@@ -3,9 +3,6 @@
33#if __GLASGOW_HASKELL__ >= 702
44{-# LANGUAGE Trustworthy #-}
55#endif
6−#if __GLASGOW_HASKELL__ >= 708
7−{-# LANGUAGE TypeFamilies #-}
8−#endif
96
107-- |
118-- Module : Data.Text
@@ -32,8 +29,8 @@
3229--
3330-- To use an extended and very rich family of functions for working
3431-- with Unicode text (including normalization, regular expressions,
35−-- non-standard encodings, text breaking, and locales), see
36−-- <http://hackage.haskell.org/package/text-icu the text-icu package >.
32+-- non-standard encodings, text breaking, and locales), see the
33+-- @text-icu@ package: <http://hackage.haskell.org/package/text-icu>
3734
3835module Data.Text
3936 (
@@ -129,7 +126,6 @@ module Data.Text
129126 , drop
130127 , dropEnd
131128 , takeWhile
132− , takeWhileEnd
133129 , dropWhile
134130 , dropWhileEnd
135131 , dropAround
@@ -192,40 +188,32 @@ module Data.Text
192188
193189 -- * Low level operations
194190 , copy
195− , unpackCString#
196191 ) where
197192
198193import Prelude (Char, Bool(..), Int, Maybe(..), String,
199194 Eq(..), Ord(..), Ordering(..), (++),
200− Read(..),
201− (&&), (||), (+), (-), (.), ($), ($!), (>>),
202− not, return, otherwise, quot)
195+ Read(..), Show(..),
196+ (&&), (||), (+), (-), (.), ($), ($!), (>>), (*),
197+ maxBound, not, return, otherwise, quot)
203198#if defined(HAVE_DEEPSEQ)
204−import Control.DeepSeq (NFData(rnf))
199+import Control.DeepSeq (NFData)
205200#endif
206201#if defined(ASSERTS)
207202import Control.Exception (assert)
208203#endif
209204import Data.Char (isSpace)
210−import Data.Data (Data(gfoldl, toConstr, gunfold, dataTypeOf), constrIndex,
211− Constr, mkConstr, DataType, mkDataType, Fixity(Prefix))
205+import Data.Data (Data(gfoldl, toConstr, gunfold, dataTypeOf))
206+import Data.Data (mkNoRepType)
212207import Control.Monad (foldM)
213−import Control.Monad.ST (ST)
214208import qualified Data.Text.Array as A
215209import qualified Data.List as L
216−import Data.Binary (Binary(get, put))
217210import Data.Monoid (Monoid(..))
218−#if MIN_VERSION_base(4,9,0)
219−import Data.Semigroup (Semigroup(..))
220−#endif
221211import Data.String (IsString(..))
222212import qualified Data.Text.Internal.Fusion as S
223213import qualified Data.Text.Internal.Fusion.Common as S
224−import Data.Text.Encoding (decodeUtf8', encodeUtf8)
225214import Data.Text.Internal.Fusion (stream, reverseStream, unstream)
226215import Data.Text.Internal.Private (span_)
227−import Data.Text.Internal (Text(..), empty, firstf, mul, safe, text)
228−import Data.Text.Show (singleton, unpack, unpackCString#)
216+import Data.Text.Internal (Text(..), empty, firstf, safe, text)
229217import qualified Prelude as P
230218import Data.Text.Unsafe (Iter(..), iter, iter_, lengthWord16, reverseIter,
231219 reverseIter_, unsafeHead, unsafeTail)
@@ -238,13 +226,12 @@ import Data.ByteString (ByteString)
238226import qualified Data.Text.Lazy as L
239227import Data.Int (Int64)
240228#endif
241−import GHC.Base (eqInt, neInt, gtInt, geInt, ltInt, leInt)
242−#if __GLASGOW_HASKELL__ >= 708
243−import qualified GHC.Exts as Exts
244−#endif
245−#if MIN_VERSION_base(4,7,0)
246−import Text.Printf (PrintfArg, formatArg, formatString)
229+#if __GLASGOW_HASKELL__ >= 702
230+import qualified GHC.CString as GHC
231+#else
232+import qualified GHC.Base as GHC
247233#endif
234+import GHC.Prim (Addr#)
248235
249236-- $strict
250237--
@@ -254,32 +241,29 @@ import Text.Printf (PrintfArg, formatArg, formatString)
254241-- lazy @Text@ type consists of a list of strict chunks.
