Ticket #1902: 1902.patch

New patches:

[Implement genericPower, genericPower'. (^), (^^) now take Int as their 2nd arg
Ian Lynagh <igloo@earth.li>**20071115184238] {
hunk ./GHC/Real.lhs 402
-{-# SPECIALISE (^) ::
-       Integer -> Integer -> Integer,
-       Integer -> Int -> Integer,
-       Int -> Int -> Int #-}
-(^)            :: (Num a, Integral b) => a -> b -> a
-_ ^ 0          =  1
-x ^ n | n > 0  =  f x (n-1) x
-                  where f _ 0 y = y
-                        f a d y = g a d  where
-                                  g b i | even i  = g (b*b) (i `quot` 2)
-                                        | otherwise = f b (i-1) (b*y)
-_ ^ _          = error "Prelude.^: negative exponent"
+{-# SPECIALISE (^) :: Integer -> Int -> Integer,
+                      Int -> Int -> Int #-}
+(^) :: Num a => a -> Int -> a
+x ^ n | n >= 0    = genericPower x n
+      | otherwise = error "Prelude.^: negative exponent"
+
+-------------------------------------------------------
+-- | raise a number to a non-negative integral power
+{-# SPECIALISE genericPower :: Integer -> Integer -> Integer,
+                               Integer -> Int -> Integer,
+                               Int -> Int -> Int #-}
+genericPower :: (Num a, Integral b) => a -> b -> a
+genericPower _ 0 = 1
+genericPower x n | n > 0 = f x (n - 1) x
+    where f _ 0 y = y
+          f a d y = g a d
+              where g b i | even i    = g (b * b) (i `quot` 2)
+                          | otherwise = f b (i - 1) (b * y)
+genericPower _ _ = error "Prelude.genericPower: negative exponent"
+
+-- | raise a number to an integral power
+{-# SPECIALISE (^^) :: Rational -> Int -> Rational #-}
+(^^) :: Fractional a => a -> Int -> a
+x ^^ n = genericPower' x n
hunk ./GHC/Real.lhs 428
-{-# SPECIALISE (^^) ::
-       Rational -> Int -> Rational #-}
-(^^)           :: (Fractional a, Integral b) => a -> b -> a
-x ^^ n         =  if n >= 0 then x^n else recip (x^(negate n))
+{-# SPECIALISE genericPower' :: Rational -> Int -> Rational #-}
+genericPower' :: (Fractional a, Integral b) => a -> b -> a
+genericPower' x n = if n >= 0 then genericPower x n
+                              else recip (genericPower x (negate n))
hunk ./Text/Read/Lex.hs 42
-                toInteger, (^), (^^), infinity, notANumber )
+                toInteger, genericPower, genericPower', infinity, notANumber )
hunk ./Text/Read/Lex.hs 346
-    | exp >= 0  = Int (a * (10 ^ exp))                 -- 43e7
+    | exp >= 0  = Int (a * genericPower 10 exp)                        -- 43e7
hunk ./Text/Read/Lex.hs 357
-  valExp rat exp = rat * (10 ^^ exp)
+  valExp rat exp = rat * genericPower' 10 exp
}

[We no longer need to constraint the type of (^)'s 2nd arg to Int
Ian Lynagh <igloo@earth.li>**20071115184435] {
hunk ./Data/Complex.hs 113
-                    (sqrt ((scaleFloat mk x)^(2::Int) + (scaleFloat mk y)^(2::Int)))
+                    (sqrt ((scaleFloat mk x)^2 + (scaleFloat mk y)^2))
}

Context:

[Fix ` characters in elem's haddock docs
Ian Lynagh <igloo@earth.li>**20071110173052] 
[Filter out GHC.Prim also for the Haddock step
David Waern <david.waern@gmail.com>**20071109000806
 Please merge to the GHC 6.8.2 branch
] 
[Add module of special magic GHC desugaring helper functions
Simon Marlow <simonmar@microsoft.com>**20071102160054
 Currently containing only one such helper: (>>>) for arrow desugaring
] 
[add Control.Category to the nhc98 build
Malcolm.Wallace@cs.york.ac.uk**20071030120459] 
[fix nhc98 build: need a qualified Prelude import
Malcolm.Wallace@cs.york.ac.uk**20071030120410] 
[Fix performance regression: re-instate -funbox-strict-fields
Simon Marlow <simonmar@microsoft.com>**20071029150730
 Yikes!  While investigating the increase in code size with GHC 6.8
 relative to 6.6, I noticed that in the transition to Cabal for the
 libraries we lost -funbox-strict-fields, which is more or less
 depended on by the IO library for performance.  I'm astonished that we
 didn't notice this earlier!
 
 To reduce the chances of this happening again, I put
 -funbox-strict-fields in the OPTIONS_GHC pragma of the modules that
 need it.  {-# UNPACK #-} pragmas would be better, though.
] 
[FIX BUILD: Haddock 1.x fails to parse (Prelude..)
Simon Marlow <simonmar@microsoft.com>**20071029131921] 
[new Control.Category, ghc ticket #1773
Ashley Yakeley <ashley@semantic.org>**20071029022526] 
[new Control.Compositor module
Ashley Yakeley <ashley@semantic.org>**20071013074851
 
 The Compositor class is a superclass of Arrow.
] 
[Fix doc building with Haddock 0.9
Simon Marlow <simonmar@microsoft.com>**20071024090947
 I was using a recent build here, which is more tolerant.
] 
[FIX #1258: document that openTempFile is secure(ish)
Simon Marlow <simonmar@microsoft.com>**20071023130928
 Also change the mode from 0666 to 0600, which seems like a more
 sensible value and matches what C's mkstemp() does.
] 
[Clean up .cabal file a bit
Duncan Coutts <duncan@haskell.org>**20071022132708
 specify build-type and cabal-version >= 1.2
 put extra-tmp-files in the right place
 use os(windows) rather than os(mingw32)
] 
[FIX #1652: openTempFile should accept an empty string for the directory
Simon Marlow <simonmar@microsoft.com>**20071018122345] 
[clean up duplicate code
Simon Marlow <simonmar@microsoft.com>**20071017141311] 
[base in 6.8 and head branch should be version 3.0
Don Stewart <dons@galois.com>**20071007150408] 
[expose the value of +RTS -N as GHC.Conc.numCapabilities (see #1733)
Simon Marlow <simonmar@microsoft.com>**20071009132042] 
[typo
Simon Marlow <simonmar@microsoft.com>**20070917130703] 
[put extra-tmp-files field in the right place
Simon Marlow <simonmar@microsoft.com>**20070914140812] 
[TAG 2007-09-13
Ian Lynagh <igloo@earth.li>**20070913215720] 
[Add more entries to boring file
Ian Lynagh <igloo@earth.li>**20070913210500] 
[Add a boring file
Ian Lynagh <igloo@earth.li>**20070913204641] 
[FIX #1689 (openTempFile returns wrong filename)
Tim Chevalier <chevalier@alum.wellesley.edu>**20070913052025] 
[TAG ghc-6.8 branched 2007-09-03
Ian Lynagh <igloo@earth.li>**20070903155541] 
[Remove some incorrect rules; fixes #1658: CSE [of Doubles] changes semantics
Ian Lynagh <igloo@earth.li>**20070904134140] 
[make hWaitForInput/hReady not fail with "invalid argument" on Windows
Simon Marlow <simonmar@microsoft.com>**20070830131115
 See #1198.  This doesn't fully fix it, because hReady still always
 returns False on file handles.  I'm not really sure how to fix that.
] 
[Fix haddock docs in Hashtable
Ian Lynagh <igloo@earth.li>**20070830154131] 
[Fix building HashTable: Use ord rather than fromEnum
Ian Lynagh <igloo@earth.li>**20070830150214] 
[Better hash functions for Data.HashTable, from Jan-Willem Maessen
Ian Lynagh <igloo@earth.li>**20070830142844] 
[Remove redundant include/Makefile
Ian Lynagh <igloo@earth.li>**20070828205659] 
[Make arrays safer (e.g. trac #1046)
Ian Lynagh <igloo@earth.li>**20070810163405] 
[delete configure droppings in setup clean
Simon Marlow <simonmar@microsoft.com>**20070824104100] 
[FIX #1282: 64-bit unchecked shifts are not exported from base
Simon Marlow <simonmar@microsoft.com>**20070823135033
 I've exported these functions from GHC.Exts.  They are still
 implemented using the FFI underneath, though.
 
