@@ -1,88 +1,86 @@
1−{-# LANGUAGE DeriveDataTypeable, TypeFamilies, CPP #-}
1+{-# LANGUAGE CPP #-}
2+{-# LANGUAGE DeriveDataTypeable #-}
3+{-# LANGUAGE TypeFamilies #-}
4+{-# LANGUAGE ViewPatterns #-}
5+{-# LANGUAGE Unsafe #-}
6+{-# LANGUAGE DeriveLift #-}
7+{-# LANGUAGE StandaloneDeriving #-}
28{-# OPTIONS_HADDOCK hide #-}
39
410-- |
511-- Module : Data.UUID.Types.Internal
6−-- Copyright : (c) 2008-2009, 2012 Antoine Latter
12+-- Copyright : (c) 2017-2018 Herbert Valerio Riedel
13+-- (c) 2008-2009, 2012 Antoine Latter
714-- (c) 2009 Mark Lentczner
815--
916-- License : BSD-style
1017--
11−-- Maintainer : aslatter@gmail.com
12−-- Stability : experimental
18+-- Maintainer : hvr@gnu.org
1319-- Portability : portable
1420
1521module Data.UUID.Types.Internal
16− (UUID(..)
17− ,null
18− ,nil
19− ,fromByteString
20− ,toByteString
21− ,fromString
22− ,toString
23− ,fromText
24− ,toText
25− ,fromWords
26− ,toWords
27− ,toList
28− ,buildFromBytes
29− ,buildFromWords
30− ,fromASCIIBytes
31− ,toASCIIBytes
32− ,fromLazyASCIIBytes
33− ,toLazyASCIIBytes
34− ,UnpackedUUID(..)
35− ,pack
36− ,unpack
22+ ( UUID(..)
23+ , null
24+ , nil
25+ , fromByteString
26+ , toByteString
27+ , fromString
28+ , toString
29+ , fromText
30+ , toText
31+ , fromWords
32+ , toWords
33+ , fromWords64
34+ , toWords64
35+ , toList
36+ , buildFromBytes
37+ , buildFromWords
38+ , fromASCIIBytes
39+ , toASCIIBytes
40+ , fromLazyASCIIBytes
41+ , toLazyASCIIBytes
42+ , UnpackedUUID(..)
43+ , pack
44+ , unpack
3745 ) where
3846
39−import Prelude hiding (null)
40−
41−import Control.Applicative ((<*>))
42−import Control.DeepSeq (NFData(..))
43−import Control.Monad (liftM4, guard)
44−import Data.Functor ((<$>))
45−import Data.Char
46−import Data.Bits
47−import Data.Hashable
48−import Data.List (elemIndices)
49−import Foreign.Ptr (Ptr)
50−
51−#if MIN_VERSION_base(4,0,0)
52−import Data.Data
53−#else
54−import Data.Generics.Basics
55−#endif
56−
57−import Foreign.Storable
58−
59−import Data.Binary
60−import Data.Binary.Put
61−import Data.Binary.Get
62−import qualified Data.ByteString as B
63−import qualified Data.ByteString.Internal as BI
64−import qualified Data.ByteString.Lazy as BL
65−import qualified Data.ByteString.Unsafe as BU
66−import Data.Text (Text)
67−import qualified Data.Text as T
68−
69−import Data.UUID.Types.Internal.Builder
70−
71−import System.Random
72−
73−
74−-- |The UUID type. A 'Random' instance is provided which produces
75−-- version 4 UUIDs as specified in RFC 4122. The 'Storable' and
76−-- 'Binary' instances are compatible with RFC 4122, storing the fields
77−-- in network order as 16 bytes.
78−data UUID
79− = UUID
80− {-# UNPACK #-} !Word32
81− {-# UNPACK #-} !Word32
82− {-# UNPACK #-} !Word32
83− {-# UNPACK #-} !Word32
84− deriving (Eq, Ord, Typeable)
47+import Prelude hiding (null)
48+
49+import Control.DeepSeq (NFData (..))