255242--
256243-- The strict 'Text' type requires that an entire string fit into
257−-- memory at once. The lazy 'Data.Text.Lazy.Text' type is capable of
258−-- streaming strings that are larger than memory using a small memory
259−-- footprint. In many cases, the overhead of chunked streaming makes
260−-- the lazy 'Data.Text.Lazy.Text' type slower than its strict
261−-- counterpart, but this is not always the case. Sometimes, the time
262−-- complexity of a function in one module may be different from the
263−-- other, due to their differing internal structures.
244+-- memory at once. The lazy @Text@ type is capable of streaming
245+-- strings that are larger than memory using a small memory footprint.
246+-- In many cases, the overhead of chunked streaming makes the lazy
247+-- @Text@ type slower than its strict counterpart, but this is not
248+-- always the case. Sometimes, the time complexity of a function in
249+-- one module may be different from the other, due to their differing
250+-- internal structures.
264251--
265252-- Each module provides an almost identical API, with the main
266253-- difference being that the strict module uses 'Int' values for
267−-- lengths and counts, while the lazy module uses 'Data.Int.Int64'
268−-- lengths.
254+-- lengths and counts, while the lazy module uses 'Int64' lengths.
269255
270256-- $replacement
271257--
272258-- A 'Text' value is a sequence of Unicode scalar values, as defined
273−-- in
274−-- <http://www.unicode.org/versions/Unicode5.2.0/ch03.pdf#page=35 §3.9, definition D76 of the Unicode 5.2 standard >.
275−-- As such, a 'Text' cannot contain values in the range U+D800 to
276−-- U+DFFF inclusive. Haskell implementations admit all Unicode code
277−-- points
278−-- (<http://www.unicode.org/versions/Unicode5.2.0/ch03.pdf#page=13 §3.4, definition D10 >)
279−-- as 'Char' values, including code points from this invalid range.
280−-- This means that there are some 'Char' values that are not valid
281−-- Unicode scalar values, and the functions in this module must handle
282−-- those cases.
259+-- in §3.9, definition D76 of the Unicode 5.2 standard:
260+-- <http://www.unicode.org/versions/Unicode5.2.0/ch03.pdf#page=35>. As
261+-- such, a 'Text' cannot contain values in the range U+D800 to U+DFFF
262+-- inclusive. Haskell implementations admit all Unicode code points
263+-- (§3.4, definition D10) as 'Char' values, including code points
264+-- from this invalid range. This means that there are some 'Char'
265+-- values that are not valid Unicode scalar values, and the functions
266+-- in this module must handle those cases.
283267--
284268-- Within this module, many functions construct a 'Text' from one or
285269-- more 'Char' values. Those functions will substitute 'Char' values
@@ -293,8 +277,8 @@ import Text.Printf (PrintfArg, formatArg, formatString)
293277-- range U+D800 through U+DFFF are used by UTF-16 to denote surrogate
294278-- code points, and so cannot be represented. The functions replace
295279-- invalid scalar values, instead of dropping them, as a security
296−-- measure. For details, see
297−-- <http://unicode.org/reports/tr36/#Deletion_of_Noncharacters Unicode Technical Report 36, §3.5 >.)
280+-- measure. For details, see Unicode Technical Report 36, §3.5:
281+-- <http://unicode.org/reports/tr36/#Deletion_of_Noncharacters>)
298282
299283-- $fusion
300284--
@@ -312,11 +296,11 @@ import Text.Printf (PrintfArg, formatArg, formatString)
312296-- > countChars = T.length . T.toUpper . E.decodeUtf8
313297--
314298-- From the type signatures involved, this looks like it should
315−-- allocate one 'Data.ByteString.ByteString' value, and two 'Text'
316−-- values. However, when a module is compiled with optimisation
317−-- enabled under GHC, the two intermediate 'Text' values will be
318−-- optimised away, and the function will be compiled down to a single
319−-- loop over the source 'Data.ByteString.ByteString'.