 To avoid conditional exports, on a 64-bit build:
 
   uncheckedShiftL64# = uncheckShiftL#
 
 (etc.) which has a different type than the 32-bit version of
 uncheckedShiftL64#, but at least GHC.Exts exports the same names.
 
] 
[Fix hashInt
Ian Lynagh <igloo@earth.li>**20070821140706
 As pointed out in
 http://www.haskell.org/pipermail/glasgow-haskell-bugs/2007-August/009545.html
 the old behaviour was
 Prelude Data.HashTable> map hashInt [0..10]
 [0,-1,-1,-2,-2,-2,-3,-3,-4,-4,-4]
 
 Fixed according to the "Fibonacci Hashing" algorithm described in
 http://www.brpreiss.com/books/opus4/html/page213.html
 http://www.brpreiss.com/books/opus4/html/page214.html
] 
[test impl(ghc) instead of IsGHC
Ross Paterson <ross@soi.city.ac.uk>**20070819233500] 
[fpstring.h has moved to bytestring
Ross Paterson <ross@soi.city.ac.uk>**20070819233815] 
[remove now-unused SIG constants
Ross Paterson <ross@soi.city.ac.uk>**20070819233745] 
[include Win32 extra-libraries for non-GHC's too
Ross Paterson <ross@soi.city.ac.uk>**20070819233611] 
[Don't import Distribution.Setup in Setup.hs as we no longer need it
Ian Lynagh <igloo@earth.li>**20070816151643] 
[install Typeable.h for use by other packages
Malcolm.Wallace@cs.york.ac.uk**20070813112855] 
[Don't try to build modules no longer living in base.
Malcolm.Wallace@cs.york.ac.uk**20070813112803] 
[Correct the swapMVar haddock doc
Ian Lynagh <igloo@earth.li>**20070814145028] 
[Move Data.{Foldable,Traversable} back to base
Ian Lynagh <igloo@earth.li>**20070812165654
 The Array instances are now in Data.Array.
] 
[Remove bits left over from the old build system
Ian Lynagh <igloo@earth.li>**20070811135019] 
[Move the datamap001 (our only test) to the containers package
Ian Lynagh <igloo@earth.li>**20070803180932] 
[Data.Array* and Data.PackedString have now moved to their own packages
Ian Lynagh <igloo@earth.li>**20070801235542] 
[Remove a number of modules now in a "containers" package
Ian Lynagh <igloo@earth.li>**20070801223858] 
[Remove System.Posix.Signals (moving to unix)
Ian Lynagh <igloo@earth.li>**20070729215213] 
[bytestring is now in its own package
Ian Lynagh <igloo@earth.li>**20070729132215] 
[Export throwErrnoPath* functions
Ian Lynagh <igloo@earth.li>**20070722002923] 
[Add simple haddock docs for throwErrnoPath* functions
Ian Lynagh <igloo@earth.li>**20070722002817] 
[Move throwErrnoPath* functions from unix:System.Posix.Error
Ian Lynagh <igloo@earth.li>**20070722002746] 
[Clarify the swapMVar haddock doc
Ian Lynagh <igloo@earth.li>**20070807185557] 
[fix Haddock markup
Simon Marlow <simonmar@microsoft.com>**20070802081717] 
[Temporarily fix breakage for nhc98.
Malcolm.Wallace@cs.york.ac.uk**20070801163750
 A recent patch to System.IO introduced a cyclic dependency on Foreign.C.Error,
 and also inadvertently dragged along System.Posix.Internals which has
 non-H'98 layout, causing many build problems.  The solution for now
 is to #ifndef __NHC__ all of the recent the openTempFile additions,
 and mark them non-portable once again.  (I also took the opportunity
 to note a number of other non-portable functions in their Haddock
 comments.)
] 
[Generalise the type of synthesize, as suggested by Trac #1571
simonpj@microsoft**20070801125208
 
 I have not looked at the details, but the type checker is happy with the
 more general type, and more general types are usually a Good Thing.
 
] 
[Fix fdToHandle on Windows
Ian Lynagh <igloo@earth.li>**20070730133139
 The old setmode code was throwing an exception, and I'm not sure it is
 meant to do what we need anyway. For now we assume that all FDs are
 both readable and writable.
] 
[Handle buffers should be allocated with newPinnedByteArray# always
Simon Marlow <simonmar@microsoft.com>**20070725095550
 Not just on Windows.  This change is required because we now use safe
 foreign calls for I/O on blocking file descriptors with the threaded
 RTS.  Exposed by concio001.thr on MacOS X: MacOS apparently uses
 smaller buffers by default, so they weren't being allocated as large
 objects.
 
] 
[Correct Windows OS name in cabal configuration
Ian Lynagh <igloo@earth.li>**20070729161739] 
[Use cabal configurations rather than Setup hacks
Ian Lynagh <igloo@earth.li>**20070729132157] 
[fix Hugs implementation of openTempFile
Ross Paterson <ross@soi.city.ac.uk>**20070724114003] 
[Hugs only: avoid dependency cycle
Ross Paterson <ross@soi.city.ac.uk>**20070724113852] 
[open(Binary)TempFile is now portable
Ian Lynagh <igloo@earth.li>**20070722152752] 
[Tweak temporary file filename chooser
Ian Lynagh <igloo@earth.li>**20070722105445] 
[Move open(Binary)TempFile to System.IO
Ian Lynagh <igloo@earth.li>**20070722010205] 
[Rename openFd to fdToHandle'
Ian Lynagh <igloo@earth.li>**20070721235538
 The name collision with System.Posix.IO.openFd made my brain hurt.
] 
[Add a test for Data.Map, for a bug on the libraries@ list
Ian Lynagh <igloo@earth.li>**20070721002119] 
[fix Data.Map.updateAt
Bertram Felgenhauer <int-e@gmx.de>**20070718150340
 See http://haskell.org/pipermail/libraries/2007-July/007785.html for a piece
 of code triggering the bug. updateAt threw away parts of the tree making up
 the map.
] 
[in hClose, free the handle buffer by replacing it with an empty one
Simon Marlow <simonmar@microsoft.com>**20070719161419
 This helps reduce the memory requirements for a closed but unfinalised
 Handle.
] 
[Implement GHC.Environment.getFullArgs
Ian Lynagh <igloo@earth.li>**20070717141918
 This returns all the arguments, including those normally eaten by the
 RTS (+RTS ... -RTS).
 This is mainly for ghc-inplace, where we need to pass /all/ the
 arguments on to the real ghc. e.g. ioref001(ghci) was failing because
 the +RTS -K32m -RTS wasn't getting passed on.
] 
[Define stripPrefix; fixes trac #1464
Ian Lynagh <igloo@earth.li>**20070714235204] 
[no need to hide Maybe
Malcolm.Wallace@cs.york.ac.uk**20070710154058] 
[Add a more efficient Data.List.foldl' for GHC (from GHC's utils/Util.lhs)
Ian Lynagh <igloo@earth.li>**20070706205526] 
[Remove include-dirs ../../includes and ../../rts
Ian Lynagh <igloo@earth.li>**20070705205356
 We get these by virtue of depending on the rts package.
] 
[FIX #1131 (newArray_ allocates an array full of garbage)
Simon Marlow <simonmar@microsoft.com>**20070704102020
 Now newArray_ returns a deterministic result in the ST monad, and
 behaves as before in other contexts.  The current newArray_ is renamed
 to unsafeNewArray_; the MArray class therefore has one more method
 than before.
] 
[change nhc98 option from -prelude to --prelude
Malcolm.Wallace@cs.york.ac.uk**20070702150355] 
[Word is a type synonym in nhc98 - so class instance not permitted.
Malcolm.Wallace@cs.york.ac.uk**20070629122035] 
[fix bug in writes to blocking FDs in the non-threaded RTS
Simon Marlow <simonmar@microsoft.com>**20070628134320] 
[Modernize printf.
lennart.augustsson@credit-suisse.com**20070628083852
 
