{-# LANGUAGE ExplicitForAll #-}

module Witch.Lift where

import qualified Data.Typeable as Typeable
import qualified Language.Haskell.TH.Syntax as TH
import qualified Witch.TryFrom as TryFrom
import qualified Witch.Utility as Utility

-- | This is like 'Utility.unsafeFrom' except that it works at compile time
-- rather than runtime.
--
-- > -- Avoid this:
-- > unsafeFrom @s "some literal"
-- >
-- > -- Prefer this:
-- > $$(liftedFrom @s "some literal")
liftedFrom
  :: forall source target
   . ( TryFrom.TryFrom source target
     , TH.Lift target
     , Show source
     , Typeable.Typeable source
     , Typeable.Typeable target
     )
  => source
  -> TH.Q (TH.TExp target)
liftedFrom :: source -> Q (TExp target)
liftedFrom = target -> Q (TExp target)
forall t. Lift t => t -> Q (TExp t)
TH.liftTyped (target -> Q (TExp target))
-> (source -> target) -> source -> Q (TExp target)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. source -> target
forall source target.
(HasCallStack, TryFrom source target, Show source, Typeable source,
 Typeable target) =>
source -> target
Utility.unsafeFrom

-- | This is like 'Utility.unsafeInto' except that it works at compile time
-- rather than runtime.
--
-- > -- Avoid this:
-- > unsafeInto @t "some literal"
-- >
-- > -- Prefer this:
-- > $$(liftedInto @t "some literal")
liftedInto
  :: forall target source
   . ( TryFrom.TryFrom source target
     , TH.Lift target
     , Show source
     , Typeable.Typeable source
     , Typeable.Typeable target
     )
  => source
  -> TH.Q (TH.TExp target)
liftedInto :: source -> Q (TExp target)
liftedInto = source -> Q (TExp target)
forall source target.
(TryFrom source target, Lift target, Show source, Typeable source,
 Typeable target) =>
source -> Q (TExp target)
liftedFrom