25/27: gnu: Add ghc-prettyclass.

[guix-commits]

rob pushed a commit to branch wip-haskell-updates
in repository guix.

commit eff6a754593a10fb8da3046cd6da5e2960aa86b2
Author: Robert Vollmert <address@hidden>
Date:   Mon Jul 15 10:49:20 2019 +0200

    gnu: Add ghc-prettyclass.
    
    * gnu/packages/haskell-xyz.scm (ghc-prettyclass): New package.
---
 gnu/packages/haskell-xyz.scm | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 43d04b0..7763b94 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -195,3 +195,28 @@ primitives for I/O using streams.")
     (description
      "Low-level bindings to the zlib package.")
     (license license:bsd-3)))
+
+(define-public ghc-prettyclass
+  (package
+    (name "ghc-prettyclass")
+    (version "1.0.0.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://hackage.haskell.org/package/prettyclass/prettyclass-";
+             version
+             ".tar.gz"))
+       (sha256
+        (base32
+         "11l9ajci7nh1r547hx8hgxrhq8mh5gdq30pdf845wvilg9p48dz5"))))
+    (build-system haskell-build-system)
+    (home-page
+     "http://hackage.haskell.org/package/prettyclass";)
+    (synopsis
+     "Pretty printing class similar to Show")
+    (description
+     "Pretty printing class similar to Show, based on the HughesPJ
+pretty printing library.  Provides the pretty printing class and
+instances for the Prelude types.")
+    (license license:bsd-3)))