 Add instances for Int8, Int16, Int32, Int64, Word, Word8, Word16, Word32, and
 Word64.
 Handle + flag.
 Handle X, E, and G formatting characters.
 Rewrite internals to make it simpler.
] 
[Speed up number printing and remove the need for Array by using the standard 'intToDigit' routine
John Meacham <john@repetae.net>**20070608182353] 
[Use "--  //" (2 spaces) rather than "-- //" (1) to avoid tripping haddock up
Ian Lynagh <igloo@earth.li>**20070627010930
 Are we nearly there yet?
] 
[Use a combination of Haskell/C comments to ensure robustness.
Malcolm.Wallace@cs.york.ac.uk**20070626095222
 e.g. -- // ensures that _no_ preprocessor will try to tokenise the
 rest of the line.
] 
[Change C-style comments to Haskell-style.
Malcolm.Wallace@cs.york.ac.uk**20070625094515
 These two headers are only ever used for pre-processing Haskell code,
 and are never seen by any C tools except cpp.  Using the Haskell comment
 convention means that cpphs no longer needs to be given the --strip
 option to remove C comments from open code.  This is a Good Thing,
 because all of /* */ and // are valid Haskell operator names, and there
 is no compelling reason to forbid using them in files which also happen
 to have C-preprocessor directives.
] 
[makefileHook needs to generate PrimopWrappers.hs too
Simon Marlow <simonmar@microsoft.com>**20070622073424] 
[Hugs now gets MonadFix(mfix) from its prelude
Ross Paterson <ross@soi.city.ac.uk>**20070620000343] 
[Typo (consUtils.hs -> consUtils.h)
Ian Lynagh <igloo@earth.li>**20070619124140] 
[install dependent include files and Typeable.h
Bertram Felgenhauer <int-e@gmx.de>**20070613041734] 
[update prototype following inputReady->fdReady change
Simon Marlow <simonmar@microsoft.com>**20070614095309] 
[FIX hGetBuf001: cut-and-pasto in readRawBufferNoBlock
Simon Marlow <simonmar@microsoft.com>**20070614094222] 
[fix description of CWStringLen
Ross Paterson <ross@soi.city.ac.uk>**20070605223345] 
[Remove unsafeCoerce-importing kludgery in favor of Unsafe.Coerce
Isaac Dupree <id@isaac.cedarswampstudios.org>**20070601203625] 
[--configure-option and --ghc-option are now provided by Cabal
Ross Paterson <ross@soi.city.ac.uk>**20070604115233] 
[Data.PackedString: Data.Generics is GHC-only
Ross Paterson <ross@soi.city.ac.uk>**20070529232427] 
[Add Data instance for PackedString; patch from greenrd in trac #1263
Ian Lynagh <igloo@earth.li>**20070529205420] 
[Control.Concurrent documentation fix
shae@ScannedInAvian.com**20070524163325] 
[add nhc98-options: field to .cabal file
Malcolm.Wallace@cs.york.ac.uk**20070528122626] 
[add a dummy implementation of System.Timeout.timeout for nhc98
Malcolm.Wallace@cs.york.ac.uk**20070528110309] 
[Add System.Timeout to base.cabal
Ian Lynagh <igloo@earth.li>**20070527123314
 Filtered out for non-GHC by Setup.hs.
] 
[add module Data.Fixed to nhc98 build
Malcolm.Wallace@cs.york.ac.uk**20070525141021] 
[DIRS now lives in package Makefile, not script/pkgdirlist
Malcolm.Wallace@cs.york.ac.uk**20070525111749] 
[delete unused constants
Ross Paterson <ross@soi.city.ac.uk>**20070525001741] 
[remove System.Cmd and System.Time too
Malcolm.Wallace@cs.york.ac.uk**20070524163200] 
[remove locale as well
Malcolm.Wallace@cs.york.ac.uk**20070524161943] 
[nhc98 version of instance Show (a->b) copied from Prelude
Malcolm.Wallace@cs.york.ac.uk**20070524160615] 
[remove directory, pretty, and random bits from base for nhc98
Malcolm.Wallace@cs.york.ac.uk**20070524160608] 
[Remove Makefile and package.conf.in (used in the old build system)
Ian Lynagh <igloo@earth.li>**20070524142545] 
[Split off process package
Ian Lynagh <igloo@earth.li>**20070523210523] 
[Fix comment: maperrno is in Win32Utils.c, not runProcess.c
Ian Lynagh <igloo@earth.li>**20070523181331] 
[System.Locale is now split out
Ian Lynagh <igloo@earth.li>**20070519132638] 
[Split off directory, random and old-time packages
Ian Lynagh <igloo@earth.li>**20070519120642] 
[Remove Control.Parallel*, now in package parallel
Ian Lynagh <igloo@earth.li>**20070518165431] 
[Remove the pretty-printing modules (now in package pretty(
Ian Lynagh <igloo@earth.li>**20070518162521] 
[add install-includes: field
Simon Marlow <simonmar@microsoft.com>**20070517094948] 
[correct the documentation for newForeignPtr
Simon Marlow <simonmar@microsoft.com>**20070516082019] 
[When doing safe writes, handle EAGAIN rather than raising an exception
Simon Marlow <simonmar@microsoft.com>**20070515114615
 It might be that stdin was set to O_NONBLOCK by someone else, and we
 should handle this case.  (this happens with GHCi, I'm not quite sure why)
] 
[Use FilePath to make paths when building GHC/Prim.hs and GHC/PrimopWrappers.hs
Ian Lynagh <igloo@earth.li>**20070514110409] 
[fix imports for non-GHC
Ross Paterson <ross@soi.city.ac.uk>**20070513001138] 
[Give an example of how intersection takes elements from the first set
Ian Lynagh <igloo@earth.li>**20070512160253] 
[further clarify the docs for 'evaluate'
Malcolm.Wallace@cs.york.ac.uk**20070508101124] 
[improve documentation for evaluate
Simon Marlow <simonmar@microsoft.com>**20070508081712] 
[FIX: #724 (tee complains if used in a process started by ghc)
Simon Marlow <simonmar@microsoft.com>**20070507123537
 
 Now, we only set O_NONBLOCK on file descriptors that we create
 ourselves.  File descriptors that we inherit (stdin, stdout, stderr)
 are kept in blocking mode.  The way we deal with this differs between
 the threaded and non-threaded runtimes:
 
  - with -threaded, we just make a safe foreign call to read(), which
    may block, but this is ok.
 
  - without -threaded, we test the descriptor with select() before
    attempting any I/O.  This isn't completely safe - someone else
    might read the data between the select() and the read() - but it's
    a reasonable compromise and doesn't seem to measurably affect
    performance.
] 
[the "unknown" types are no longer required
Simon Marlow <simonmar@microsoft.com>**20070426135931] 
[Build GHC/Prim.hs and GHC/PrimopWrappers.hs from Cabal
Ian Lynagh <igloo@earth.li>**20070509142655] 
[Make Control.Exception buildable by nhc98.
Malcolm.Wallace@cs.york.ac.uk**20070504105548
 The nhc98 does not have true exceptions, but these additions should be
 enough infrastructure to pretend that it does.  Only IO exceptions will
 actually work.
] 
[Trim imports, remove a cycle
simonpj@microsoft**20070503123010
 
 A first attempt at removing gratuitous cycles in the base package.
 I've removed the useless module GHC.Dynamic, which gets rid of a cycle;
 and trimmed off various unnecesary imports.
 
 This also fixes the IsString import problem.
 
