Language/Symantic/Expr/Int.hs

   1 {-# LANGUAGE DefaultSignatures #-}
   2 {-# LANGUAGE FlexibleContexts #-}
   3 {-# LANGUAGE ScopedTypeVariables #-}
   4 {-# LANGUAGE TypeFamilies #-}
   5 {-# LANGUAGE TypeOperators #-}
   6 -- | Expression for 'Int'.
   7 module Language.Symantic.Expr.Int where
   8
   9 import Data.Proxy
  10 import qualified Data.Text as Text
  11
  12 import Language.Symantic.Type
  13 import Language.Symantic.Repr
  14 import Language.Symantic.Expr.Root
  15 import Language.Symantic.Expr.Error
  16 import Language.Symantic.Expr.From
  17 import Language.Symantic.Trans.Common
  18
  19 -- * Class 'Sym_Int'
  20 -- | Symantic.
  21 class Sym_Int repr where
  22         int :: Int -> repr Int
  23         default int :: Trans t repr => Int -> t repr Int
  24         int = trans_lift . int
  25 instance Sym_Int Repr_Host where
  26         int = Repr_Host
  27 instance Sym_Int Repr_Text where
  28         int a = Repr_Text $ \_p _v ->
  29                 Text.pack (show a)
  30 instance (Sym_Int r1, Sym_Int r2) => Sym_Int (Repr_Dup r1 r2) where
  31         int x = int x `Repr_Dup` int x
  32
  33 sym_Int :: Proxy Sym_Int
  34 sym_Int = Proxy
  35
  36 -- * Type 'Expr_Int'
  37 -- | Expression.
  38 data Expr_Int (root:: *)
  39 type instance Root_of_Expr      (Expr_Int root)      = root
  40 type instance Type_of_Expr      (Expr_Int root)      = Type_Int
  41 type instance Sym_of_Expr       (Expr_Int root) repr = Sym_Int repr
  42 type instance Error_of_Expr ast (Expr_Int root)      = No_Error_Expr