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| -rw-r--r-- | gnu/packages/haskell.scm | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm index 861f59456e..9205e958c0 100644 --- a/gnu/packages/haskell.scm +++ b/gnu/packages/haskell.scm @@ -6751,4 +6751,33 @@ preserved. It also provides features for random access to archive content using an index.") (license license:bsd-3))) +(define-public ghc-transformers + (package + (name "ghc-transformers") + (version "0.5.2.0") + (source + (origin + (method url-fetch) + (uri (string-append + "https://hackage.haskell.org/package/transformers/transformers-" + version ".tar.gz")) + (sha256 + (base32 + "1qkhi8ssf8c4jnmrw9dzym3igqbzq7h48iisaykdfzdsm09qfh3c")))) + (build-system haskell-build-system) + (home-page "http://hackage.haskell.org/package/transformers") + (synopsis "Concrete functor and monad transformers") + (description + "A portable library of functor and monad transformers, inspired by the paper +'Functional Programming with Overloading and Higher-Order Polymorphism', +by Mark P Jones. This package contains the monad transformer class and IO monad class, +concrete functor and monad transformers, each with associated operations and functions +to lift operations associated with other transformers. The package can be used on +its own in portable Haskell code, in which case operations need to be manually lifted +through transformer stacks. Alternatively, it can be used with the +non-portable monad classes in the @code{mtl} or @code{monads-tf} packages, +which automatically lift operations introduced by monad transformers through +other transformers.") + (license license:bsd-3))) + ;;; haskell.scm ends here |