50+import Control.Monad (guard, liftM2)
51+import Data.Bits
52+import Data.Char
53+import Data.Data
54+import Data.Hashable
55+import Data.List (elemIndices)
56+import Foreign.Ptr (Ptr)
57+
58+import Foreign.Storable
59+
60+import Data.Binary
61+import Data.Binary.Get
62+import Data.Binary.Put
63+import qualified Data.ByteString as B
64+import qualified Data.ByteString.Internal as BI
65+import qualified Data.ByteString.Lazy as BL
66+import qualified Data.ByteString.Unsafe as BU
67+import Data.Text (Text)
68+import qualified Data.Text.Encoding as T
69+
70+import Data.UUID.Types.Internal.Builder
71+
72+import System.Random (Random (..), uniform)
73+import System.Random.Stateful (Uniform (..), uniformWord64)
74+
75+import Language.Haskell.TH.Syntax (Lift)
76+
77+-- | Type representing <https://en.wikipedia.org/wiki/UUID Universally Unique Identifiers (UUID)> as specified in
78+-- <http://tools.ietf.org/html/rfc4122 RFC 4122>.
79+data UUID = UUID {-# UNPACK #-} !Word64 {-# UNPACK #-} !Word64
80+ deriving (Eq, Ord)
8581{-
82+ Prior to uuid-types-1.0.4:
83+ !Word32 !Word32 !Word32 !Word32
8684 Other representations that we tried are:
8785 Mimic V1 structure: !Word32 !Word16 !Word16 !Word16
8886 !Word8 !Word8 !Word8 !Word8 !Word8 !Word8
@@ -94,40 +92,75 @@ data UUID
9492 None was as fast, overall, as the representation used here.
9593-}
9694
97−-- | Covert a 'UUID' into a sequence of 'Word32' values.
95+-- | Convert a 'UUID' into a sequence of 'Word32' values.
9896-- Useful for when you need to serialize a UUID and
9997-- neither 'Storable' nor 'Binary' are appropriate.
100−-- Introduced in version 1.2.2.
98+--
99+-- >>> toWords <$> fromString "550e8400-e29b-41d4-a716-446655440000"
100+-- Just (1427014656,3801825748,2803254374,1430519808)
101+--
102+-- See also 'toWords64'.
103+--
104+-- /Since: @uuid-1.2.2@/
105+--
106+-- @since 1.0.0
101107toWords :: UUID -> (Word32, Word32, Word32, Word32)
102−toWords (UUID w1 w2 w3 w4) = (w1, w2, w3, w4)
108+toWords (UUID w12 w34) = (w1, w2, w3, w4)
109+ where
110+ w1 = fromIntegral (w12 `unsafeShiftR` 32)
111+ w2 = fromIntegral w12
112+ w3 = fromIntegral (w34 `unsafeShiftR` 32)
113+ w4 = fromIntegral w34
103114
104115-- | Create a 'UUID' from a sequence of 'Word32'. The
105−-- opposite of 'toWords'. Useful when you need a total
116+-- inverse of 'toWords'. Useful when you need a total
106117-- function for constructing 'UUID' values.
107−-- Introduced in version 1.2.2.
118+--
119+-- See also 'fromWords64'.
120+--
121+-- /Since: @uuid-1.2.2@/
122+--
123+-- @since 1.0.0
108124fromWords :: Word32 -> Word32 -> Word32 -> Word32 -> UUID
109−fromWords = UUID
125+fromWords w1 w2 w3 w4 = UUID (w32to64 w1 w2) (w32to64 w3 w4)
126+
127+-- | Convert a 'UUID' into a pair of 'Word64's.
128+--
129+-- >>> toWords64 <$> fromString "550e8400-e29b-41d4-a716-446655440000"
130+-- Just (6128981282234515924,12039885860129472512)
131+--
132+-- See also 'toWords'.
133+--
134+-- @since 1.0.4
135+toWords64 :: UUID -> (Word64, Word64)
136+toWords64 (UUID w12 w34) = (w12,w34)
137+
138+-- | Create a 'UUID' from a pair of 'Word64's.
139+--
140+-- Inverse of 'toWords64'. See also 'fromWords'.
