{-# LANGUAGE FlexibleInstances #-} {-# LANGUAGE MultiParamTypeClasses #-} {-# LANGUAGE ScopedTypeVariables #-} {-# LANGUAGE TypeApplications #-} module CabalGild.Type.List where import qualified CabalGild.Extra.List as List import qualified Data.Proxy as Proxy import qualified Distribution.CabalSpecVersion as CabalSpecVersion import qualified Distribution.Compat.Newtype as Newtype import qualified Distribution.FieldGrammar.Newtypes as Newtypes import qualified Distribution.Parsec as Parsec import qualified Distribution.Pretty as Pretty import qualified Text.PrettyPrint as PrettyPrint newtype List s b a = List { unwrap :: Newtypes.List s b a } instance Newtype.Newtype [a] (List s b a) where pack = List . Newtype.pack unpack = Newtype.unpack . unwrap instance ( Newtype.Newtype a b, Parsec.Parsec b, Newtypes.Sep s ) => Parsec.Parsec (List s b a) where parsec = List <$> Parsec.parsec instance ( Newtype.Newtype a b, Pretty.Pretty b, Newtypes.Sep s ) => Pretty.Pretty (List s b a) where pretty = Pretty.prettyVersioned CabalSpecVersion.CabalSpecV1_0 prettyVersioned v = Newtypes.prettySep (Proxy.Proxy @s) . fmap (Pretty.prettyVersioned @b v . Newtype.pack) . Newtype.unpack instance {-# OVERLAPPING #-} ( Newtype.Newtype a b, Pretty.Pretty b ) => Pretty.Pretty (List Newtypes.CommaFSep b a) where pretty = Pretty.prettyVersioned CabalSpecVersion.CabalSpecV1_0 prettyVersioned v = ( \xs -> if List.compareLength xs 1 == GT && v >= CabalSpecVersion.CabalSpecV2_2 then PrettyPrint.fsep $ fmap (<> PrettyPrint.comma) xs else Newtypes.prettySep (Proxy.Proxy @Newtypes.CommaFSep) xs ) . fmap (Pretty.prettyVersioned @b v . Newtype.pack) . Newtype.unpack