{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeFamilies #-}
module Language.Symantic.Type.Ordering where

import Data.Maybe (isJust)
import Data.Type.Equality ((:~:)(Refl))

import Language.Symantic.Type.Common

-- * Type 'Type_Ordering'
-- | The 'Ordering' type.
data Type_Ordering (root:: * -> *) h where
	Type_Ordering :: Type_Ordering root Ordering
type instance Root_of_Type      (Type_Ordering root) = root
type instance Error_of_Type ast (Type_Ordering root) = No_Error_Type

instance -- Eq_Type
 Eq_Type (Type_Ordering root) where
	eq_type Type_Ordering Type_Ordering = Just Refl
instance -- Eq
 Eq (Type_Ordering root h) where
	x == y = isJust $ x `eq_type` y
instance -- String_from_Type
 String_from_Type (Type_Ordering root) where
	string_from_type Type_Ordering = "Ordering"
instance -- Show
 Show (Type_Ordering root h) where
	show = string_from_type

-- | Convenient alias to include a 'Type_Ordering' within a type.
type_ordering :: Type_Root_Lift Type_Ordering root => root Ordering
type_ordering = type_root_lift Type_Ordering