] 
[Be less quiet about building the base package
simonpj@microsoft**20070503093707] 
[Remove Splittable class (a vestige of linear implicit parameters)
simonpj@microsoft**20070221104329] 
[Add IsString to exports of GHC.Exts
simonpj@microsoft**20070221104249] 
[tweak documentation as per suggestion from Marc Weber on libraries@haskell.org
Simon Marlow <simonmar@microsoft.com>**20070426075921] 
[Add extra libraries when compiling with GHC on Windows
Ian Lynagh <igloo@earth.li>**20070424213127] 
[Follow Cabal changes in Setup.hs
Ian Lynagh <igloo@earth.li>**20070418114345] 
[inclusion of libc.h is conditional on __APPLE__
Malcolm.Wallace@cs.york.ac.uk**20070417085556] 
[MERGE: fix ugly uses of memcpy foreign import inside ST
Simon Marlow <simonmar@microsoft.com>**20070416101530
 fixes cg026
] 
[Fix configure with no --with-cc
Ian Lynagh <igloo@earth.li>**20070415165143] 
[MacOS 10.3 needs #include <libc.h> as well
Malcolm.Wallace@cs.york.ac.uk**20070414155507] 
[For nhc98 only, use hsc2hs to determine System.Posix.Types.
Malcolm.Wallace@cs.york.ac.uk**20070413155831
 Avoids the existing autoconf stuff, by introducing an auxiliary module
 called NHC.PosixTypes that uses hsc2hs, which is then simply re-exported
 from System.Posix.Types.
] 
[we need a makefileHook too
Simon Marlow <simonmar@microsoft.com>**20070413151307] 
[Remove unnecesary SOURCE import of GHC.Err in GHC.Pack
Ian Lynagh <igloo@earth.li>**20070412235908] 
[add System.Posix.Types to default nhc98 build
Malcolm.Wallace@cs.york.ac.uk**20070412195026] 
[mark System.IO.openTempFile as non-portable in haddocks
Malcolm.Wallace@cs.york.ac.uk**20070412135359] 
[Don't turn on -Werror in Data.Fixed
Ian Lynagh <igloo@earth.li>**20070411155721
 This may be responsible for the x86_64/Linux nightly build failing.
] 
[Fix -Wall warnings
Ian Lynagh <igloo@earth.li>**20070411004929] 
[Add missing case in removePrefix
Ian Lynagh <igloo@earth.li>**20070411002537] 
[Allow additional options to pass on to ./configure to be given
Ian Lynagh <igloo@earth.li>**20070406151856] 
[Hugs only: fix location of unsafeCoerce
Ross Paterson <ross@soi.city.ac.uk>**20070406113731] 
[fix isPortableBuild test
Ross Paterson <ross@soi.city.ac.uk>**20070406111304] 
[Unsafe.Coerce doesn't need Prelude
Ian Lynagh <igloo@earth.li>**20070405175930] 
[make Setup and base.cabal suitable for building the libraries with GHC
Ian Lynagh <igloo@earth.li>**20070308163824] 
[HsByteArray doesn't exist
Ian Lynagh <igloo@earth.li>**20070404163051] 
[Don't use Fd/FD in foreign decls
Ian Lynagh <igloo@earth.li>**20070404155822
 Using CInt makes it much easier to verify that it is right, and we won't
 get caught out by possible newtype switches between CInt/Int.
] 
[HsByteArray doesn't exist
Ian Lynagh <igloo@earth.li>**20070404155732] 
[Fix braino
Ian Lynagh <igloo@earth.li>**20070404144508] 
[Fix incorrect changes to C types in a foreign import for nhc98.
Malcolm.Wallace@cs.york.ac.uk**20070404120954
 If we use type CTime, it needs to be imported.  Also, CTime is not an
 instance of Integral, so use some other mechanism to convert it.
] 
[Fix C/Haskell type mismatches
Ian Lynagh <igloo@earth.li>**20070403194943] 
[add new module Unsafe.Coerce to build system
Malcolm.Wallace@cs.york.ac.uk**20070403131333] 
[Fix type mismatches between foreign imports and HsBase.h
Ian Lynagh <igloo@earth.li>**20070403001611
 
 Merge to stable, checking for interface changes.
] 
[put 'unsafeCoerce' in a standard location
Malcolm.Wallace@cs.york.ac.uk**20061113114103] 
[fix for nhc98 build
Malcolm.Wallace@cs.york.ac.uk**20070402141712] 
[Function crossMapP for fixing desugaring of comprehensions
Manuel M T Chakravarty <chak@cse.unsw.edu.au>**20070402082906
 
 Merge into 6.6 branch.
] 
[Add min/max handling operations for IntSet/IntMap
jeanphilippe.bernardy@gmail.com**20070315072352] 
[Monoid instance for Maybe and two wrappers: First and Last. trac proposal #1189
Jeffrey Yasskin <jyasskin@gmail.com>**20070309062550] 
[Fix the type of wgencat
Ian Lynagh <igloo@earth.li>**20070329164223] 
[fix strictness of foldr/build rule for take, see #1219
Simon Marlow <simonmar@microsoft.com>**20070327103941] 
[remove Makefile.inc (only affects nhc98)
Malcolm.Wallace@cs.york.ac.uk**20070320120057] 
[copyBytes copies bytes, not elements; fixes trac #1203
Ian Lynagh <igloo@earth.li>**20070312113555] 
[Add ioeGetLocation, ioeSetLocation to System/IO/Error.hs; trac #1191
Ian Lynagh <igloo@earth.li>**20070304130315] 
[fix race condition in prodServiceThread
Simon Marlow <simonmar@microsoft.com>**20070307134330
 See #1187
] 
[Prevent duplication of unsafePerformIO on a multiprocessor
Simon Marlow <simonmar@microsoft.com>**20070306145424
 Fixes #986.  The idea is to add a new operation
 
   noDuplicate :: IO ()
 
 it is guaranteed that if two threads have executed noDuplicate, then
 they are not duplicating any computation.
 
 We now provide two new unsafe operations:
 
 unsafeDupablePerformIO    :: IO a -> a
 unsafeDupableInterleaveIO :: IO a -> IO a
 
 which are equivalent to the old unsafePerformIO and unsafeInterleaveIO
 respectively.  The new versions of these functions are defined as:
 
 unsafePerformIO    m = unsafeDupablePerformIO (noDuplicate >> m)
 unsafeInterleaveIO m = unsafeDupableInterleaveIO (noDuplicate >> m)
] 
[expand docs for forkOS
Simon Marlow <simonmar@microsoft.com>**20070305160921] 
[document timeout limitations
Peter Simons <simons@cryp.to>**20070228223540] 
[So many people were involved in the writing of this module that
Peter Simons <simons@cryp.to>**20070228223415
 it feels unfair to single anyone out as the lone copyright
 holder.
] 
[This patch adds a timeout function to the base libraries. Trac #980 is
Peter Simons <simons@cryp.to>**20070126222615
 concerned with this issue. The design guideline for this implementation
 is that 'timeout N E' should behave exactly the same as E as long as E
 doesn't time out. In our implementation, this means that E has the same
 myThreadId it would have without the timeout wrapper. Any exception E
 might throw cancels the timeout and propagates further up. It also
 possible for E to receive exceptions thrown to it by another thread.
] 
[PArr: fixed permutations
Manuel M T Chakravarty <chak@cse.unsw.edu.au>**20070305055807] 
[Add Data.String, containing IsString(fromString); trac proposal #1126
Ian Lynagh <igloo@earth.li>**20070130134841
 This is used by the overloaded strings extension (-foverloaded-strings in GHC).
] 
[GHC.PArr: add bounds checking
Manuel M T Chakravarty <chak@cse.unsw.edu.au>**20070302053224] 
[Bump nhc98 stack size for System/Time.hsc
sven.panne@aedion.de**20070301153009] 
[FDs are CInts now, fixing non-GHC builds
sven.panne@aedion.de**20070225105620] 
[Fixed PArr.dropP
Manuel M T Chakravarty <chak@cse.unsw.edu.au>**20070222032405
 - Thanks to Audrey Tang for the bug report
] 
[Keep the same FD in both halves of a duplex handle when dup'ing
Ian Lynagh <igloo@earth.li>**20070220141039
 Otherwise we only close one of the FDs when closing the handle.
 Fixes trac #1149.
] 
[Remove more redundant FD conversions
Ian Lynagh <igloo@earth.li>**20070220092520] 
[Fix FD changes on Windows
Ian Lynagh <igloo@earth.li>**20070220091516] 
[Consistently use CInt rather than Int for FDs
Ian Lynagh <igloo@earth.li>**20070219233854] 
[Fix the types of minView/maxView (ticket #1134)
jeanphilippe.bernardy@gmail.com**20070210065115] 
[fix for hashString, from Jan-Willem Maessen (see #1137)
Simon Marlow <simonmar@microsoft.com>**20070215094304
 
] 
[fix to getUSecOfDay(): arithmetic was overflowing
Simon Marlow <simonmar@microsoft.com>**20070214161719] 
[The Windows counterpart to 'wrapround of thread delays'
Ian Lynagh <igloo@earth.li>**20070209173510] 
[wrapround of thread delays
Neil Davies <SemanticPhilosopher@gmail.com>**20070129160519
 
   * made the wrapround of the underlying O/S occur before the wrapround
     of the delayed threads by making threads delay in microseconds since
     O/S epoch (1970 - Unix, 1601 - Windows) stored in Word64.
   * removed redundant calls reading O/S realtime clock
   * removed rounding to 1/50th of sec for timers
   * Only for Unix version of scheduler.
] 
[Whitespace changes only
Ian Lynagh <igloo@earth.li>**20070206232722] 
[Add some type sigs
Ian Lynagh <igloo@earth.li>**20070206232439] 
[Use static inline rather than extern inline/inline
Ian Lynagh <igloo@earth.li>**20070205203628
 I understand this is more portable, and it also fixes warnings when
 C things we are wrapping are themselves static inlines (which FD_ISSET
 is on ppc OS X).
] 
[add derived instances for Dual monoid
Ross Paterson <ross@soi.city.ac.uk>**20070202190847] 
[add doc pointers to Foldable
Ross Paterson <ross@soi.city.ac.uk>**20070202110931
 
