Add remaining haskell book exercises

1 files changed, 23 insertions, 0 deletions

diff --git a/Haskell-book/18/Instance/src/Nope.hs b/Haskell-book/18/Instance/src/Nope.hs
new file mode 100644
index 0000000..9a7fea1
--- /dev/null
+++ b/Haskell-book/18/Instance/src/Nope.hs
@@ -0,0 +1,23 @@
+module Nope where
+
+import Test.QuickCheck
+import Test.QuickCheck.Checkers
+
+data Nope a = NopeDotJpg deriving (Show, Eq)
+
+instance Functor Nope where
+    fmap _ _ = NopeDotJpg
+
+instance Applicative Nope where
+    pure _ = NopeDotJpg
+    _ <*> _ = NopeDotJpg
+
+instance Monad Nope where
+    return _ = NopeDotJpg
+    _ >>= _ = NopeDotJpg
+
+instance Arbitrary (Nope a) where
+    arbitrary = return NopeDotJpg
+
+instance EqProp (Nope a) where
+    (=-=) = eq