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 qualified Data.Text as Text
  10
  11 import Language.Symantic.Type
  12 import Language.Symantic.Repr
  13 import Language.Symantic.Expr.Root
  14 import Language.Symantic.Expr.Error
  15 import Language.Symantic.Expr.From
  16 import Language.Symantic.Trans.Common
  17
  18 -- * Class 'Sym_Int'
  19 -- | Symantic.
  20 class Sym_Int repr where
  21         int :: Int -> repr Int
  22         default int :: Trans t repr => Int -> t repr Int
  23         int = trans_lift . int
  24 instance Sym_Int Repr_Host where
  25         int = Repr_Host
  26 instance Sym_Int Repr_Text where
  27         int a = Repr_Text $ \_p _v ->
  28                 Text.pack (show a)
  29 instance (Sym_Int r1, Sym_Int r2) => Sym_Int (Repr_Dup r1 r2) where
  30         int x = int x `Repr_Dup` int x
  31
  32 -- * Type 'Expr_Int'
  33 -- | Expression.
  34 data Expr_Int (root:: *)
  35 type instance Root_of_Expr      (Expr_Int root)      = root
  36 type instance Type_of_Expr      (Expr_Int root)      = Type_Int
  37 type instance Sym_of_Expr       (Expr_Int root) repr = Sym_Int repr
  38 type instance Error_of_Expr ast (Expr_Int root)      = No_Error_Expr