 Could be applied to STABLE.
] 
[Eliminate some warnings
Ian Lynagh <igloo@earth.li>**20060729220854
 Eliminate warnings in the libraries caused by mixing pattern matching
 with numeric literal matching.
] 
[Remove IsString(fromString) from the Prelude
Ian Lynagh <igloo@earth.li>**20070130124136] 
[Add Kleisli composition
Don Stewart <dons@cse.unsw.edu.au>**20061113015442] 
[IsString is GHC-only (so why is it in the Prelude?)
Ross Paterson <ross@soi.city.ac.uk>**20070123183007] 
[Applicative and Monad instances for Tree
Ross Paterson <ross@soi.city.ac.uk>**20070115174510] 
[Add IsString class for overloaded string literals.
lennart@augustsson.net**20061221210532] 
[Added examples, more detailed documentation to Data.List Extracting sublists functions
Andriy Palamarchuk <apa3a@yahoo.com>**20061204164710] 
[fix threadDelay
Simon Marlow <simonmar@microsoft.com>**20070117091702
 In "Add support for the IO manager thread" I accidentally spammed part
 of "Make sure the threaded threadDelay sleeps at least as long as it
 is asked", which is why the ThreadDelay001 test has been failing.
] 
[update section on "blocking"
Simon Marlow <simonmar@microsoft.com>**20070116124328] 
[Fix crash with   (minBound :: Int*) `div (-1)   as result is maxBound + 1.
Ian Lynagh <igloo@earth.li>**20070115142005] 
[version of example using Tomasz Zielonka's technique
Ross Paterson <ross@soi.city.ac.uk>**20070105175907] 
[Added Unknowns for higher kinds
Pepe Iborra <mnislaih@gmail.com>**20061108155938] 
[Improved the Show instance for Unknown
Pepe Iborra <mnislaih@gmail.com>**20060813111816] 
[Show instance for GHC.Base.Unknown
mnislaih@gmail.com**20060801233530] 
[Introduce Unknowns for the closure viewer. Add breakpointCond which was missing
mnislaih@gmail.com**20060725174537] 
[Fix missing comma in Fractional documentation
Alec Berryman <alec@thened.net>**20061201173237] 
[Mention that throwTo does not guarantee promptness of delivery
simonpj@microsoft**20061211123215] 
[Add note about synhronous delivery of throwTo
simonpj@microsoft**20061211122257] 
[documentation for installHandler
Simon Marlow <simonmar@microsoft.com>**20061205154927
 merge to 6.6
] 
[dos2unix
Simon Marlow <simonmar@microsoft.com>**20061204095439] 
[don't try to compile this on Unix
Simon Marlow <simonmar@microsoft.com>**20061204095427] 
[TAG 6.6 release
Ian Lynagh <igloo@earth.li>**20061011124740] 
[TAG Version 2.1
Ian Lynagh <igloo@earth.li>**20061009114014] 
[Bump version number
Ian Lynagh <igloo@earth.li>**20061009114009] 
[Add support for the IO manager thread on Windows
Simon Marlow <simonmar@microsoft.com>**20061201152042
 Fixes #637.  The test program in that report now works for me with
 -threaded, but it doesn't work without -threaded (I don't know if
 that's new behaviour or not, though).
] 
[deriving (Eq, Ord, Enum, Show, Read, Typeab) for ConsoleEvent
Simon Marlow <simonmar@microsoft.com>**20061201144032] 
[Make sure the threaded threadDelay sleeps at least as long as it is asked to
Ian Lynagh <igloo@earth.li>**20061128204807] 
[Add comments about argument order to the definitions of gmapQ and constrFields
simonpj@microsoft**20061124164505] 
[Hugs: add Control.Parallel.Strategies
Ross Paterson <ross@soi.city.ac.uk>**20061124161039] 
[Move instance of Show Ptr to Ptr.hs (fewer orphans)
simonpj@microsoft.com**20061124100639] 
[Add type signatures
simonpj@microsoft.com**20061124100621] 
[Add an example of the use of unfoldr, following doc feedback from dozer
Don Stewart <dons@cse.unsw.edu.au>**20061124011249] 
[trim imports
Ross Paterson <ross@soi.city.ac.uk>**20061123190352] 
[Data.Graph is now portable (enable for nhc98)
Malcolm.Wallace@cs.york.ac.uk**20061123174913] 
[remove Data.FunctorM and Data.Queue
Ross Paterson <ross@soi.city.ac.uk>**20061112001046
 
 These were deprecated in 6.6, and can thus be removed in 6.8.
] 
[make Data.Graph portable (no change to the interface)
Ross Paterson <ross@soi.city.ac.uk>**20061122010040
 
 The algorithm now uses STArrays on GHC and IntSets elsewhere.
 (Hugs has STArrays, but avoiding them saves a -98, and boxed arrays
 aren't fast under Hugs anyway.)
] 
[One less unsafeCoerce# in the tree
Don Stewart <dons@cse.unsw.edu.au>**20061120120242] 
[typo in comment
Ross Paterson <ross@soi.city.ac.uk>**20061120115106] 
[fix shift docs to match ffi spec
Ross Paterson <ross@soi.city.ac.uk>**20061117003144] 
[(nhc98) use new primitive implementations of h{Put,Get}Buf.
Malcolm.Wallace@cs.york.ac.uk**20061116173104] 
[The wrong 'cycle' was exported from Data.ByteString.Lazy.Char8, spotted by sjanssen
Don Stewart <dons@cse.unsw.edu.au>**20061110021311] 
[LPS chunk sizes should be 16 bytes, not 17. 
Don Stewart <dons@cse.unsw.edu.au>**20061110021254] 
[Update comments on Prelude organisation in GHC/Base.lhs
Ian Lynagh <igloo@earth.li>**20061115001926] 
[Control.Parallel.Strategies clean-up: Added export list to avoid exporting seq, fixed import list strangeness that haddock choked on, and moved the deprecated functions to a separate section.
bringert@cs.chalmers.se**20061113224202] 
[Control.Parallel.Strategies: added NFData instances for Data.Int.*, Data.Word.*, Maybe, Either, Map, Set, Tree, IntMap, IntSet.
bringert@cs.chalmers.se**20061113221843] 
[Control.Parallel.Strategies: deprecate sPar, sSeq, Assoc, fstPairFstList, force and sforce. 
bringert@cs.chalmers.se**20061113215219
 Code comments indicated that sPar and sSeq have been superceded by sparking and demanding, and that Assoc, fstPairFstList, force and sforce are examples and hacks needed by the Lolita system.
] 
[add Control.Monad.Instances to nhc98 build
Malcolm.Wallace@cs.york.ac.uk**20061113113221] 
[Control.Parallel.Strategies: clarified documentation of parListChunk.
bringert@cs.chalmers.se**20061112232904] 
[Added and cleaned up Haddock comments in Control.Parallel.Strategies.
bringert@cs.chalmers.se**20061112220445
 Many of the definitions in Control.Parallel.Strategies had missing or unclear Haddock comments. I converted most of the existing plain code comments to haddock comments, added some missing documentation and cleaned up the existing Haddock mark-up.
] 
[Fix broken pragmas; spotted by Bulat Ziganshin
Ian Lynagh <igloo@earth.li>**20061111205916] 
[add doc link to bound threads section
Ross Paterson <ross@soi.city.ac.uk>**20060929103252] 
[hide Data.Array.IO.Internals
Ross Paterson <ross@soi.city.ac.uk>**20061111113248
 
 It's hidden from haddock, and everything it exports is re-exported by
 Data.Array.IO.
] 
[add Data.Function
Malcolm.Wallace@cs.york.ac.uk**20061110142710] 
[add Data.Function
Ross Paterson <ross@soi.city.ac.uk>**20061110141354] 
[whitespace only
Ross Paterson <ross@soi.city.ac.uk>**20061110141326] 
[move fix to Data.Function
Ross Paterson <ross@soi.city.ac.uk>**20061110141120] 
[import Prelude
Ross Paterson <ross@soi.city.ac.uk>**20061110140445] 
[Added Data.Function (Trac ticket #979).
Nils Anders Danielsson <nad@cs.chalmers.se>**20061110122503
 + A module with simple combinators working solely on and with
   functions.
 + The only new function is "on".
 + Some functions from the Prelude are re-exported.
] 
[__hscore_long_path_size is not portable beyond GHC
Malcolm.Wallace@cs.york.ac.uk**20061110113222] 
[redefine writeFile and appendFile using withFile
Ross Paterson <ross@soi.city.ac.uk>**20061107140359] 
[add withFile and withBinaryFile (#966)
Ross Paterson <ross@soi.city.ac.uk>**20061107134510] 
[remove conflicting import for nhc98
Malcolm.Wallace@cs.york.ac.uk**20061108111215] 
[Add intercalate to Data.List (ticket #971)
Josef Svenningsson <josef.svenningsson@gmail.com>**20061102122052] 
[non-GHC: fix canonicalizeFilePath
Ross Paterson <ross@soi.city.ac.uk>**20061107133902
 
