forked from mirrors/nixpkgs
29 lines
738 B
Diff
29 lines
738 B
Diff
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diff -ru3 unlambda-0.1.3-old/Language/Unlambda.hs unlambda-0.1.3/Language/Unlambda.hs
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--- unlambda-0.1.3-old/Language/Unlambda.hs 2015-04-17 21:16:32.415751612 +0300
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+++ unlambda-0.1.3/Language/Unlambda.hs 2015-04-17 21:25:38.210123501 +0300
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@@ -29,6 +29,7 @@
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import Prelude hiding(catch)
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#endif
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import Control.Exception (catch, IOException)
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+import Control.Monad (liftM, ap)
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------------------------------------------------------------------------
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-- Abstract syntax
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@@ -85,6 +86,16 @@
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type Cont a = (Maybe Char, Int) -> a -> IO Exp
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+instance Functor Eval where
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+
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+ fmap = liftM
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+
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+instance Applicative Eval where
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+
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+ pure = return
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+
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+ (<*>) = ap
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+
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instance Monad Eval where
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(Eval cp1) >>= f = Eval $ \dat1 cont2 ->
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