141+--
142+-- @since 1.0.4
143+fromWords64 :: Word64 -> Word64 -> UUID
144+fromWords64 = UUID
110145
111146data UnpackedUUID =
112147 UnpackedUUID {
113− time_low :: Word32 -- 0-3
114− , time_mid :: Word16 -- 4-5
148+ time_low :: Word32 -- 0-3
149+ , time_mid :: Word16 -- 4-5
115150 , time_hi_and_version :: Word16 -- 6-7
116− , clock_seq_hi_res :: Word8 -- 8
117− , clock_seq_low :: Word8 -- 9
118− , node_0 :: Word8
119− , node_1 :: Word8
120− , node_2 :: Word8
121− , node_3 :: Word8
122− , node_4 :: Word8
123− , node_5 :: Word8
151+ , clock_seq_hi_res :: Word8 -- 8
152+ , clock_seq_low :: Word8 -- 9
153+ , node_0 :: Word8
154+ , node_1 :: Word8
155+ , node_2 :: Word8
156+ , node_3 :: Word8
157+ , node_4 :: Word8
158+ , node_5 :: Word8
124159 }
125160 deriving (Read, Show, Eq, Ord)
126161
127162unpack :: UUID -> UnpackedUUID
128−unpack (UUID w0 w1 w2 w3) =
129− build /-/ w0 /-/ w1 /-/ w2 /-/ w3
130−
163+unpack (UUID w0 w1) = build /-/ w0 /-/ w1
131164 where
132165 build x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF =
133166 UnpackedUUID {
@@ -162,23 +195,26 @@ pack unpacked =
162195
163196-- |Build a Word32 from four Word8 values, presented in big-endian order
164197word :: Word8 -> Word8 -> Word8 -> Word8 -> Word32
165−word a b c d = (fromIntegral a `shiftL` 24)
166− .|. (fromIntegral b `shiftL` 16)
167− .|. (fromIntegral c `shiftL` 8)
168− .|. (fromIntegral d )
198+word a b c d = (fromIntegral a `unsafeShiftL` 24)
199+ .|. (fromIntegral b `unsafeShiftL` 16)
200+ .|. (fromIntegral c `unsafeShiftL` 8)
201+ .|. (fromIntegral d )
169202
170−-- |Extract a Word8 from a Word32. Bytes, high to low, are numbered from 3 to 0,
171−byte :: Int -> Word32 -> Word8
203+-- |Extract a Word8 from a Word64. Bytes, high to low, are numbered from 7 to 0,
204+byte :: Int -> Word64 -> Word8
172205byte i w = fromIntegral (w `shiftR` (i * 8))
173206
174207-- |Build a Word16 from two Word8 values, presented in big-endian order.
175208w8to16 :: Word8 -> Word8 -> Word16
176209w8to16 w0s w1s =
177− (w0 `shiftL` 8) .|. w1
210+ (w0 `unsafeShiftL` 8) .|. w1
178211 where
179212 w0 = fromIntegral w0s
180213 w1 = fromIntegral w1s
181214
215+-- | Construct 'Word64' from low/high 'Word32's
216+w32to64 :: Word32 -> Word32 -> Word64
217+w32to64 w0 w1 = (fromIntegral w0 `unsafeShiftL` 32) .|. (fromIntegral w1)
182218
183219-- |Make a UUID from sixteen Word8 values
184220makeFromBytes :: Word8 -> Word8 -> Word8 -> Word8
@@ -187,16 +223,12 @@ makeFromBytes :: Word8 -> Word8 -> Word8 -> Word8
187223 -> Word8 -> Word8 -> Word8 -> Word8
188224 -> UUID
189225makeFromBytes b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf
190− = UUID w0 w1 w2 w3
226+ = fromWords w0 w1 w2 w3
191227 where w0 = word b0 b1 b2 b3
192228 w1 = word b4 b5 b6 b7
193229 w2 = word b8 b9 ba bb
194230 w3 = word bc bd be bf
195231
196−-- |Make a UUID from four Word32 values
197−makeFromWords :: Word32 -> Word32 -> Word32 -> Word32 -> UUID
198−makeFromWords = UUID
199−
200232-- |A Builder for constructing a UUID of a given version.
201233buildFromBytes :: Word8
202234 -> Word8 -> Word8 -> Word8 -> Word8
@@ -209,20 +241,20 @@ buildFromBytes v b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf =
209241 where b6' = b6 .&. 0x0f .|. (v `shiftL` 4)
210242 b8' = b8 .&. 0x3f .|. 0x80
211243
212−-- |Build a UUID of a given version from Word32 values.
