From 2ffb8346f135c791c0932e84dcc87a61b3d5481a Mon Sep 17 00:00:00 2001 From: John Soo Date: Fri, 13 Dec 2019 09:32:28 -0800 Subject: [PATCH 07/22] gnu: Add ghc-mtl-compat. * gnu/packages/haskell-xyz.scm (ghc-mtl-compat): New variable. --- gnu/packages/haskell-xyz.scm | 39 ++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm index 64a27e8484..f1c8ae1e89 100644 --- a/gnu/packages/haskell-xyz.scm +++ b/gnu/packages/haskell-xyz.scm @@ -7505,6 +7505,45 @@ semi-direct products, \"deletable\" monoids, \"split\" monoids, and \"cut\" monoids.") (license license:bsd-3))) +(define-public ghc-mtl-compat + (package + (name "ghc-mtl-compat") + (version "0.2.2") + (source + (origin + (method url-fetch) + (uri (string-append + "mirror://hackage/package/mtl-compat/mtl-compat-" + version + ".tar.gz")) + (sha256 + (base32 + "17iszr5yb4f17g8mq6i74hsamii8z6m2qfsmgzs78mhiwa7kjm8r")))) + (build-system haskell-build-system) + (arguments + `(#:tests? #f + #:haddock? #f)) + (home-page + "https://github.com/haskell-compat/mtl-compat") + (synopsis + "Backported Control.Monad.Except module from mtl") + (description + "This package backports the \"Control.Monad.Except\" module from +mtl (if using mtl-2.2.0.1 or earlier), which reexports the ExceptT +monad transformer and the MonadError class. + +This package should only be used if there is a need to use the +Control.Monad.Except module specifically. If you just want the mtl +class instances for ExceptT, use transformers-compat instead, since +mtl-compat does nothing but reexport the instances from that package. + +Note that unlike how mtl-2.2 or later works, the +\"Control.Monad.Except\" module defined in this package exports all of +ExceptT's monad class instances. Therefore, you may have to declare +import Control.Monad.Except () at the top of your file to get all of +the ExceptT instances in scope.") + (license license:bsd-3))) + (define-public ghc-murmur-hash (package (name "ghc-murmur-hash") -- 2.24.0