Commit 8d8bac9ea5f82a6961fdfde13bfc3f17352a05f6 - eben

Included a better API for converting to/from Eben Getty Ritter 8 years ago

1 changed file(s) with 42 addition(s) and 0 deletion(s). Collapse all Expand all

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Data/Eben.hs less more

1	1	{-# LANGUAGE OverloadedStrings #-}
2	2	{-# LANGUAGE ViewPatterns #-}
	3	{-# LANGUAGE FlexibleInstances #-}
3	4
4	5	module Data.Eben where
5	6

58	59	(str, rs'') = BS.splitAt len (BS.tail rs')
59	60	in Just (BS.toStrict str, rs'')
60	61
	62	class FromEben t where
	63	fromEben :: Value -> Maybe t
	64
	65	instance FromEben Float where
	66	fromEben (Float f) = Just f
	67	fromEben (Integer i) = Just (fromIntegral i)
	68	fromEben _ = Nothing
	69
	70	instance FromEben Int where
	71	fromEben (Integer i) = Just (fromIntegral i)
	72	fromEben _ = Nothing
	73
	74	instance FromEben a => FromEben [a] where
	75	fromEben (List ls) = mapM fromEben ls
	76	fromEben _ = Nothing
	77
	78	instance (FromEben a, FromEben b) => FromEben (a, b) where
	79	fromEben (List [x,y]) = (,) <$> fromEben x <*> fromEben y
	80	fromEben _ = Nothing
	81
61	82	asDict :: Value -> Maybe (Map B.ByteString Value)
62	83	asDict (Dict ds) = Just ds
63	84	asDict _ = Nothing

86	107	toNum (n * 10 + toDigit b) bs
87	108	toNum n _ = n
88	109
	110	class ToEben t where
	111	toEben :: t -> Value
	112
	113	instance ToEben a => ToEben [a] where
	114	toEben = List . map toEben
	115
	116	instance ToEben Float where
	117	toEben = Float
	118
	119	instance ToEben Int where
	120	toEben = Integer . fromIntegral
	121
	122	instance ToEben Integer where
	123	toEben = Integer . fromIntegral
	124
	125	instance (ToEben l, ToEben r) => ToEben (l, r) where
	126	toEben (x, y) = List [ toEben x, toEben y ]
	127
	128	dict :: [(B.ByteString, Value)] -> Value
	129	dict = Dict . M.fromList
	130
89	131	encode :: Value -> ByteString
90	132	encode = BL.toLazyByteString . go
91	133	where go (List vs) =