module Symantic.Parser.Machine
  ( module Symantic.Parser.Machine
  , module Symantic.Parser.Machine.Generate
  , module Symantic.Parser.Machine.Input
  , module Symantic.Parser.Machine.Instructions
  , module Symantic.Parser.Machine.View
  ) where
import Data.Function ((.))
import Data.Ord (Ord)
import Symantic.Parser.Machine.Input
import Symantic.Parser.Grammar
import Text.Show (Show)
import qualified Language.Haskell.TH.Syntax as TH

import Symantic.Parser.Machine.Instructions
import Symantic.Parser.Machine.Build
import Symantic.Parser.Machine.Generate
import Symantic.Parser.Machine.View

-- * Type 'Parser'
type Parser inp = ParserRepr Gen inp

-- | Like a 'Parser' but not bound to the 'Gen' interpreter.
type ParserRepr repr inp =
  ObserveSharing TH.Name
                 (OptimizeGrammar TH.Name
                               (Machine repr inp))

-- | Build a 'Machine' able to 'generate' the given 'Parser'.
machine :: forall inp repr a.
  Ord (InputToken inp) =>
  Show (InputToken inp) =>
  TH.Lift (InputToken inp) =>
  Executable (InputToken inp) repr =>
  Grammar (Machine repr inp) =>
  ParserRepr repr inp a ->
  repr inp '[] ('Succ 'Zero) a
machine = runMachine . optimizeGrammar . observeSharing