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Diffstat (limited to 'functor/h3.hs')
| -rw-r--r-- | functor/h3.hs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/functor/h3.hs b/functor/h3.hs new file mode 100644 index 0000000..1a048f6 --- /dev/null +++ b/functor/h3.hs @@ -0,0 +1,6 @@ +data ITree a = + Leaf (Int -> a) | Node [ITree a] + +instance Functor ITree where + fmap f (Node x) = Node (fmap (fmap f) x) + fmap f (Leaf x) = Leaf (f.x) |