| Line No. | Rev | Author | Line |
|---|---|---|---|
| 1 | 1 | paulosilva | |
| 2 | 1 | paulosilva | {-# LANGUAGE GADTs, TypeOperators, EmptyDataDecls, TypeSynonymInstances #-} |
| 3 | 1 | paulosilva | {-# OPTIONS_GHC -Wall #-} |
| 4 | 1 | paulosilva | |
| 5 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 6 | 1 | paulosilva | |
| 7 | 1 | paulosilva | {- | |
| 8 | 1 | paulosilva | Module : Language.Type.Syntax |
| 9 | 1 | paulosilva | Description : Polymorphic type representation of the types used by Galculator. |
| 10 | 1 | paulosilva | Copyright : (c) Paulo Silva |
| 11 | 1 | paulosilva | License : LGPL |
| 12 | 1 | paulosilva | |
| 13 | 1 | paulosilva | Maintainer : paufil@di.uminho.pt |
| 14 | 1 | paulosilva | Stability : experimental |
| 15 | 1 | paulosilva | Portability : portable |
| 16 | 1 | paulosilva | |
| 17 | 1 | paulosilva | -} |
| 18 | 1 | paulosilva | |
| 19 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 20 | 1 | paulosilva | |
| 21 | 1 | paulosilva | module Language.Type.Syntax ( |
| 22 | 1 | paulosilva | Type(..), |
| 23 | 1 | paulosilva | (:<->:), |
| 24 | 1 | paulosilva | (:<-:), |
| 25 | 1 | paulosilva | PO, |
| 26 | 1 | paulosilva | Var, |
| 27 | 1 | paulosilva | GC, |
| 28 | 1 | paulosilva | One, |
| 29 | 1 | paulosilva | Name, |
| 30 | 1 | paulosilva | TypeBox |
| 31 | 1 | paulosilva | ) where |
| 32 | 1 | paulosilva | |
| 33 | 1 | paulosilva | import Data.Existential |
| 34 | 1 | paulosilva | import Data.Map |
| 35 | 1 | paulosilva | import Data.Set |
| 36 | 1 | paulosilva | import Language.Type.Equality |
| 37 | 1 | paulosilva | import Language.Type.Pretty |
| 38 | 1 | paulosilva | |
| 39 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 40 | 1 | paulosilva | |
| 41 | 1 | paulosilva | type One = () |
| 42 | 1 | paulosilva | type Name = String |
| 43 | 1 | paulosilva | |
| 44 | 1 | paulosilva | type b :<-: a = a -> b |
| 45 | 1 | paulosilva | data b :<->: a |
| 46 | 1 | paulosilva | |
| 47 | 1 | paulosilva | data GC b a |
| 48 | 1 | paulosilva | data PO a |
| 49 | 1 | paulosilva | data Var |
| 50 | 1 | paulosilva | |
| 51 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 52 | 1 | paulosilva | |
| 53 | 1 | paulosilva | data Type a where |
| 54 | 1 | paulosilva | TVar :: Name -> Type Var |
| 55 | 1 | paulosilva | |
| 56 | 1 | paulosilva | One :: Type One |
| 57 | 1 | paulosilva | Bool :: Type Bool |
| 58 | 1 | paulosilva | Char :: Type Char |
| 59 | 1 | paulosilva | String :: Type String |
| 60 | 1 | paulosilva | Int :: Type Int |
| 61 | 1 | paulosilva | Float :: Type Float |
| 62 | 1 | paulosilva | |
| 63 | 1 | paulosilva | Prod :: Type a -> Type b -> Type (a,b) |
| 64 | 1 | paulosilva | Either :: Type a -> Type b -> Type (Either a b) |
| 65 | 1 | paulosilva | |
| 66 | 1 | paulosilva | Maybe :: Type a -> Type (Maybe a) |
| 67 | 1 | paulosilva | List :: Type a -> Type [a] |
| 68 | 1 | paulosilva | Set :: Type a -> Type (Set a) |
| 69 | 1 | paulosilva | Map :: Type a -> Type b -> Type (Map a b) |
| 70 | 1 | paulosilva | |
| 71 | 1 | paulosilva | Fun :: Type b -> Type a -> Type (b :<-: a) |
| 72 | 1 | paulosilva | Rel :: Type b -> Type a -> Type (b :<->: a) |
| 73 | 1 | paulosilva | Ord :: Type a -> Type (PO a) |
| 74 | 1 | paulosilva | |
| 75 | 1 | paulosilva | GC :: Type b -> Type a -> Type (GC b a) |
| 76 | 1 | paulosilva | |
| 77 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 78 | 1 | paulosilva | |
| 79 | 1 | paulosilva | instance Show (Type t) where |
| 80 | 1 | paulosilva | showsPrec _ = showType |
| 81 | 1 | paulosilva | |
| 82 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 83 | 1 | paulosilva | |
| 84 | 1 | paulosilva | instance Eq (Type a) where |
| 85 | 1 | paulosilva | t1 == t2 = beq t1 t2 |
| 86 | 1 | paulosilva | |
| 87 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 88 | 1 | paulosilva | |
| 89 | 1 | paulosilva | type TypeBox = Covert Type |
| 90 | 1 | paulosilva | |
| 91 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 92 | 1 | paulosilva | |
| 93 | 1 | paulosilva | instance Eq TypeBox where |
| 94 | 1 | paulosilva | (Hide t) == (Hide t') = beq t t' |
| 95 | 1 | paulosilva | |
| 96 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 97 | 1 | paulosilva | |
| 98 | 1 | paulosilva | instance Show TypeBox where |
| 99 | 1 | paulosilva | show (Hide a) = show a |
| 100 | 1 | paulosilva | |
| 101 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 102 | 1 | paulosilva |