From 98329e0a3dd4f78b5d815ac3896272ec70904901 Mon Sep 17 00:00:00 2001 From: Eugen Wissner Date: Thu, 11 Dec 2025 10:28:11 +0100 Subject: Add remaining haskell book exercises --- Haskell-book/18/Instance/src/Nope.hs | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 Haskell-book/18/Instance/src/Nope.hs (limited to 'Haskell-book/18/Instance/src/Nope.hs') 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 -- cgit v1.2.3