 I've also removed the #ifdef __GLASGOW_HASKELL__ from the proper
 Windows versions of a few functions.  These will need testing with
 Hugs on Windows.
] 
[enable canonicalizePath for non-GHC platforms
Simon Marlow <simonmar@microsoft.com>**20061107121141] 
[Update documentation for hWaitForInput
Simon Marlow <simonmar@microsoft.com>**20061107111430
 See #972
 Merge to 6.6 branch.
] 
[Use unchecked shifts to implement Data.Bits.rotate
Samuel Bronson <naesten@gmail.com>**20061012125553
 This should get rid of those cases, maybe lower the size enough that the inliner will like it?
] 
[fix Haddock module headers
Ross Paterson <ross@soi.city.ac.uk>**20061106124140] 
[fix example in docs
Ross Paterson <ross@soi.city.ac.uk>**20061106115628] 
[Add intercalate and split to Data.List
Josef Svenningsson <josef.svenningsson@gmail.com>*-20061024172357] 
[Data.Generics.Basics is GHC-only
Ross Paterson <ross@soi.city.ac.uk>**20061102111736] 
[#ifdef around non-portable Data.Generics.Basics
Malcolm.Wallace@cs.york.ac.uk**20061102103445] 
[Add deriving Data to Complex
simonpj@microsoft**20061101102059] 
[minor clarification of RandomGen doc
Ross Paterson <ross@soi.city.ac.uk>**20061030230842] 
[rearrange docs a bit
Ross Paterson <ross@soi.city.ac.uk>**20061030161223] 
[Add intercalate and split to Data.List
Josef Svenningsson <josef.svenningsson@gmail.com>**20061024172357] 
[Export pseq from Control.Parallel, and use it in Control.Parallel.Strategies
Simon Marlow <simonmar@microsoft.com>**20061027150141] 
[`par` should be infixr 0
Simon Marlow <simonmar@microsoft.com>**20061027130800
 Alas, I didn't spot this due to lack of testing, and the symptom is
 that an expression like x `par` y `seq z will have exactly the wrong
 parallelism properties.  The workaround is to add parantheses.
 
 I think we could push this to the 6.6 branch.
] 
[fix example in comment
Ross Paterson <ross@soi.city.ac.uk>**20061023163925] 
[Use the new Any type for dynamics (GHC only)
simonpj@microsoft**20061019160408] 
[add Data.Sequence to nhc98 build
Malcolm.Wallace@cs.york.ac.uk**20061012135200] 
[Remove Data.FiniteMap, add Control.Applicative, Data.Traversable, and
Malcolm.Wallace@cs.york.ac.uk**20061012095605
 Data.Foldable to the nhc98 build.
] 
[STM invariants
tharris@microsoft.com**20061007123253] 
[Inline shift in GHC's Bits instances for {Int,Word}{,8,16,32,64}
Samuel Bronson <naesten@gmail.com>**20061009020906] 
[Don't create GHC.Prim when bootstrapping; we can't, and we don't need it
Ian Lynagh <igloo@earth.li>**20061004165355] 
[Data.ByteString: fix lazyness of take, drop & splitAt
Don Stewart <dons@cse.unsw.edu.au>**20061005011703
 
 ByteString.Lazy's take, drop and splitAt were too strict when demanding
 a byte string. Spotted by Einar Karttunen. Thanks to him and to Bertram
 Felgenhauer for explaining the problem and the fix.
 
] 
[Fix syntax error that prevents building Haddock documentation on Windows
brianlsmith@gmail.com**20060917013530] 
[Hugs only: unbreak typeRepKey
Ross Paterson <ross@soi.city.ac.uk>**20060929102743] 
[make hGetBufNonBlocking do something on Windows w/ -threaded
Simon Marlow <simonmar@microsoft.com>**20060927145811
 hGetBufNonBlocking will behave the same as hGetBuf on Windows now, which
 is better than just crashing (which it did previously).
] 
[add typeRepKey :: TypeRep -> IO Int
Simon Marlow <simonmar@microsoft.com>**20060927100342
 See feature request #880
] 
[fix header comment
Ross Paterson <ross@soi.city.ac.uk>**20060926135843] 
[Add strict versions of insertWith and insertWithKey (Data.Map)
jeanphilippe.bernardy@gmail.com**20060910162443] 
[doc tweaks, including more precise equations for evaluate
Ross Paterson <ross@soi.city.ac.uk>**20060910115259] 
[Sync Data.ByteString with stable branch
Don Stewart <dons@cse.unsw.edu.au>**20060909050111
 
 This patch: 
     * hides the LPS constructor (its in .Base if you need it)
     * adds functions to convert between strict and lazy bytestrings
     * and adds readInteger
 
] 
[Typeable1 instances for STM and TVar
Ross Paterson <ross@soi.city.ac.uk>**20060904231425] 
[remove obsolete Hugs stuff
Ross Paterson <ross@soi.city.ac.uk>**20060904223944] 
[Cleaner isInfixOf suggestion from Ross Paterson
John Goerzen <jgoerzen@complete.org>**20060901143654] 
[New function isInfixOf that searches a list for a given sublist
John Goerzen <jgoerzen@complete.org>**20060831151556
 
 Example:
 
 isInfixOf "Haskell" "I really like Haskell." -> True
 isInfixOf "Ial" "I really like Haskell." -> False
 
 This function was first implemented in MissingH as MissingH.List.contains
] 
[Better doc on Data.Map.lookup: explain what the monad is for
jeanphilippe.bernardy@gmail.com**20060903133440] 
[fix hDuplicateTo on Windows
Simon Marlow <simonmar@microsoft.com>**20060901150016
 deja vu - I'm sure I remember fixing this before...
] 
[Improve documentation of atomically
simonpj@microsoft**20060714120207] 
[Add missing method genRange for StdGen (fixes #794)
simonpj@microsoft**20060707151901
 
        MERGE TO STABLE
 
 Trac #794 reports (correctly) that the implementation of StdGen
 only returns numbers in the range (0..something) rather than 
 (minBound, maxBound), which is what StdGen's genRange claims.
 
 This commit fixes the problem, by implementing genRange for StdGen
 (previously it just used the default method).
 
 
] 
[mark nhc98 import hack
Ross Paterson <ross@soi.city.ac.uk>**20060831125219] 
[remove some outdated comments
Simon Marlow <simonmar@microsoft.com>**20060831104200] 
[import Control.Arrow.ArrowZero to help nhc98's type checker
Malcolm.Wallace@cs.york.ac.uk**20060831101105] 
[remove Text.Regex(.Posix) from nhc98 build
Malcolm.Wallace@cs.york.ac.uk**20060831101016] 
[add Data.Foldable.{msum,asum}, plus tweaks to comments
Ross Paterson <ross@soi.city.ac.uk>**20060830163521] 
[fix doc typo
Ross Paterson <ross@soi.city.ac.uk>**20060830134123] 
[add Data.Foldable.{for_,forM_} and Data.Traversable.{for,forM}
Ross Paterson <ross@soi.city.ac.uk>**20060830133805
 
 generalizing Control.Monad.{forM_,forM}
] 
[Make length a good consumer
simonpj@microsoft*-20060508142726
 
 Make length into a good consumer.  Fixes Trac bug #707.
 
 (Before length simply didn't use foldr.)
 
