-- Copyright 2021 Google LLC
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
--      http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.

{-# LANGUAGE KindSignatures #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE TypeOperators #-}

module Data.Ten.Update (Update10, EqualityTable(..), equalityTable) where

import Data.Kind (Type)
import Data.Type.Equality ((:~:)(..))
import GHC.Generics ((:.:)(..))

class Update10 (f :: (k -> Type) -> Type)

newtype EqualityTable f a = EqualityTable (f (Maybe :.: ((:~:) a)))

equalityTable :: Update10 f => f (EqualityTable f)