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Add Binary (Proxy a) instance #229

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3 changes: 2 additions & 1 deletion changelog.md
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Original file line number Diff line number Diff line change
@@ -1,10 +1,11 @@
binary
======

binary-0.9.0.0
binary-x.x.x.x
--------------

- Don't reexport `Data.Word` from `Data.Binary`
- Add `Binary (Proxy a)` instance

binary-0.8.9.2
--------------
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5 changes: 5 additions & 0 deletions src/Data/Binary/Class.hs
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Expand Up @@ -4,7 +4,7 @@
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE PatternGuards #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE Trustworthy #-}

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#if MIN_VERSION_base(4,16,0)
#define HAS_TYPELITS_CHAR
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import Data.Bits
import Data.Int
import Data.Complex (Complex(..))
import Data.Proxy (Proxy(..))
#ifdef HAS_VOID
import Data.Void
#endif
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put () = mempty
get = return ()

instance Binary (Proxy a) where
put Proxy = pure ()
get = pure Proxy

-- Bools are encoded as a byte in the range 0 .. 1
instance Binary Bool where
put = putWord8 . fromIntegral . fromEnum
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#if __GLASGOW_HASKELL__ < 901
-- | @since 0.8.4.0
instance Binary a => Binary (Semigroup.Option a) where

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In the use of type constructor or class ‘Option’
get = fmap Semigroup.Option get

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In the use of data constructor ‘Option’
put = put . Semigroup.getOption

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#endif

-- | @since 0.8.4.0
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