71/151: gnu: Add ghc-void.

[Paul]

toothbrush pushed a commit to branch wip-haskell-platform-7.10.2-a
in repository guix.

commit ee4cc12b4df5c86987a10fe4e338a9230e4dff1c
Author: Paul van der Walt <address@hidden>
Date:   Thu Oct 15 14:31:10 2015 +0200

    gnu: Add ghc-void.
    
    * gnu/packages/haskell.scm (ghc-void): New variable.
---
 gnu/packages/haskell.scm |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 8270172..49bc164 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -2504,6 +2504,33 @@ provides alternatives which use the unbounded Integer 
type.")
      "Natural numbers for Haskell.")
     (license bsd-3)))
 
+(define-public ghc-void
+  (package
+    (name "ghc-void")
+    (version "0.7.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "http://hackage.haskell.org/package/void/void-";
+             version
+             ".tar.gz"))
+       (sha256
+        (base32
+         "1x15x2axz84ndw2bf60vjqljhrb0w95lddaljsxrl0hcd29zvw69"))))
+    (build-system haskell-build-system)
+    (propagated-inputs
+     `(("ghc-semigroups" ,ghc-semigroups)))
+    (inputs
+     `(("ghc-hashable" ,ghc-hashable)))
+    (home-page "http://github.com/ekmett/void";)
+    (synopsis
+     "Logically uninhabited data type")
+    (description
+     "A Haskell 98 logically uninhabited data type, used to indicate that a
+given term should not exist.")
+    (license bsd-3)))
+
 (define-public ghc-semigroups
   (package
     (name "ghc-semigroups")