From d3503422e216d627c28a510e8402d054bfa61dd3 Mon Sep 17 00:00:00 2001
From: Nikolay Amiantov <ab@fmap.me>
Date: Fri, 17 Apr 2015 23:50:14 +0300
Subject: [PATCH] haskellngPackages.IOSpec: fix for GHC 7.10

---
 .../haskell-modules/IOSpec-fix-ghc710.patch   | 89 +++++++++++++++++++
 .../configuration-ghc-7.10.x.nix              |  3 +
 2 files changed, 92 insertions(+)
 create mode 100644 pkgs/development/haskell-modules/IOSpec-fix-ghc710.patch

diff --git a/pkgs/development/haskell-modules/IOSpec-fix-ghc710.patch b/pkgs/development/haskell-modules/IOSpec-fix-ghc710.patch
new file mode 100644
index 000000000000..4bc4a57ad348
--- /dev/null
+++ b/pkgs/development/haskell-modules/IOSpec-fix-ghc710.patch
@@ -0,0 +1,89 @@
+diff -ru3 IOSpec-0.2.5-old/src/Test/IOSpec/STM.hs IOSpec-0.2.5/src/Test/IOSpec/STM.hs
+--- IOSpec-0.2.5-old/src/Test/IOSpec/STM.hs	2015-04-17 21:32:51.062498481 +0300
++++ IOSpec-0.2.5/src/Test/IOSpec/STM.hs	2015-04-17 21:39:50.451032159 +0300
+@@ -23,6 +23,7 @@
+ import Data.Dynamic
+ import Data.Maybe (fromJust)
+ import Control.Monad.State
++import Control.Monad (ap)
+ 
+ -- The 'STMS' data type and its instances.
+ --
+@@ -67,14 +68,18 @@
+   fmap _ Retry              = Retry
+   fmap f (OrElse io1 io2)   = OrElse (fmap f io1) (fmap f io2)
+ 
++instance Applicative STM where
++  pure  = STMReturn
++  (<*>) = ap
++
+ instance Monad STM where
+-    return                = STMReturn
+-    STMReturn a >>= f     = f a
+-    NewTVar d g >>= f     = NewTVar d (\l -> g l >>= f)
+-    ReadTVar l g >>= f    = ReadTVar l (\d -> g d >>= f)
+-    WriteTVar l d p >>= f = WriteTVar l d (p >>= f)
+-    Retry >>= _           = Retry
+-    OrElse p q >>= f      = OrElse (p >>= f) (q >>= f)
++  return                = STMReturn
++  STMReturn a >>= f     = f a
++  NewTVar d g >>= f     = NewTVar d (\l -> g l >>= f)
++  ReadTVar l g >>= f    = ReadTVar l (\d -> g d >>= f)
++  WriteTVar l d p >>= f = WriteTVar l d (p >>= f)
++  Retry >>= _           = Retry
++  OrElse p q >>= f      = OrElse (p >>= f) (q >>= f)
+ 
+ -- | A 'TVar' is a shared, mutable variable used by STM.
+ newtype TVar a = TVar Loc
+diff -ru3 IOSpec-0.2.5-old/src/Test/IOSpec/Types.hs IOSpec-0.2.5/src/Test/IOSpec/Types.hs
+--- IOSpec-0.2.5-old/src/Test/IOSpec/Types.hs	2015-04-17 21:32:51.062498481 +0300
++++ IOSpec-0.2.5/src/Test/IOSpec/Types.hs	2015-04-17 21:37:02.306575081 +0300
+@@ -15,6 +15,8 @@
+   , inject
+   ) where
+ 
++import Control.Monad (ap)
++
+ -- | A value of type 'IOSpec' @f@ @a@ is either a pure value of type @a@
+ -- or some effect, determined by @f@. Crucially, 'IOSpec' @f@ is a
+ -- monad, provided @f@ is a functor.
+@@ -26,6 +28,10 @@
+   fmap f (Pure x)   = Pure (f x)
+   fmap f (Impure t) = Impure (fmap (fmap f) t)
+ 
++instance (Functor f) => Applicative (IOSpec f) where
++  pure             = Pure
++  (<*>)            = ap
++
+ instance (Functor f) => Monad (IOSpec f) where
+   return           = Pure
+   (Pure x) >>= f   = f x
+@@ -61,4 +67,4 @@
+     inj = Inr . inj
+ 
+ inject :: (g :<: f) => g (IOSpec f a) -> IOSpec f a
+-inject = Impure . inj
+\ No newline at end of file
++inject = Impure . inj
+diff -ru3 IOSpec-0.2.5-old/src/Test/IOSpec/VirtualMachine.hs IOSpec-0.2.5/src/Test/IOSpec/VirtualMachine.hs
+--- IOSpec-0.2.5-old/src/Test/IOSpec/VirtualMachine.hs	2015-04-17 21:32:51.062498481 +0300
++++ IOSpec-0.2.5/src/Test/IOSpec/VirtualMachine.hs	2015-04-17 21:39:47.222044580 +0300
+@@ -43,6 +43,7 @@
+ import qualified Data.Stream as Stream
+ import Test.IOSpec.Types
+ import Test.QuickCheck
++import Control.Monad (ap)
+ 
+ type Data         = Dynamic
+ type Loc          = Int
+@@ -211,6 +212,10 @@
+   fmap f (Print c t) = Print c (fmap f t)
+   fmap _ (Fail msg) = Fail msg
+ 
++instance Applicative Effect where
++  pure = Done
++  (<*>) = ap
++
+ instance Monad Effect where
+   return = Done
+   (Done x) >>= f = f x
diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
index ead618705198..f1458be845a9 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
@@ -318,4 +318,7 @@ self: super: {
   brainfuck = appendPatch super.brainfuck ./brainfuck-fix-ghc710.patch;
   unlambda = appendPatch super.unlambda ./unlambda-fix-ghc710.patch;
 
+  # Sent e-mail to the maintainer.
+  IOSpec = appendPatch super.IOSpec ./IOSpec-fix-ghc710.patch;
+
 }