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/15/semigroup/src/Trivial.hs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 Haskell-book/15/semigroup/src/Trivial.hs (limited to 'Haskell-book/15/semigroup/src/Trivial.hs') diff --git a/Haskell-book/15/semigroup/src/Trivial.hs b/Haskell-book/15/semigroup/src/Trivial.hs new file mode 100644 index 0000000..de9a1ad --- /dev/null +++ b/Haskell-book/15/semigroup/src/Trivial.hs @@ -0,0 +1,16 @@ +module Trivial where + +import Data.Semigroup +import Test.QuickCheck + +data Trivial = Trivial deriving (Eq, Show) + +instance Semigroup Trivial where + _ <> _ = Trivial + +instance Arbitrary Trivial where + arbitrary = return Trivial + +instance Monoid Trivial where + mempty = undefined + mappend = (<>) -- cgit v1.2.3