299+-- allocate one 'ByteString' value, and two 'Text' values. However,
300+-- when a module is compiled with optimisation enabled under GHC, the
301+-- two intermediate 'Text' values will be optimised away, and the
302+-- function will be compiled down to a single loop over the source
303+-- 'ByteString'.
320304--
321305-- Functions that can be fused by the compiler are documented with the
322306-- phrase \"Subject to fusion\".
@@ -330,82 +314,41 @@ instance Eq Text where
330314instance Ord Text where
331315 compare = compareText
332316
317+instance Show Text where
318+ showsPrec p ps r = showsPrec p (unpack ps) r
319+
333320instance Read Text where
334321 readsPrec p str = [(pack x,y) | (x,y) <- readsPrec p str]
335322
336−#if MIN_VERSION_base(4,9,0)
337−-- Semigroup orphan instances for older GHCs are provided by
338−-- 'semigroups` package
339−
340−instance Semigroup Text where
341− (<>) = append
342−#endif
343−
344323instance Monoid Text where
345324 mempty = empty
346−#if MIN_VERSION_base(4,9,0)
347− mappend = (<>) -- future-proof definition
348−#else
349325 mappend = append
350−#endif
351326 mconcat = concat
352327
353328instance IsString Text where
354329 fromString = pack
355330
356−#if __GLASGOW_HASKELL__ >= 708
357−instance Exts.IsList Text where
358− type Item Text = Char
359− fromList = pack
360− toList = unpack
361−#endif
362−
363331#if defined(HAVE_DEEPSEQ)
364−instance NFData Text where rnf !_ = ()
332+instance NFData Text
365333#endif
366334
367−instance Binary Text where
368− put t = put (encodeUtf8 t)
369− get = do
370− bs <- get
371− case decodeUtf8' bs of
372− P.Left exn -> P.fail (P.show exn)
373− P.Right a -> P.return a
374−
375335-- | This instance preserves data abstraction at the cost of inefficiency.
376336-- We omit reflection services for the sake of data abstraction.
377337--
378−-- This instance was created by copying the updated behavior of
379−-- @"Data.Set".@'Data.Set.Set' and @"Data.Map".@'Data.Map.Map'. If you
380−-- feel a mistake has been made, please feel free to submit
381−-- improvements.
338+-- This instance was created by copying the behavior of Data.Set and
339+-- Data.Map. If you feel a mistake has been made, please feel free to
340+-- submit improvements.
382341--
383−-- The original discussion is archived here:
384−-- <http://groups.google.com/group/haskell-cafe/browse_thread/thread/b5bbb1b28a7e525d/0639d46852575b93 could we get a Data instance for Data.Text.Text? >
342+-- Original discussion is archived here:
385343--
386−-- The followup discussion that changed the behavior of 'Data.Set.Set'
387−-- and 'Data.Map.Map' is archived here:
388−-- <http://markmail.org/message/trovdc6zkphyi3cr#query:+page:1+mid:a46der3iacwjcf6n+state:results Proposal: Allow gunfold for Data.Map, ... >
344+-- "could we get a Data instance for Data.Text.Text?"
345+-- http://groups.google.com/group/haskell-cafe/browse_thread/thread/b5bbb1b28a7e525d/0639d46852575b93
389346
390347instance Data Text where
391348 gfoldl f z txt = z pack `f` (unpack txt)
392− toConstr _ = packConstr
393− gunfold k z c = case constrIndex c of
394− 1 -> k (z pack)
395− _ -> P.error "gunfold"
396− dataTypeOf _ = textDataType
397−
398−#if MIN_VERSION_base(4,7,0)
399−-- | Only defined for @base-4.7.0.0@ and later
400−instance PrintfArg Text where
401− formatArg txt = formatString $ unpack txt
402−#endif
403−
404−packConstr :: Constr
405−packConstr = mkConstr textDataType "pack" [] Prefix
406−
407−textDataType :: DataType
408−textDataType = mkDataType "Data.Text.Text" [packConstr]
349+ toConstr _ = P.error "Data.Text.Text.toConstr"
350+ gunfold _ _ = P.error "Data.Text.Text.gunfold"
351+ dataTypeOf _ = mkNoRepType "Data.Text.Text"
409352
410353-- | /O(n)/ Compare two 'Text' values lexicographically.
