[bug#64066] [PATCH 16/19] gnu: Add ghc-ref-tf

[zamfofex]

* gnu/packages/haskell-xyz.scm (ghc-ref-tf): New variable.
---
 gnu/packages/haskell-xyz.scm | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 78cb1ccd39..c8b41baa37 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -16614,6 +16614,26 @@ (define-public ghc-patch
 something else.")
     (license license:bsd-3)))
 
+(define-public ghc-ref-tf
+  (package
+    (name "ghc-ref-tf")
+    (version "0.5.0.1")
+    (source (origin
+              (method url-fetch)
+              (uri (hackage-uri "ref-tf" version))
+              (sha256
+               (base32
+                "0isilgcbw12zyh8s2liaj5r9r5m3yg1xskyhag6f36qi60y29hx5"))))
+    (build-system haskell-build-system)
+    (properties '((upstream-name . "ref-tf")))
+    (home-page "http://hackage.haskell.org/package/ref-tf";)
+    (synopsis "A type class for monads with references using type families.")
+    (description
+     "This package contains a MonadRef type class that abstracts over the 
details of
+manipulating references, allowing one to write code that can operate in either
+the ST monad or the IO monad.")
+    (license license:bsd-3)))
+
 ;;;
 ;;; Avoid adding new packages to the end of this file. To reduce the chances
 ;;; of a merge conflict, place them above by existing packages with similar
-- 
2.40.1