From 22fc8bffd0ee10d4e7e4ad7f4c65b472fea4fb50 Mon Sep 17 00:00:00 2001 From: Joe Zhao Date: Wed, 25 Mar 2015 15:14:35 +0800 Subject: first commit --- functor/h1.hs | 7 +++++++ 1 file changed, 7 insertions(+) create mode 100644 functor/h1.hs (limited to 'functor/h1.hs') diff --git a/functor/h1.hs b/functor/h1.hs new file mode 100644 index 0000000..11688ad --- /dev/null +++ b/functor/h1.hs @@ -0,0 +1,7 @@ +data MyEither a b = MyLeft a | MyRight b + deriving (Show) + +instance Functor (MyEither a) where + fmap f (MyLeft a) = MyLeft a + fmap f (MyRight b) = MyRight (f b) + -- cgit v1.2.3-70-g09d2