Language/Symantic/Compiling/IO.hs

   1 {-# LANGUAGE UndecidableInstances #-}
   2 {-# OPTIONS_GHC -fno-warn-orphans #-}
   3 {-# OPTIONS_GHC -fconstraint-solver-iterations=5 #-}
   4 -- | Symantic for 'IO'.
   5 module Language.Symantic.Compiling.IO where
   6
   7 import Control.Monad (liftM, liftM2)
   8 import Data.Proxy
   9 import Data.Text (Text)
  10 import Data.Type.Equality ((:~:)(Refl))
  11 import qualified System.IO as IO
  12
  13 import Language.Symantic.Parsing
  14 import Language.Symantic.Typing
  15 import Language.Symantic.Compiling.Term
  16 import Language.Symantic.Interpreting
  17 import Language.Symantic.Transforming.Trans
  18
  19 -- * Class 'Sym_IO'
  20 class Sym_IO term where
  21         io_hClose   :: term IO.Handle -> term (IO ())
  22         io_openFile :: term IO.FilePath -> term IO.IOMode -> term (IO IO.Handle)
  23
  24         default io_hClose   :: Trans t term => t term IO.Handle -> t term (IO ())
  25         default io_openFile :: Trans t term => t term IO.FilePath -> t term IO.IOMode -> t term (IO IO.Handle)
  26
  27         io_hClose   = trans_map1 io_hClose
  28         io_openFile = trans_map2 io_openFile
  29
  30 type instance Sym_of_Iface (Proxy IO) = Sym_IO
  31 type instance Consts_of_Iface (Proxy IO) = Proxy IO ': Consts_imported_by IO
  32 type instance Consts_imported_by IO =
  33  [ Proxy IO.Handle
  34  , Proxy IO.IOMode
  35  , Proxy Applicative
  36  , Proxy Functor
  37  , Proxy Monad
  38  ]
  39 type instance Consts_imported_by IO.Handle =
  40  '[ Proxy Eq
  41  ]
  42 type instance Consts_imported_by IO.IOMode =
  43  [ Proxy Enum
  44  , Proxy Eq
  45  , Proxy Ord
  46  ]
  47
  48 instance Sym_IO HostI where
  49         io_hClose   = liftM IO.hClose
  50         io_openFile = liftM2 IO.openFile
  51 instance Sym_IO TextI where
  52         io_hClose   = textI1 "IO.hClose"
  53         io_openFile = textI2 "IO.openFile"
  54 instance (Sym_IO r1, Sym_IO r2) => Sym_IO (DupI r1 r2) where
  55         io_hClose   = dupI1 (Proxy @Sym_IO) io_hClose
  56         io_openFile = dupI2 (Proxy @Sym_IO) io_openFile
  57
  58 instance
  59  ( Read_TypeNameR Text cs rs
  60  , Inj_Const cs IO
  61  ) => Read_TypeNameR Text cs (Proxy IO ': rs) where
  62         read_typenameR _cs "IO" k = k (ty @IO)
  63         read_typenameR _rs raw k = read_typenameR (Proxy @rs) raw k
  64 instance
  65  ( Read_TypeNameR Text cs rs
  66  , Inj_Const cs IO.Handle
  67  ) => Read_TypeNameR Text cs (Proxy IO.Handle ': rs) where
  68         read_typenameR _cs "IO.Handle" k = k (ty @IO.Handle)
  69         read_typenameR _rs raw k = read_typenameR (Proxy @rs) raw k
  70 instance
  71  ( Read_TypeNameR Text cs rs
  72  , Inj_Const cs IO.IOMode
  73  ) => Read_TypeNameR Text cs (Proxy IO.IOMode ': rs) where
  74         read_typenameR _cs "IO.Mode" k = k (ty @IO.IOMode)
  75         read_typenameR _rs raw k = read_typenameR (Proxy @rs) raw k
  76
  77 instance Show_Const cs => Show_Const (Proxy IO ': cs) where
  78         show_const ConstZ{} = "IO"
  79         show_const (ConstS c) = show_const c
  80 instance Show_Const cs => Show_Const (Proxy IO.Handle ': cs) where
  81         show_const ConstZ{} = "IO.Handle"
  82         show_const (ConstS c) = show_const c
  83 instance Show_Const cs => Show_Const (Proxy IO.IOMode ': cs) where
  84         show_const ConstZ{} = "IO.IOMode"
  85         show_const (ConstS c) = show_const c
  86
  87 instance -- Proj_ConC IO
  88  ( Proj_Const cs IO
  89  , Proj_Consts cs (Consts_imported_by IO)
  90  ) => Proj_ConC cs (Proxy IO) where