411354compareText :: Text -> Text -> Ordering
@@ -430,6 +373,30 @@ pack :: String -> Text
430373pack = unstream . S.map safe . S.streamList
431374{-# INLINE [1] pack #-}
432375
376+-- | /O(n)/ Convert a 'Text' into a 'String'. Subject to fusion.
377+unpack :: Text -> String
378+unpack = S.unstreamList . stream
379+{-# INLINE [1] unpack #-}
380+
381+-- | /O(n)/ Convert a literal string into a Text. Subject to fusion.
382+unpackCString# :: Addr# -> Text
383+unpackCString# addr# = unstream (S.streamCString# addr#)
384+{-# NOINLINE unpackCString# #-}
385+
386+{-# RULES "TEXT literal" forall a.
387+ unstream (S.map safe (S.streamList (GHC.unpackCString# a)))
388+ = unpackCString# a #-}
389+
390+{-# RULES "TEXT literal UTF8" forall a.
391+ unstream (S.map safe (S.streamList (GHC.unpackCStringUtf8# a)))
392+ = unpackCString# a #-}
393+
394+-- | /O(1)/ Convert a character into a Text. Subject to fusion.
395+-- Performs replacement on invalid scalar values.
396+singleton :: Char -> Text
397+singleton = unstream . S.singleton . safe
398+{-# INLINE [1] singleton #-}
399+
433400-- -----------------------------------------------------------------------------
434401-- * Basic functions
435402
@@ -460,7 +427,6 @@ append a@(Text arr1 off1 len1) b@(Text arr2 off2 len2)
460427 | otherwise = overflowError "append"
461428 where
462429 len = len1+len2
463− x :: ST s (A.MArray s)
464430 x = do
465431 arr <- A.new len
466432 A.copyI arr 0 arr1 off1 len1
@@ -486,8 +452,8 @@ head t = S.head (stream t)
486452uncons :: Text -> Maybe (Char, Text)
487453uncons t@(Text arr off len)
488454 | len <= 0 = Nothing
489− | otherwise = Just $ let !(Iter c d) = iter t 0
490− in (c, text arr (off+d) (len-d))
455+ | otherwise = Just (c, text arr (off+d) (len-d))
456+ where Iter c d = iter t 0
491457{-# INLINE [1] uncons #-}
492458
493459-- | Lifted from Control.Arrow and specialized.
@@ -572,9 +538,7 @@ isSingleton = S.isSingleton . stream
572538-- Subject to fusion.
573539length :: Text -> Int
574540length t = S.length (stream t)
575−{-# INLINE [0] length #-}
576−-- length needs to be phased after the compareN/length rules otherwise
577−-- it may inline before the rules have an opportunity to fire.
541+{-# INLINE length #-}
578542
579543-- | /O(n)/ Compare the count of characters in a 'Text' to a number.
580544-- Subject to fusion.
@@ -593,32 +557,32 @@ compareLength t n = S.compareLengthI (stream t) n
593557
594558{-# RULES
595559"TEXT ==N/length -> compareLength/==EQ" [~1] forall t n.
596− eqInt (length t) n = compareLength t n == EQ
560+ (==) (length t) n = compareLength t n == EQ
597561 #-}
598562
599563{-# RULES
600564"TEXT /=N/length -> compareLength//=EQ" [~1] forall t n.
601− neInt (length t) n = compareLength t n /= EQ
565+ (/=) (length t) n = compareLength t n /= EQ
602566 #-}
603567
604568{-# RULES
605569"TEXT <N/length -> compareLength/==LT" [~1] forall t n.
