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Merged
RyanGlScott merged 1 commit into from
Jul 10, 2026
Merged

Support Generically and Generically1. #73

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3 changes: 3 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
@@ -1,3 +1,6 @@
### 3.11.5
* Support `Generically` and `Generically1` from `base-4.17` (GHC 9.4) or later in addition to `FromGeneric` and `FromGeneric1`.

### 3.11.4 [2026.06.19]
* Make the test suite report source locations for test failures accurately.

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1 change: 1 addition & 0 deletions src/TextShow.hs
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Expand Up @@ -89,5 +89,6 @@ import Prelude ()

import TextShow.Classes
import TextShow.FromStringTextShow
import TextShow.Generic ()
import TextShow.Instances ()
import TextShow.Utils (toString, toText, lengthB, unlinesB, unwordsB)
20 changes: 20 additions & 0 deletions src/TextShow/Generic.hs
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Expand Up @@ -25,9 +25,12 @@
{-# LANGUAGE UndecidableInstances #-}

#if __GLASGOW_HASKELL__ >= 806
{-# LANGUAGE DerivingVia #-}
{-# LANGUAGE QuantifiedConstraints #-}
#endif

{-# OPTIONS_GHC -Wno-orphans #-}
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{-|
Module: TextShow.Generic
Copyright: (C) 2014-2017 Ryan Scott
Expand Down Expand Up @@ -219,6 +222,23 @@ instance ( Generic1 f
) => TextShow1 (FromGeneric1 f) where
liftShowbPrec sp sl p = genericLiftShowbPrec sp sl p . fromGeneric1

#if MIN_VERSION_base(4,17,0)
-- | The 'TextShow' instance for 'Generically' behaves exactly like the instance for 'FromGeneric'.
--
-- /Since: 3.11.5/
deriving via FromGeneric a instance (Generic a, GTextShowB (Rep a ())) => TextShow (Generically a)

-- | The 'TextShow' instance for 'Generically1' behaves exactly like the instance for 'FromGeneric1'.
--
-- /Since: 3.11.5/
deriving via FromGeneric1 f a instance (Generic1 f, GTextShowB (Rep1 f a)) => TextShow (Generically1 f a)

-- | The 'TextShow1' instance for 'Generically1' behaves exactly like the instance for 'FromGeneric1'.
--
-- /Since: 3.11.5/
deriving via FromGeneric1 (f :: * -> *) instance (Generic1 f, GTextShowB1 (Rep1 f)) => TextShow1 (Generically1 f)
#endif

-- | A 'Generic' implementation of 'showt'.
--
-- /Since: 2/
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