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

import Data.Proxy

import Language.Symantic.Type.Common

-- * Type 'Type_Maybe'
-- | The 'Maybe' type.
type Type_Maybe = Type_Type1 Maybe

instance -- String_from_Type
 String_from_Type root =>
 String_from_Type (Type_Maybe root) where
	string_from_type (Type_Type1 _f a) =
		"Maybe" ++ " (" ++ string_from_type a ++ ")"

-- | Inject a 'Type_Maybe' within a root type.
type_maybe
 :: Lift_Type_Root Type_Maybe root
 => root h_a
 -> root (Maybe h_a)
type_maybe = lift_type_root . Type_Type1 (Proxy::Proxy Maybe)