606− ltInt (length t) n = compareLength t n == LT
570+ (<) (length t) n = compareLength t n == LT
607571 #-}
608572
609573{-# RULES
610574"TEXT <=N/length -> compareLength//=GT" [~1] forall t n.
611− leInt (length t) n = compareLength t n /= GT
575+ (<=) (length t) n = compareLength t n /= GT
612576 #-}
613577
614578{-# RULES
615579"TEXT >N/length -> compareLength/==GT" [~1] forall t n.
616− gtInt (length t) n = compareLength t n == GT
580+ (>) (length t) n = compareLength t n == GT
617581 #-}
618582
619583{-# RULES
620584"TEXT >=N/length -> compareLength//=LT" [~1] forall t n.
621− geInt (length t) n = compareLength t n /= LT
585+ (>=) (length t) n = compareLength t n /= LT
622586 #-}
623587
624588-- -----------------------------------------------------------------------------
@@ -649,48 +613,22 @@ reverse :: Text -> Text
649613reverse t = S.reverse (stream t)
650614{-# INLINE reverse #-}
651615
652−-- | /O(m+n)/ Replace every non-overlapping occurrence of @needle@ in
653−-- @haystack@ with @replacement@.
654−--
655−-- This function behaves as though it was defined as follows:
656−--
657−-- @
658−-- replace needle replacement haystack =
659−-- 'intercalate' replacement ('splitOn' needle haystack)
660−-- @
661−--
662−-- As this suggests, each occurrence is replaced exactly once. So if
663−-- @needle@ occurs in @replacement@, that occurrence will /not/ itself
664−-- be replaced recursively:
665−--
666−-- > replace "oo" "foo" "oo" == "foo"
667−--
668−-- In cases where several instances of @needle@ overlap, only the
669−-- first one will be replaced:
670−--
671−-- > replace "ofo" "bar" "ofofo" == "barfo"
616+-- | /O(m+n)/ Replace every occurrence of one substring with another.
672617--
673618-- In (unlikely) bad cases, this function's time complexity degrades
674619-- towards /O(n*m)/.
675−replace :: Text
676− -- ^ @needle@ to search for. If this string is empty, an
677− -- error will occur.
678− -> Text
679− -- ^ @replacement@ to replace @needle@ with.
680− -> Text
681− -- ^ @haystack@ in which to search.
682− -> Text
620+replace :: Text -> Text -> Text -> Text
683621replace needle@(Text _ _ neeLen)
684622 (Text repArr repOff repLen)
685623 haystack@(Text hayArr hayOff hayLen)
686624 | neeLen == 0 = emptyError "replace"
687625 | L.null ixs = haystack
688626 | len > 0 = Text (A.run x) 0 len
627+ | len < 0 = overflowError "replace"
689628 | otherwise = empty
690629 where
691630 ixs = indices needle haystack
692− len = hayLen - (neeLen - repLen) `mul` L.length ixs
693− x :: ST s (A.MArray s)
631+ len = hayLen - (neeLen - repLen) * L.length ixs
694632 x = do
695633 marr <- A.new len
696634 let loop (i:is) o d = do
@@ -720,8 +658,9 @@ replace needle@(Text _ _ neeLen)
720658-- /Note/: In some languages, case conversion is a locale- and
721659-- context-dependent operation. The case conversion functions in this
722660-- module are /not/ locale sensitive. Programs that require locale
723−-- sensitivity should use appropriate versions of the
724−-- <http://hackage.haskell.org/package/text-icu-0.6.3.7/docs/Data-Text-ICU.html#g:4 case mapping functions from the text-icu package >.
661+-- sensitivity should use appropriate versions of the case mapping
662+-- functions from the @text-icu@ package:
663+-- <http://hackage.haskell.org/package/text-icu>
725664
726665-- | /O(n)/ Convert a string to folded case. Subject to fusion.
727666--
@@ -741,7 +680,7 @@ replace needle@(Text _ _ neeLen)
741680-- instead of itself.
