{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE TypeFamilies #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
module Language.Symantic.Type.List where

import Data.Proxy

import Language.Symantic.Type.Common

-- * Type 'Type_List'
-- | The list type.
type Type_List = Type_Type1 []
instance -- String_from_Type
 String_from_Type root =>
 String_from_Type (Type_List root) where
	string_from_type (Type_Type1 _f a) =
		"[" ++ string_from_type a ++ "]"

-- | Inject a 'Type_List' within a root type.
type_list
 :: Type_Root_Lift Type_List root
 => root h_a
 -> root ([] h_a)
type_list = type_root_lift . Type_Type1 (Proxy::Proxy [])