luau/prototyping/FFI/Data/Aeson.agda
Alan Jeffrey 041838a942
Prototyping a small subset of Luau in Agda (#350)
* First cut reading JSON into an Agda representation of Luau syntax
2022-02-08 18:26:58 -06:00

50 lines
1.7 KiB
Agda

module FFI.Data.Aeson where
open import Agda.Builtin.Bool using (Bool)
open import Agda.Builtin.String using (String)
open import FFI.Data.ByteString using (ByteString)
open import FFI.Data.HaskellString using (HaskellString; pack)
open import FFI.Data.Maybe using (Maybe)
open import FFI.Data.Either using (Either; mapLeft)
open import FFI.Data.Scientific using (Scientific)
open import FFI.Data.Vector using (Vector)
{-# FOREIGN GHC import qualified Data.Aeson #-}
{-# FOREIGN GHC import qualified Data.Aeson.Key #-}
{-# FOREIGN GHC import qualified Data.Aeson.KeyMap #-}
postulate
KeyMap : Set Set
Key : Set
fromString : String Key
toString : Key String
lookup : {A} Key -> KeyMap A -> Maybe A
{-# POLARITY KeyMap ++ #-}
{-# COMPILE GHC KeyMap = type Data.Aeson.KeyMap.KeyMap #-}
{-# COMPILE GHC Key = type Data.Aeson.Key.Key #-}
{-# COMPILE GHC fromString = Data.Aeson.Key.fromText #-}
{-# COMPILE GHC toString = Data.Aeson.Key.toText #-}
{-# COMPILE GHC lookup = \_ -> Data.Aeson.KeyMap.lookup #-}
data Value : Set where
object : KeyMap Value Value
array : Vector Value Value
string : String Value
number : Scientific Value
bool : Bool Value
null : Value
{-# COMPILE GHC Value = data Data.Aeson.Value (Data.Aeson.Object|Data.Aeson.Array|Data.Aeson.String|Data.Aeson.Number|Data.Aeson.Bool|Data.Aeson.Null) #-}
Object = KeyMap Value
Array = Vector Value
postulate
decode : ByteString Maybe Value
eitherHDecode : ByteString Either HaskellString Value
{-# COMPILE GHC decode = Data.Aeson.decodeStrict #-}
{-# COMPILE GHC eitherHDecode = Data.Aeson.eitherDecodeStrict #-}
eitherDecode : ByteString Either String Value
eitherDecode bytes = mapLeft pack (eitherHDecode bytes)