742681toCaseFold :: Text -> Text
743682toCaseFold t = unstream (S.toCaseFold (stream t))
744−{-# INLINE toCaseFold #-}
683+{-# INLINE [0] toCaseFold #-}
745684
746685-- | /O(n)/ Convert a string to lower case, using simple case
747686-- conversion. Subject to fusion.
@@ -901,7 +840,6 @@ concat ts = case ts' of
901840 where
902841 ts' = L.filter (not . null) ts
903842 len = sumP "concat" $ L.map lengthWord16 ts'
904− go :: ST s (A.MArray s)
905843 go = do
906844 arr <- A.new len
907845 let step i (Text a o l) =
@@ -915,13 +853,13 @@ concatMap f = concat . foldr ((:) . f) []
915853{-# INLINE concatMap #-}
916854
917855-- | /O(n)/ 'any' @p@ @t@ determines whether any character in the
918−-- 'Text' @t@ satisfies the predicate @p@. Subject to fusion.
856+-- 'Text' @t@ satisifes the predicate @p@. Subject to fusion.
919857any :: (Char -> Bool) -> Text -> Bool
920858any p t = S.any p (stream t)
921859{-# INLINE any #-}
922860
923861-- | /O(n)/ 'all' @p@ @t@ determines whether all characters in the
924−-- 'Text' @t@ satisfy the predicate @p@. Subject to fusion.
862+-- 'Text' @t@ satisify the predicate @p@. Subject to fusion.
925863all :: (Char -> Bool) -> Text -> Bool
926864all p t = S.all p (stream t)
927865{-# INLINE all #-}
@@ -1012,10 +950,10 @@ replicate n t@(Text a o l)
1012950 | n <= 0 || l <= 0 = empty
1013951 | n == 1 = t
1014952 | isSingleton t = replicateChar n (unsafeHead t)
1015− | otherwise = Text (A.run x) 0 len
953+ | n <= maxBound `quot` l = Text (A.run x) 0 len
954+ | otherwise = overflowError "replicate"
1016955 where
1017− len = l `mul` n
1018− x :: ST s (A.MArray s)
956+ len = l * n
1019957 x = do
1020958 arr <- A.new len
1021959 let loop !d !i | i >= n = return arr
@@ -1152,27 +1090,6 @@ takeWhile p t@(Text arr off len) = loop 0
11521090 unstream (S.takeWhile p (stream t)) = takeWhile p t
11531091 #-}
11541092
1155−-- | /O(n)/ 'takeWhileEnd', applied to a predicate @p@ and a 'Text',
1156−-- returns the longest suffix (possibly empty) of elements that
1157−-- satisfy @p@. Subject to fusion.
1158−-- Examples:
1159−--
1160−-- > takeWhileEnd (=='o') "foo" == "oo"
1161−takeWhileEnd :: (Char -> Bool) -> Text -> Text
1162−takeWhileEnd p t@(Text arr off len) = loop (len-1) len
1163− where loop !i !l | l <= 0 = t
1164− | p c = loop (i+d) (l+d)
1165− | otherwise = text arr (off+l) (len-l)
1166− where (c,d) = reverseIter t i
1167−{-# INLINE [1] takeWhileEnd #-}
1168−
1169−{-# RULES
1170−"TEXT takeWhileEnd -> fused" [~1] forall p t.
1171− takeWhileEnd p t = S.reverse (S.takeWhile p (S.reverseStream t))
1172−"TEXT takeWhileEnd -> unfused" [1] forall p t.
1173− S.reverse (S.takeWhile p (S.reverseStream t)) = takeWhileEnd p t
1174− #-}
1175−
11761093-- | /O(n)/ 'dropWhile' @p@ @t@ returns the suffix remaining after
11771094-- 'takeWhile' @p@ @t@. Subject to fusion.