244+-- |Build a UUID of a given version from 'Word32' values.
213245buildFromWords :: Word8 -> Word32 -> Word32 -> Word32 -> Word32 -> UUID
214−buildFromWords v w0 w1 w2 w3 = makeFromWords w0 w1' w2' w3
246+buildFromWords v w0 w1 w2 w3 = fromWords w0 w1' w2' w3
215247 where w1' = w1 .&. 0xffff0fff .|. ((fromIntegral v) `shiftL` 12)
216248 w2' = w2 .&. 0x3fffffff .|. 0x80000000
217249
218250
219251-- |Return the bytes that make up the UUID
220252toList :: UUID -> [Word8]
221−toList (UUID w0 w1 w2 w3) =
222− [byte 3 w0, byte 2 w0, byte 1 w0, byte 0 w0,
223− byte 3 w1, byte 2 w1, byte 1 w1, byte 0 w1,
224− byte 3 w2, byte 2 w2, byte 1 w2, byte 0 w2,
225− byte 3 w3, byte 2 w3, byte 1 w3, byte 0 w3]
253+toList (UUID w0 w1) =
254+ [byte 7 w0, byte 6 w0, byte 5 w0, byte 4 w0,
255+ byte 3 w0, byte 2 w0, byte 1 w0, byte 0 w0,
256+ byte 7 w1, byte 6 w1, byte 5 w1, byte 4 w1,
257+ byte 3 w1, byte 2 w1, byte 1 w1, byte 0 w1]
226258
227259-- |Construct a UUID from a list of Word8. Returns Nothing if the list isn't
228260-- exactly sixteen bytes long
@@ -243,10 +275,10 @@ null = (== nil)
243275 -- null (UUID 0 0 0 0) = True
244276 -- null _ = False
245277
246−-- |The nil UUID, as defined in RFC 4122.
247−-- It is a UUID of all zeros. @'null' u@ iff @'u' == 'nil'@.
278+-- |The 'nil' UUID, as defined in <http://tools.ietf.org/html/rfc4122 RFC 4122>.
279+-- It is a UUID of all zeros. @'null' u@ /iff/ @'u' == 'nil'@.
248280nil :: UUID
249−nil = UUID 0 0 0 0
281+nil = UUID 0 0
250282
251283-- |Extract a UUID from a 'ByteString' in network byte order.
252284-- The argument must be 16 bytes long, otherwise 'Nothing' is returned.
@@ -254,6 +286,8 @@ fromByteString :: BL.ByteString -> Maybe UUID
254286fromByteString = fromList . BL.unpack
255287
256288-- |Encode a UUID into a 'ByteString' in network order.
289+--
290+-- This uses the same encoding as the 'Binary' instance.
257291toByteString :: UUID -> BL.ByteString
258292toByteString = BL.pack . toList
259293
@@ -261,9 +295,8 @@ toByteString = BL.pack . toList
261295-- The hyphens may not be omitted.
262296-- Example:
263297--
264−-- @
265−-- fromString \"c2cc10e1-57d6-4b6f-9899-38d972112d8c\"
266−-- @
298+-- >>> fromString "c2cc10e1-57d6-4b6f-9899-38d972112d8c"
299+-- Just c2cc10e1-57d6-4b6f-9899-38d972112d8c
267300--
268301-- Hex digits may be upper or lower-case.
269302fromString :: String -> Maybe UUID
@@ -278,7 +311,7 @@ fromString' s0 = do
278311 (w2, s3) <- hexWord s2
279312 (w3, s4) <- hexWord s3
280313 if s4 /= "" then Nothing
281− else Just $ UUID w0 w1 w2 w3
314+ else Just $ fromWords w0 w1 w2 w3
282315 where hexWord :: String -> Maybe (Word32, String)
283316 hexWord s = Just (0, s) >>= hexByte >>= hexByte
284317 >>= hexByte >>= hexByte
@@ -295,30 +328,39 @@ fromString' s0 = do
295328-- | Convert a UUID into a hypenated string using lower-case letters.