  91         proj_conC _ (TyConst q :$ TyConst c)
  92          | Just Refl <- eq_skind (kind_of_const c) (SKiType `SKiArrow` SKiType)
  93          , Just Refl <- proj_const c (Proxy::Proxy IO)
  94          = case () of
  95                  _ | Just Refl <- proj_const q (Proxy::Proxy Applicative) -> Just Con
  96                    | Just Refl <- proj_const q (Proxy::Proxy Functor)     -> Just Con
  97                    | Just Refl <- proj_const q (Proxy::Proxy Monad)       -> Just Con
  98                  _ -> Nothing
  99         proj_conC _c _q = Nothing
 100 instance -- Proj_ConC IO.Handle
 101  ( Proj_Const cs IO.Handle
 102  , Proj_Consts cs (Consts_imported_by IO.Handle)
 103  ) => Proj_ConC cs (Proxy IO.Handle) where
 104         proj_conC _ (TyConst q :$ TyConst c)
 105          | Just Refl <- eq_skind (kind_of_const c) SKiType
 106          , Just Refl <- proj_const c (Proxy::Proxy IO.Handle)
 107          = case () of
 108                  _ | Just Refl <- proj_const q (Proxy::Proxy Eq) -> Just Con
 109                  _ -> Nothing
 110         proj_conC _c _q = Nothing
 111 instance -- Proj_ConC IO.IOMode
 112  ( Proj_Const cs IO.IOMode
 113  , Proj_Consts cs (Consts_imported_by IO.IOMode)
 114  ) => Proj_ConC cs (Proxy IO.IOMode) where
 115         proj_conC _ (TyConst q :$ TyConst c)
 116          | Just Refl <- eq_skind (kind_of_const c) SKiType
 117          , Just Refl <- proj_const c (Proxy::Proxy IO.IOMode)
 118          = case () of
 119                  _ | Just Refl <- proj_const q (Proxy::Proxy Enum) -> Just Con
 120                    | Just Refl <- proj_const q (Proxy::Proxy Eq)   -> Just Con
 121                    | Just Refl <- proj_const q (Proxy::Proxy Ord)  -> Just Con
 122                  _ -> Nothing
 123         proj_conC _c _q = Nothing
 124 data instance TokenT meta (ts::[*]) (Proxy IO)
 125  = Token_Term_IO_hClose   (EToken meta ts)
 126  | Token_Term_IO_openFile (EToken meta ts)
 127 deriving instance Eq_Token meta ts => Eq (TokenT meta ts (Proxy IO))
 128 deriving instance Show_Token meta ts => Show (TokenT meta ts (Proxy IO))
 129 instance -- CompileI
 130  ( Inj_Const (Consts_of_Ifaces is) IO
 131  , Inj_Const (Consts_of_Ifaces is) IO.Handle
 132  , Inj_Const (Consts_of_Ifaces is) []
 133  , Inj_Const (Consts_of_Ifaces is) Char
 134  , Inj_Const (Consts_of_Ifaces is) IO.IOMode
 135  , Inj_Const (Consts_of_Ifaces is) (->)
 136  , Inj_Const (Consts_of_Ifaces is) ()
 137  , Compile is
 138  ) => CompileI is (Proxy IO) where
 139         compileI tok ctx k =
 140                 case tok of
 141                  Token_Term_IO_hClose tok_h ->
 142                         -- hClose :: Handle -> IO ()
 143                         compileO tok_h ctx $ \ty_h (TermO h) ->
 144                         check_type
 145                          (At Nothing (ty @IO.Handle))
 146                          (At (Just tok_h) ty_h) $ \Refl ->
 147                         k (ty @IO :$ ty @()) $ TermO $
 148                                 io_hClose . h
 149                  Token_Term_IO_openFile tok_fp ->
 150                         -- openFile :: FilePath -> IOMode -> IO Handle
 151                         compileO tok_fp ctx $ \ty_fp (TermO fp) ->
 152                         check_type
 153                          (At Nothing tyFilePath)
 154                          (At (Just tok_fp) ty_fp) $ \Refl ->
 155                         k (ty @IO.IOMode ~> ty @IO :$ ty @IO.Handle) $ TermO $
 156                          \c -> lam $ io_openFile (fp c)
 157                 where tyFilePath = ty @[] :$ ty @Char