11781095dropWhile :: (Char -> Bool) -> Text -> Text
@@ -1191,9 +1108,8 @@ dropWhile p t@(Text arr off len) = loop 0 0
11911108 #-}
11921109
11931110-- | /O(n)/ 'dropWhileEnd' @p@ @t@ returns the prefix remaining after
1194−-- dropping characters that satisfy the predicate @p@ from the end of
1111+-- dropping characters that fail the predicate @p@ from the end of
11951112-- @t@. Subject to fusion.
1196−--
11971113-- Examples:
11981114--
11991115-- > dropWhileEnd (=='.') "foo..." == "foo"
@@ -1213,7 +1129,7 @@ dropWhileEnd p t@(Text arr off len) = loop (len-1) len
12131129 #-}
12141130
12151131-- | /O(n)/ 'dropAround' @p@ @t@ returns the substring remaining after
1216−-- dropping characters that satisfy the predicate @p@ from both the
1132+-- dropping characters that fail the predicate @p@ from both the
12171133-- beginning and end of @t@. Subject to fusion.
12181134dropAround :: (Char -> Bool) -> Text -> Text
12191135dropAround p = dropWhile p . dropWhileEnd p
@@ -1308,9 +1224,9 @@ tails t | null t = [empty]
13081224-- copies to create substrings; they just construct new 'Text's that
13091225-- are slices of the original.
13101226
1311−-- | /O(m+n)/ Break a 'Text' into pieces separated by the first 'Text'
1312−-- argument (which cannot be empty), consuming the delimiter. An empty
1313−-- delimiter is invalid, and will cause an error to be raised.
1227+-- | /O(m+n)/ Break a 'Text' into pieces separated by the first
1228+-- 'Text' argument, consuming the delimiter. An empty delimiter is
1229+-- invalid, and will cause an error to be raised.
13141230--
13151231-- Examples:
13161232--
@@ -1323,16 +1239,9 @@ tails t | null t = [empty]
13231239-- > intercalate s . splitOn s == id
13241240-- > splitOn (singleton c) == split (==c)
13251241--
1326−-- (Note: the string @s@ to split on above cannot be empty.)
1327−--
13281242-- In (unlikely) bad cases, this function's time complexity degrades
13291243-- towards /O(n*m)/.
1330−splitOn :: Text
1331− -- ^ String to split on. If this string is empty, an error
1332− -- will occur.
1333− -> Text
1334− -- ^ Input text.
1335− -> [Text]
1244+splitOn :: Text -> Text -> [Text]
13361245splitOn pat@(Text _ _ l) src@(Text arr off len)
13371246 | l <= 0 = emptyError "splitOn"
13381247 | isSingleton pat = split (== unsafeHead pat) src
@@ -1540,7 +1449,7 @@ countChar c t = S.countChar c (stream t)
15401449-- equivalent to a pair of 'unpack' operations.
15411450zip :: Text -> Text -> [(Char,Char)]
15421451zip a b = S.unstreamList $ S.zipWith (,) (stream a) (stream b)
1543−{-# INLINE zip #-}
1452+{-# INLINE [0] zip #-}
15441453
15451454-- | /O(n)/ 'zipWith' generalises 'zip' by zipping with the function
15461455-- given as the first argument, instead of a tupling function.
@@ -1548,7 +1457,7 @@ zip a b = S.unstreamList $ S.zipWith (,) (stream a) (stream b)
15481457zipWith :: (Char -> Char -> Char) -> Text -> Text -> Text
15491458zipWith f t1 t2 = unstream (S.zipWith g (stream t1) (stream t2))
15501459 where g a b = safe (f a b)
1551−{-# INLINE zipWith #-}
1460+{-# INLINE [0] zipWith #-}
15521461
15531462-- | /O(n)/ Breaks a 'Text' up into a list of words, delimited by 'Char's
15541463-- representing white space.
@@ -1748,7 +1657,6 @@ overflowError fun = P.error $ "Data.Text." ++ fun ++ ": size overflow"
17481657copy :: Text -> Text
17491658copy (Text arr off len) = Text (A.run go) 0 len
17501659 where
1751− go :: ST s (A.MArray s)
17521660 go = do
17531661 marr <- A.new len
17541662 A.copyI marr 0 arr off len