296329-- Example:
297330--
298−-- @
299−-- toString \<$\> fromString \"550e8400-e29b-41d4-a716-446655440000\"
300−-- @
331+-- >>> toString <$> fromString "550e8400-e29b-41d4-a716-446655440000"
332+-- Just "550e8400-e29b-41d4-a716-446655440000"
333+--
334+--
301335toString :: UUID -> String
302−toString (UUID w0 w1 w2 w3) = hexw w0 $ hexw' w1 $ hexw' w2 $ hexw w3 ""
303− where hexw :: Word32 -> String -> String
304− hexw w s = hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
305− : hexn w 12 : hexn w 8 : hexn w 4 : hexn w 0 : s
306−
307− hexw' :: Word32 -> String -> String
308− hexw' w s = '-' : hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
309− : '-' : hexn w 12 : hexn w 8 : hexn w 4 : hexn w 0 : s
310−
311− hexn :: Word32 -> Int -> Char
336+toString uuid = hexw0 w0 $ hexw1 w1 ""
337+ where hexw0 :: Word64 -> String -> String
338+ hexw0 w s = hexn w 60 : hexn w 56 : hexn w 52 : hexn w 48
339+ : hexn w 44 : hexn w 40 : hexn w 36 : hexn w 32
340+ : '-' : hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
341+ : '-' : hexn w 12 : hexn w 8 : hexn w 4 : hexn w 0
342+ : s
343+
344+ hexw1 :: Word64 -> String -> String
345+ hexw1 w s = '-' : hexn w 60 : hexn w 56 : hexn w 52 : hexn w 48
346+ : '-' : hexn w 44 : hexn w 40 : hexn w 36 : hexn w 32
347+ : hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
348+ : hexn w 12 : hexn w 8 : hexn w 4 : hexn w 0
349+ : s
350+
351+ hexn :: Word64 -> Int -> Char
312352 hexn w r = intToDigit $ fromIntegral ((w `shiftR` r) .&. 0xf)
313353
354+ (w0,w1) = toWords64 uuid
355+
314356-- | If the passed in `Text` can be parsed as an ASCII representation of
315357-- a `UUID`, it will be. The hyphens may not be omitted.
316358fromText :: Text -> Maybe UUID
317−fromText = fromString . T.unpack
359+fromText = fromASCIIBytes . T.encodeUtf8
318360
319361-- | Convert a UUID into a hyphentated string using lower-case letters.
320362toText :: UUID -> Text
321−toText = T.pack . toString
363+toText = T.decodeLatin1 . toASCIIBytes
322364
323365-- | Convert a UUID into a hyphentated string using lower-case letters, packed
324366-- as ASCII bytes into `B.ByteString`.
@@ -413,49 +455,30 @@ fromASCIIBytes bs = do
413455-- | Similar to `toASCIIBytes` except we produce a lazy `BL.ByteString`.
414456toLazyASCIIBytes :: UUID -> BL.ByteString
415457toLazyASCIIBytes =
416−#if MIN_VERSION_bytestring(0,10,0)
417458 BL.fromStrict
418−#else
419− BL.fromChunks . return
420−#endif
421459 . toASCIIBytes
422460
423461-- | Similar to `fromASCIIBytes` except parses from a lazy `BL.ByteString`.
424462fromLazyASCIIBytes :: BL.ByteString -> Maybe UUID
425463fromLazyASCIIBytes bs =
426− if BL.length bs == 36 then fromASCIIBytes (
427−#if MIN_VERSION_bytestring(0,10,0)
428− BL.toStrict bs
429−#else
430− B.concat $ BL.toChunks bs
431−#endif
432− ) else Nothing
464+ if BL.length bs == 36 then fromASCIIBytes (BL.toStrict bs) else Nothing
433465
434466--
435467-- Class Instances
436468--
437469
470+-- | This 'Random' instance produces __insecure__ version 4 UUIDs as
471+-- specified in <http://tools.ietf.org/html/rfc4122 RFC 4122>.
438472instance Random UUID where
439− random g = (fromGenNext w0 w1 w2 w3 w4, g4)
440− where (w0, g0) = next g
441− (w1, g1) = next g0
442− (w2, g2) = next g1
443− (w3, g3) = next g2
444− (w4, g4) = next g3
473+ random = uniform
445474 randomR _ = random -- range is ignored
446475
447−-- |Build a UUID from the results of five calls to next on a StdGen.
