description you can, for example turn it into an Attoparsec parser, or into a 'Data.Syntax.Printer.Text.Printer'.
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See @syntax-example@ and @syntax-example-json@ for examples, @syntax-attoparsec@ and @syntax-printer@ for a parser/printer implementation.
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The library was inspired by:
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* Rendel, Tillmann, and Klaus Ostermann. "Invertible syntax descriptions: unifying parsing and pretty printing." ACM Sigplan Notices. Vol. 45. No. 11. ACM, 2010.
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TODO:
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* Research relative monads and relative monad transformers. Indent is basically a Reader monad over a syntax. How would a State monad look?
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* Try to implement Haskell layout rule.
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* Combinators for binary data formats, vectors.
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* Better error messages.
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* Maybe an implementation of do notation for SemiIsoMonad with QuasiQuoters, like the codo notation for comonads.
license: MIT
license-file: LICENSE
author: Paweł Nowak
maintainer: Paweł Nowak <pawel834@gmail.com>
copyright: Paweł Nowak 2014
category: Data
build-type: Simple
cabal-version: >=1.10
source-repository head
type: git
location: git@github.com:Pawel834/syntax.git
library
exposed-modules: Data.Syntax
Data.Syntax.Char
Data.Syntax.Combinator
Data.Syntax.Indent
build-depends: base >= 4 && < 5, mono-traversable, lens >= 4, semi-iso >= 0.5.0, scientific >= 0.3, text
default-language: Haskell2010