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[feat] allow passing list literals to mod builders #488

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[feat] allow passing list literals to mod builders #488

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68cec7d
[feat] allow passing list literals to mod builders
MangoIV May 24, 2024
87d74a7
[chore] use backwards compatible import
MangoIV May 27, 2024
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12 changes: 12 additions & 0 deletions src/Options/Applicative/Builder.hs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
{-# LANGUAGE CPP #-}
{-# LANGUAGE TypeFamilies #-}
module Options.Applicative.Builder (
-- * Parser builders
--
Expand Down Expand Up @@ -118,6 +119,7 @@ import Options.Applicative.Common
import Options.Applicative.Types
import Options.Applicative.Help.Pretty
import Options.Applicative.Help.Chunk
import GHC.Exts (IsList(..))

-- Readers --

Expand Down Expand Up @@ -383,6 +385,11 @@ option r m = mkParser d g rdr
newtype InfoMod a = InfoMod
{ applyInfoMod :: ParserInfo a -> ParserInfo a }

instance IsList (InfoMod a) where
type Item (InfoMod a) = InfoMod a
fromList = mconcat
toList = pure

instance Monoid (InfoMod a) where
mempty = InfoMod id
mappend = (<>)
Expand Down Expand Up @@ -474,6 +481,11 @@ instance Monoid PrefsMod where
mempty = PrefsMod id
mappend = (<>)

instance IsList PrefsMod where
type Item PrefsMod = PrefsMod
fromList = mconcat
toList = pure

instance Semigroup PrefsMod where
m1 <> m2 = PrefsMod $ applyPrefsMod m2 . applyPrefsMod m1

Expand Down
7 changes: 7 additions & 0 deletions src/Options/Applicative/Builder/Internal.hs
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
{-# LANGUAGE TypeFamilies #-}
module Options.Applicative.Builder.Internal (
-- * Internals
Mod(..),
Expand Down Expand Up @@ -31,6 +32,7 @@ import Prelude

import Options.Applicative.Common
import Options.Applicative.Types
import GHC.Exts (IsList(..))

data OptionFields a = OptionFields
{ optNames :: [OptName]
Expand Down Expand Up @@ -127,6 +129,11 @@ data Mod f a = Mod (f a -> f a)
(DefaultProp a)
(OptProperties -> OptProperties)

instance IsList (Mod f a) where
type Item (Mod f a) = Mod f a
fromList = mconcat
toList = pure

optionMod :: (OptProperties -> OptProperties) -> Mod f a
optionMod = Mod id mempty

Expand Down