Coercion.hs

{-# LANGUAGE CPP #-}
{-# LANGUAGE PolyKinds #-}
{-# OPTIONS_GHC -Wno-orphans #-}

{-|
Module:      Instances.Data.Type.Coercion
Copyright:   (C) 2014-2017 Ryan Scott
License:     BSD-style (see the file LICENSE)
Maintainer:  Ryan Scott
Stability:   Provisional
Portability: GHC

'Arbitrary' instance for 'Coercion'.
-}
module Instances.Data.Type.Coercion () where

import Data.Coerce (Coercible)
import Data.Type.Coercion (Coercion(..))

import Test.QuickCheck (Arbitrary(..), arbitraryBoundedEnum)

instance Coercible a b => Arbitrary (Coercion a b) where
    arbitrary = arbitraryBoundedEnum