1 files changed, 18 insertions, 0 deletions
diff --git a/src/Util.hs b/src/Util.hs
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+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE TypeSynonymInstances #-}
+
+module Util (Normalisable(..)) where
+
+import Data.Maybe (fromMaybe)
+import qualified Data.Text as T
+
+----------------------------------------------------------------------------------------------------
+class Normalisable a where
+  normaliseVariant :: a -> a
+
+instance Normalisable [Char] where
+  normaliseVariant = T.unpack . normaliseVariant . T.pack
+
+instance Normalisable T.Text where
+  normaliseVariant str = fromMaybe str (T.stripSuffix (T.pack "'") str)
+