Language/Symantic/Type/Bool.hs

   1 {-# LANGUAGE FlexibleContexts #-}
   2 {-# LANGUAGE GADTs #-}
   3 {-# LANGUAGE MultiParamTypeClasses #-}
   4 {-# LANGUAGE OverloadedStrings #-}
   5 {-# LANGUAGE ScopedTypeVariables #-}
   6 {-# LANGUAGE TypeFamilies #-}
   7 {-# LANGUAGE TypeOperators #-}
   8 {-# OPTIONS_GHC -fno-warn-missing-methods #-}
   9 module Language.Symantic.Type.Bool where
  10
  11 import Data.Maybe (isJust)
  12 import Data.Type.Equality ((:~:)(Refl))
  13
  14 import Language.Symantic.Type.Common
  15
  16 -- * Type 'Type_Bool'
  17 -- | The 'Bool' type.
  18 data Type_Bool (root:: * -> *) h where
  19         Type_Bool :: Type_Bool root Bool
  20 type instance Root_of_Type      (Type_Bool root) = root
  21 type instance Error_of_Type ast (Type_Bool root) = No_Error_Type
  22
  23 instance -- Eq_Type
  24  Eq_Type (Type_Bool root) where
  25         eq_type Type_Bool Type_Bool = Just Refl
  26 instance -- Eq
  27  Eq (Type_Bool root h) where
  28         x == y = isJust $ x `eq_type` y
  29 instance -- String_from_Type
  30  String_from_Type (Type_Bool root) where
  31         string_from_type Type_Bool = "Bool"
  32 instance -- Show
  33  Show (Type_Bool root h) where
  34         show = string_from_type
  35 instance Constraint_Type Eq (Type_Bool root) where
  36         constraint_type _c Type_Bool = Just Dict
  37 instance Constraint_Type Ord (Type_Bool root) where
  38         constraint_type _c Type_Bool = Just Dict
  39 instance Unlift_Type1 Type_Bool
  40 instance Eq_Type1 (Type_Bool root)
  41
  42 -- | Convenient alias to include a 'Type_Bool' within a type.
  43 type_bool :: Type_Root_Lift Type_Bool root => root Bool
  44 type_bool = type_root_lift Type_Bool