] 
[Add Control.Monad.forM and forM_
Don Stewart <dons@cse.unsw.edu.au>**20060824081118
 
 flip mapM_ is more and more common, I find. Several suggestions have
 been made to add this, as foreach or something similar. This patch 
 does just that:
 
     forM  :: (Monad m) => [a] -> (a -> m b) -> m [b]
     forM_ :: (Monad m) => [a] -> (a -> m b) -> m ()
 
 So we can write:
      
     Prelude Control.Monad> forM_ [1..4] $ \x -> print x
     1
     2
     3
     4
 
] 
[Hide internal module from haddock in Data.ByteString
Don Stewart <dons@cse.unsw.edu.au>**20060828011515] 
[add advice on avoiding import ambiguities
Ross Paterson <ross@soi.city.ac.uk>**20060827170407] 
[expand advice on importing these modules
Ross Paterson <ross@soi.city.ac.uk>**20060827164044] 
[add Haddock marker
Ross Paterson <ross@soi.city.ac.uk>**20060827115140] 
[Clarify how one hides Prelude.catch
Don Stewart <dons@cse.unsw.edu.au>**20060826124346
 
 User feedback indicated that an example was required, of how to hide
 Prelude.catch, so add such an example to the docs
 
] 
[Workaround for OSes that don't have intmax_t and uintmax_t
Ian Lynagh <igloo@earth.li>**20060825134936
 OpenBSD (and possibly others) do not have intmax_t and uintmax_t types:
     http://www.mail-archive.com/haskell-prime@haskell.org/msg01548.html
 so substitute (unsigned) long long if we have them, otherwise
 (unsigned) long.
 
] 
[add docs for par
Simon Marlow <simonmar@microsoft.com>**20060825110610] 
[document minimal complete definition for Bits
Ross Paterson <ross@soi.city.ac.uk>**20060824140504] 
[C regex library bits have moved to the regex-posix package
Simon Marlow <simonmar@microsoft.com>**20060824132311] 
[Add shared Typeable support (ghc only)
Esa Ilari Vuokko <ei@vuokko.info>**20060823003126] 
[this should have been removed with the previous patch
Simon Marlow <simonmar@microsoft.com>**20060824121223] 
[remove Text.Regx & Text.Regex.Posix
Simon Marlow <simonmar@microsoft.com>**20060824094615
 These are subsumed by the new regex-base, regex-posix and regex-compat
 packages.
] 
[explicitly tag Data.ByteString rules with the FPS prefix.
Don Stewart <dons@cse.unsw.edu.au>**20060824041326] 
[Add spec rules for sections in Data.ByteString
Don Stewart <dons@cse.unsw.edu.au>**20060824012611] 
[Sync Data.ByteString with current stable branch, 0.7
Don Stewart <dons@cse.unsw.edu.au>**20060823143338] 
[add notes about why copyFile doesn't remove the target
Simon Marlow <simonmar@microsoft.com>**20060823095059] 
[copyFile: try removing the target file before opening it for writing
Simon Marlow <simonmar@microsoft.com>*-20060822121909] 
[copyFile: try removing the target file before opening it for writing
Simon Marlow <simonmar@microsoft.com>**20060822121909] 
[add alternative functors and extra instances
Ross Paterson <ross@soi.city.ac.uk>**20060821152151
 
 * Alternative class, for functors with a monoid
 * instances for Const
 * instances for arrows
] 
[generate Haddock docs on all platforms
Simon Marlow <simonmar@microsoft.com>**20060821131612] 
[remove extra comma from import
Ross Paterson <ross@soi.city.ac.uk>**20060819173954] 
[fix docs for withC(A)StringLen
Ross Paterson <ross@soi.city.ac.uk>**20060818170328] 
[use Haskell'98 compliant indentation in do blocks
Malcolm.Wallace@cs.york.ac.uk**20060818130810] 
[use correct names of IOArray operations for nhc98
Malcolm.Wallace@cs.york.ac.uk**20060818130714] 
[add mapMaybe and mapEither, plus WithKey variants
Ross Paterson <ross@soi.city.ac.uk>**20060817235041] 
[remove Text.Html from nhc98 build
Malcolm.Wallace@cs.york.ac.uk**20060817135502] 
[eliminate more HOST_OS tests
Ross Paterson <ross@soi.city.ac.uk>**20060815190609] 
[Hugs only: disable unused process primitives
Ross Paterson <ross@soi.city.ac.uk>**20060813184435
 
 These were the cause of Hugs bug #30, I think, and weren't used by Hugs anyway.
] 
[markup fix to Data.HashTable
Ross Paterson <ross@soi.city.ac.uk>**20060812103835] 
[revert removal of ghcconfig.h from package.conf.in
Ross Paterson <ross@soi.city.ac.uk>**20060812082702
 
 as it's preprocessed with -undef (pointed out by Esa Ilari Vuokko)
] 
[fix Data.HashTable for non-GHC
Ross Paterson <ross@soi.city.ac.uk>**20060811231521] 
[remove deprecated 'withObject'
Simon Marlow <simonmar@microsoft.com>**20060811152350] 
[Jan-Willem Maessen's improved implementation of Data.HashTable
Simon Marlow <simonmar@microsoft.com>**20060811151024
 Rather than incrementally enlarging the hash table, this version
 just does it in one go when the table gets too full.
] 
[Warning police: Make some prototypes from the RTS known
sven.panne@aedion.de**20060811144629] 
[Warning police: Removed useless catch-all clause
sven.panne@aedion.de**20060811142208] 
[reduce dependency on ghcconfig.h
Ross Paterson <ross@soi.city.ac.uk>**20060811124030
 
 The only remaining use is in cbits/dirUtils.h, which tests solaris2_HOST_OS
 
 (Also System.Info uses ghcplatform.h and several modules import MachDeps.h
 to get SIZEOF_* and ALIGNMENT_* from ghcautoconf.h)
] 
[(non-GHC only) track MArray interface change
Ross Paterson <ross@soi.city.ac.uk>**20060810182902] 
[move Text.Html to a separate package
Simon Marlow <simonmar@microsoft.com>**20060810113017] 
[bump version to 2.0
Simon Marlow <simonmar@microsoft.com>**20060810112833] 
[Remove deprecated Data.FiniteMap and Data.Set interfaces
Simon Marlow <simonmar@microsoft.com>**20060809153810] 
[move altzone test from ghc to base package
Ross Paterson <ross@soi.city.ac.uk>**20060809124259] 
[remove unnecessary #include "ghcconfig.h"
Ross Paterson <ross@soi.city.ac.uk>**20060809123812] 
[Change the API of MArray to allow resizable arrays
Simon Marlow <simonmar@microsoft.com>**20060809100548
 See #704
 
 The MArray class doesn't currently allow a mutable array to change its
 size, because of the pure function 
 
   bounds :: (HasBounds a, Ix i) => a i e -> (i,i)
 
 This patch removes the HasBounds class, and adds
 
   getBounds :: (MArray a e m, Ix i) => a i e -> m (i,i)
 
 to the MArray class, and
 
   bounds :: (IArray a e, Ix i) => a i e -> (i,i)
 
 to the IArray class.
 
 The reason that bounds had to be incorporated into the IArray class is
 because I couldn't make DiffArray work without doing this.  DiffArray
 acts as a layer converting an MArray into an IArray, and there was no
 way (that I could find) to define an instance of HasBounds for
 DiffArray.
] 
[deprecate this module.
Simon Marlow <simonmar@microsoft.com>**20060808100708] 
[add traceShow (see #474)
Simon Marlow <simonmar@microsoft.com>**20060807155545] 
[remove spurious 'extern "C" {'
Simon Marlow <simonmar@microsoft.com>**20060724160258] 
[Fix unsafeIndex for large ranges
Simon Marlow <simonmar@microsoft.com>**20060721100225] 
[disambiguate uses of foldr for nhc98 to compile without errors
Malcolm.Wallace@cs.york.ac.uk**20060711161614] 
[make Control.Monad.Instances compilable by nhc98
Malcolm.Wallace@cs.york.ac.uk**20060711160941] 
[breakpointCond
Lemmih <lemmih@gmail.com>**20060708055528] 
[UNDO: Merge "unrecognized long opt" fix from 6.4.2
Simon Marlow <simonmar@microsoft.com>**20060705142537
 This patch undid the previous patch, "RequireOrder: do not collect
 unrecognised options after a non-opt".  I asked Sven to revert it, but
 didn't get an answer.
 
 See bug #473.
] 
[Avoid strictness in accumulator for unpackFoldr
Don Stewart <dons@cse.unsw.edu.au>**20060703091806
 
 The seq on the accumulator for unpackFoldr will break in the presence of
 head/build rewrite rules. The empty list case will be forced, producing
 an exception. This is a known issue with seq and rewrite rules that we
 just stumbled on to.
 
] 
[Disable unpack/build fusion
Don Stewart <dons@cse.unsw.edu.au>**20060702083913
 
 unpack/build on bytestrings seems to trigger a bug when interacting with
 head/build fusion in GHC.List. The bytestring001 testcase catches it.
 
 I'll investigate further, but best to disable this for now (its not
 often used anyway).
 
 Note that with -frules-off or ghc 6.4.2 things are fine. It seems to
 have emerged with the recent rules changes.
 
