Language/Symantic/Lib/Char.hs

   1 {-# LANGUAGE UndecidableInstances #-}
   2 {-# OPTIONS_GHC -fno-warn-orphans #-}
   3 -- | Symantic for 'Char'.
   4 module Language.Symantic.Lib.Char where
   5
   6 import Control.Monad (liftM)
   7 import qualified Data.Char as Char
   8 import Data.Proxy
   9 import qualified Data.Text as Text
  10 import Data.Type.Equality ((:~:)(Refl))
  11
  12 import Language.Symantic.Parsing hiding (char)
  13 import qualified Language.Symantic.Parsing.Grammar as Gram
  14 import Language.Symantic.Typing
  15 import Language.Symantic.Compiling
  16 import Language.Symantic.Interpreting
  17 import Language.Symantic.Transforming
  18 import Language.Symantic.Lib.Lambda
  19
  20 -- * Class 'Sym_Char'
  21 class Sym_Char term where
  22         char :: Char -> term Char
  23         char_toUpper :: term Char -> term Char
  24         char_toLower :: term Char -> term Char
  25
  26         default char :: Trans t term => Char -> t term Char
  27         default char_toUpper :: Trans t term => t term Char -> t term Char
  28         default char_toLower :: Trans t term => t term Char -> t term Char
  29
  30         char = trans_lift . char
  31         char_toUpper = trans_map1 char_toUpper
  32         char_toLower = trans_map1 char_toLower
  33
  34 type instance Sym_of_Iface (Proxy Char) = Sym_Char
  35 type instance Consts_of_Iface (Proxy Char) = Proxy Char ': Consts_imported_by Char
  36 type instance Consts_imported_by Char =
  37  [ Proxy Bounded
  38  , Proxy Enum
  39  , Proxy Eq
  40  , Proxy Ord
  41  , Proxy Show
  42  ]
  43
  44 instance Sym_Char HostI where
  45         char = HostI
  46         char_toUpper = liftM Char.toUpper
  47         char_toLower = liftM Char.toLower
  48 instance Sym_Char TextI where
  49         char a = TextI $ \_p _v ->
  50                 Text.pack (show a)
  51         char_toUpper = textI1 "Char.toUpper"
  52         char_toLower = textI1 "Char.toLower"
  53 instance (Sym_Char r1, Sym_Char r2) => Sym_Char (DupI r1 r2) where
  54         char x = char x `DupI` char x
  55         char_toUpper = dupI1 (Proxy @Sym_Char) char_toUpper
  56         char_toLower = dupI1 (Proxy @Sym_Char) char_toLower
  57
  58 instance
  59  ( Read_TypeNameR Type_Name cs rs
  60  , Inj_Const cs Char
  61  ) => Read_TypeNameR Type_Name cs (Proxy Char ': rs) where
  62         read_typenameR _cs (Type_Name "Char") k = k (ty @Char)
  63         read_typenameR _rs raw k = read_typenameR (Proxy @rs) raw k
  64 instance Show_Const cs => Show_Const (Proxy Char ': cs) where
  65         show_const ConstZ{} = "Char"
  66         show_const (ConstS c) = show_const c
  67
  68 instance -- Proj_ConC
  69  ( Proj_Const cs Char
  70  , Proj_Consts cs (Consts_imported_by Char)
  71  ) => Proj_ConC cs (Proxy Char) where
  72         proj_conC _ (TyConst q :$ TyConst c)
  73          | Just Refl <- eq_skind (kind_of_const c) SKiType
  74          , Just Refl <- proj_const c (Proxy @Char)
  75          = case () of
  76                  _ | Just Refl <- proj_const q (Proxy @Bounded) -> Just Con
  77                    | Just Refl <- proj_const q (Proxy @Enum)    -> Just Con
  78                    | Just Refl <- proj_const q (Proxy @Eq)      -> Just Con
  79                    | Just Refl <- proj_const q (Proxy @Ord)     -> Just Con
  80                    | Just Refl <- proj_const q (Proxy @Show)    -> Just Con
  81                  _ -> Nothing
  82         proj_conC _c _q = Nothing
  83 data instance TokenT meta (ts::[*]) (Proxy Char)
  84  = Token_Term_Char Char
  85  | Token_Term_Char_toUpper
  86  | Token_Term_Char_toLower
  87 deriving instance Eq_Token meta ts => Eq (TokenT meta ts (Proxy Char))
  88 deriving instance Show_Token meta ts => Show (TokenT meta ts (Proxy Char))
  89 instance -- CompileI
  90  ( Inj_Const (Consts_of_Ifaces is) Char
  91  , Inj_Const (Consts_of_Ifaces is) (->)
  92  ) => CompileI is (Proxy Char) where
  93         compileI tok _ctx k =
  94                 case tok of
  95                  Token_Term_Char c -> k (ty @Char) $ TermO $ \_c -> char c
  96                  Token_Term_Char_toUpper -> from_op char_toUpper
  97                  Token_Term_Char_toLower -> from_op char_toLower
  98                 where
  99                 from_op (op::forall term. Sym_Char term => term Char -> term Char) =
 100                         k (ty @Char ~> ty @Char) $ TermO $ \_c -> lam op
 101 instance -- TokenizeT
 102  Inj_Token meta ts Char =>
 103  TokenizeT meta ts (Proxy Char) where
 104         tokenizeT _t = mempty
 105          { tokenizers_infix = tokenizeTMod [Mod_Name "Char"]
 106                  [ tokenize0 "toLower" infixN5 Token_Term_Char_toLower
 107                  , tokenize0 "toUpper" infixN5 Token_Term_Char_toUpper
 108                  ]
 109          }
 110 instance -- Gram_Term_AtomsT
 111  ( Alt g
 112  , Gram_Rule g
 113  , Gram_Lexer g
 114  , Gram_Meta meta g
 115  , Inj_Token meta ts Char
 116  ) => Gram_Term_AtomsT meta ts (Proxy Char) g where
 117         term_atomsT _t =
 118          [ rule "term_char" $
 119                 lexeme $ metaG $
 120                 (\c meta -> ProTok $ inj_etoken meta $ Token_Term_Char c)
 121                  <$> Gram.between tickG tickG (
 122                         Gram.cf_of_term (Gram.any `Gram.but` tickG) Gram.<+>
 123                         '\'' <$ Gram.string "\\'"
 124                  )
 125          ]
 126                 where
 127                 tickG :: Gram_Terminal g' => g' Char
 128                 tickG = Gram.char '\''