{-# language Safe #-}

module D10.Safe.Quotes (d10list) where

import D10.Safe.Splices

import Control.Monad.Fail (MonadFail (fail))
import Language.Haskell.TH.Quote (QuasiQuoter (..))
import Prelude hiding (fail)

-- | A list of base-10 digits.
--
-- This quasi-quoter, when used as an expression, produces a
-- value of type @['D10']@.
--
-- >>> [d10list||]
-- []
--
-- >>> [d10list|5|]
-- [D5]
--
-- >>> [d10list|58|]
-- [D5,D8]
--
-- >>> [d10list|a|]
-- ...
-- ... d10 must be between 0 and 9
-- ...
--
-- This quasi-quoter can also be used as a pattern.
--
-- >>> :{
--       case [D5, D6] of
--         [d10list|41|] -> "A"
--         [d10list|56|] -> "B"
--         _             -> "C"
-- >>> :}
-- "B"
--
-- >>> :{
--       case [D5, D6] of
--         [d10list|4x|] -> "A"
--         [d10list|56|] -> "B"
--         _             -> "C"
-- >>> :}
-- ...
-- ... d10 must be between 0 and 9
-- ...

d10list :: QuasiQuoter
d10list :: QuasiQuoter
d10list = QuasiQuoter :: (String -> Q Exp)
-> (String -> Q Pat)
-> (String -> Q Type)
-> (String -> Q [Dec])
-> QuasiQuoter
QuasiQuoter
    { quoteExp :: String -> Q Exp
quoteExp  = String -> Q Exp
d10ListExp
    , quotePat :: String -> Q Pat
quotePat  = String -> Q Pat
d10ListPat
    , quoteType :: String -> Q Type
quoteType = \String
_ -> String -> Q Type
forall (m :: * -> *) a. MonadFail m => String -> m a
fail String
"d10list cannot be used in a type context"
    , quoteDec :: String -> Q [Dec]
quoteDec  = \String
_ -> String -> Q [Dec]
forall (m :: * -> *) a. MonadFail m => String -> m a
fail String
"d10list cannot be used in a declaration context"
    }