448−-- While next on StdGet returns an Int, it doesn't provide 32 bits of
449−-- randomness. This code relies on at last 28 bits of randomness in the
450−-- and optimizes its use so as to make only five random values, not six.
451−fromGenNext :: Int -> Int -> Int -> Int -> Int -> UUID
452−fromGenNext w0 w1 w2 w3 w4 =
453− buildFromBytes 4 /-/ (ThreeByte w0)
454− /-/ (ThreeByte w1)
455− /-/ w2 -- use all 4 bytes because we know the version
456− -- field will "cover" the upper, non-random bits
457− /-/ (ThreeByte w3)
458− /-/ (ThreeByte w4)
476+-- @since 1.0.4
477+instance Uniform UUID where
478+ uniformM gen = do
479+ w0 <- uniformWord64 gen
480+ w1 <- uniformWord64 gen
481+ pure $ buildFromBytes 4 /-/ w0 /-/ w1
459482
460483-- |A ByteSource to extract only three bytes from an Int, since next on StdGet
461484-- only returns 31 bits of randomness.
@@ -463,24 +486,29 @@ type instance ByteSink ThreeByte g = Takes3Bytes g
463486newtype ThreeByte = ThreeByte Int
464487instance ByteSource ThreeByte where
465488 f /-/ (ThreeByte w) = f b1 b2 b3
466− where b1 = fromIntegral (w `shiftR` 16)
467− b2 = fromIntegral (w `shiftR` 8)
489+ where b1 = fromIntegral (w `unsafeShiftR` 16)
490+ b2 = fromIntegral (w `unsafeShiftR` 8)
468491 b3 = fromIntegral w
469492
470493instance NFData UUID where
471− rnf = rnf . toWords
494+ rnf = flip seq ()
472495
473496instance Hashable UUID where
474− hash (UUID w0 w1 w2 w3) =
497+ hash (toWords -> (w0,w1,w2,w3)) =
475498 hash w0 `hashWithSalt` w1
476499 `hashWithSalt` w2
477500 `hashWithSalt` w3
478− hashWithSalt s (UUID w0 w1 w2 w3) =
501+ hashWithSalt s (toWords -> (w0,w1,w2,w3)) =
479502 s `hashWithSalt` w0
480503 `hashWithSalt` w1
481504 `hashWithSalt` w2
482505 `hashWithSalt` w3
483506
507+-- | Pretty prints a 'UUID' (without quotation marks). See also 'toString'.
508+--
509+-- >>> show nil
510+-- "00000000-0000-0000-0000-000000000000"
511+--
484512instance Show UUID where
485513 show = toString
486514
@@ -491,7 +519,7 @@ instance Read UUID where
491519 Nothing -> []
492520 Just u -> [(u,drop 36 noSpaces)]
493521
494−
522+-- | This 'Storable' instance uses the memory layout as described in <http://tools.ietf.org/html/rfc4122 RFC 4122>, but in contrast to the 'Binary' instance, __the fields are stored in host byte order__.
495523instance Storable UUID where
496524 sizeOf _ = 16
497525 alignment _ = 4
@@ -528,10 +556,10 @@ instance Storable UUID where
528556 pokeByteOff p (off+14) x9
529557 pokeByteOff p (off+15) x10
530558
559+-- | This 'Binary' instance is compatible with <http://tools.ietf.org/html/rfc4122 RFC 4122>, storing the fields in network order as 16 bytes.
531560instance Binary UUID where
532− put (UUID w0 w1 w2 w3) =
533− putWord32be w0 >> putWord32be w1 >> putWord32be w2 >> putWord32be w3
534− get = liftM4 UUID getWord32be getWord32be getWord32be getWord32be
561+ put (UUID w0 w1) = putWord64be w0 >> putWord64be w1
562+ get = liftM2 UUID getWord64be getWord64be
535563
536564
537565-- My goal with this instance was to make it work just enough to do what
@@ -544,7 +572,4 @@ instance Data UUID where
544572uuidType :: DataType
545573uuidType = mkNoRepType "Data.UUID.Types.UUID"
546574
547−#if !(MIN_VERSION_base(4,2,0))
548−mkNoRepType :: String -> DataType
549−mkNoRepType = mkNorepType
550−#endif
575+deriving instance Lift UUID