] 
[Import Data.ByteString.Lazy, improve ByteString Fusion, and resync with FPS head
Don Stewart <dons@cse.unsw.edu.au>**20060701084345
 
 This patch imports the Data.ByteString.Lazy module, and its helpers,
 providing a ByteString implemented as a lazy list of strict cache-sized
 chunks. This type allows the usual lazy operations to be written on
 bytestrings, including lazy IO, with much improved space and time over
 the [Char] equivalents.
 
] 
[Wibble in docs for new ForeignPtr functionsn
Don Stewart <dons@cse.unsw.edu.au>**20060609075924] 
[comments for Applicative and Traversable
Ross Paterson <ross@soi.city.ac.uk>**20060622170436] 
[default to NoBuffering on Windows for a read/write text file
Simon Marlow <simonmar@microsoft.com>**20060622144446
 Fixes (works around) #679
] 
[remove dead code
Simon Marlow <simonmar@microsoft.com>**20060622144433] 
[clarify and expand docs
Simon Marlow <simonmar@microsoft.com>**20060622112911] 
[Add minView and maxView to Map and Set
jeanphilippe.bernardy@gmail.com**20060616180121] 
[add signature for registerDelay
Ross Paterson <ross@soi.city.ac.uk>**20060614114456] 
[a few doc comments
Ross Paterson <ross@soi.city.ac.uk>**20060613142704] 
[Optimised foreign pointer representation, for heap-allocated objects
Don Stewart <dons@cse.unsw.edu.au>**20060608015011] 
[Add the inline function, and many comments
simonpj@microsoft.com**20060605115814
 
 This commit adds the 'inline' function described in the
 related patch in the compiler.
 
 I've also added comments about the 'lazy' function.
 
] 
[small intro to exceptions
Ross Paterson <ross@soi.city.ac.uk>**20060525111604] 
[export breakpoint
Simon Marlow <simonmar@microsoft.com>**20060525090456] 
[Merge in changes from fps head. Highlights:
Don Stewart <dons@cse.unsw.edu.au>**20060525065012
 
     Wed May 24 15:49:38 EST 2006  sjanssen@cse.unl.edu
       * instance Monoid ByteString
 
     Wed May 24 15:04:04 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Rearange export lists for the .Char8 modules
 
     Wed May 24 14:59:56 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Implement mapAccumL and reimplement mapIndexed using loopU
 
     Wed May 24 14:47:32 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Change the implementation of the unfoldr(N) functions.
       Use a more compact implementation for unfoldrN and change it's behaviour
       to only return Just in the case that it actually 'overflowed' the N, so
       the boundary case of unfolding exactly N gives Nothing.
       Implement unfoldr and Lazy.unfoldr in terms of unfoldrN. Use fibonacci
       growth for the chunk size in unfoldr
 
     Wed May 24 08:32:29 EST 2006  sjanssen@cse.unl.edu
       * Add unfoldr to ByteString and .Char8
       A preliminary implementation of unfoldr.
 
     Wed May 24 01:39:41 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Reorder the export lists to better match the Data.List api
 
     Tue May 23 14:04:32 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * pack{Byte,Char} -> singleton. As per fptools convention
 
     Tue May 23 14:00:51 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * elemIndexLast -> elemIndexEnd
 
     Tue May 23 13:57:34 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * In the search for a more orthogonal api, we kill breakFirst/breakLast,
         which were of dubious value
 
     Tue May 23 12:24:09 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * Abolish elems. It's name implied it was unpack, but its type didn't. it made no sense
 
     Tue May 23 10:42:09 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Minor doc tidyup. Use haddock markup better.
 
     Tue May 23 11:00:31 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * Simplify the join() implementation. Spotted by Duncan.
 
] 
[add a way to ask the IO manager thread to exit
Simon Marlow <simonmar@microsoft.com>**20060524121823] 
[Sync with FPS head, including the following patches:
Don Stewart <dons@cse.unsw.edu.au>**20060520030436
         
     Thu May 18 15:45:46 EST 2006  sjanssen@cse.unl.edu
       * Export unsafeTake and unsafeDrop
 
     Fri May 19 11:53:08 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * Add foldl1'
 
     Fri May 19 13:41:24 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * Add fuseable scanl, scanl1 + properties
 
     Fri May 19 18:20:40 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * Spotted another chance to use unsafeTake,Drop (in groupBy)
 
     Thu May 18 09:24:25 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * More effecient findIndexOrEnd based on the impl of findIndex
 
     Thu May 18 09:22:49 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Eliminate special case in findIndex since it's handled anyway.
 
     Thu May 18 09:19:08 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Add unsafeTake and unsafeDrop
       These versions assume the n is in the bounds of the bytestring, saving
       two comparison tests. Then use them in varous places where we think this
       holds. These cases need double checking (and there are a few remaining
       internal uses of take / drop that might be possible to convert).
       Not exported for the moment.
 
     Tue May 16 23:15:11 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * Handle n < 0 in drop and splitAt. Spotted by QC.
 
     Tue May 16 22:46:22 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * Handle n <= 0 cases for unfoldr and replicate. Spotted by QC
 
     Tue May 16 21:34:11 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * mapF -> map', filterF -> filter'
 
] 
[haddock fix
Ross Paterson <ross@soi.city.ac.uk>**20060518154723] 
[simplify indexing in Data.Sequence
Ross Paterson <ross@soi.city.ac.uk>**20060518154316] 
[Move Eq, Ord, Show instances for ThreadId to GHC.Conc
Simon Marlow <simonmar@microsoft.com>**20060518113339
 Eliminates orphans.
] 
[Better error handling in the IO manager thread
Simon Marlow <simonmar@microsoft.com>**20060518113303
 In particular, handle EBADF just like rts/posix/Select.c, by waking up
 all the waiting threads.  Other errors are thrown, instead of just
 being ignored.
] 
[#define _REENTRANT 1  (needed to get the right errno on some OSs)
Simon Marlow <simonmar@microsoft.com>**20060518104151
 Part 2 of the fix for threaded RTS problems on Solaris and possibly
 *BSD (Part 1 was the same change in ghc/includes/Rts.h).
] 
[copyCString* should be in IO. Spotted by Tomasz Zielonka
Don Stewart <dons@cse.unsw.edu.au>**20060518012154] 
[add import Prelude to get dependencies right for Data/Fixed.hs
Duncan Coutts <duncan.coutts@worc.ox.ac.uk>**20060517222044
 Hopefully this fixes parallel builds.
] 
[Fix negative index handling in splitAt, replicate and unfoldrN. Move mapF, filterF -> map', filter' while we're here
Don Stewart <dons@cse.unsw.edu.au>**20060517020150] 
[Use our own realloc. Thus reduction functions (like filter) allocate on the Haskell heap. Makes around 10% difference.
Don Stewart <dons@cse.unsw.edu.au>**20060513051736] 
[Last two CInt fixes for 64 bit, and bracket writeFile while we're here
Don Stewart <dons@cse.unsw.edu.au>**20060512050750] 
[Some small optimisations, generalise the type of unfold
Don Stewart <dons@cse.unsw.edu.au>**20060510043309
 
     Tue May  9 22:36:29 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Surely the error function should not be inlined.
 
     Tue May  9 22:35:53 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Reorder memory writes for better cache locality.
 
     Tue May  9 23:28:09 EST 2006  Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
       * Generalise the type of unfoldrN
       
       The type of unfoldrN was overly constrained:
       unfoldrN :: Int -> (Word8 -> Maybe (Word8, Word8)) -> Word8 -> ByteString
       
       if we compare that to unfoldr:
       unfoldr :: (b -> Maybe (a, b)) -> b -> [a]
       
       So we can generalise unfoldrN to this type:
       unfoldrN :: Int -> (a -> Maybe (Word8, a)) -> a -> ByteString
       
       and something similar for the .Char8 version. If people really do want to
       use it a lot with Word8/Char then perhaps we should add a specialise pragma.
 
     Wed May 10 13:26:40 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
       * Add foldl', and thus a fusion rule for length . {map,filter,fold}, 
       that avoids creating an array at all if the end of the pipeline is a 'length' reduction
 
 **END OF DESCRIPTION***
 
 Place the long patch description above the ***END OF DESCRIPTION*** marker.
 The first line of this file will be the patch name.
 
 
 This patch contains the following changes:
 
 M ./Data/ByteString.hs -8 +38
 M ./Data/ByteString/Char8.hs -6 +12
] 
[portable implementation of WordPtr/IntPtr for non-GHC
Ross Paterson <ross@soi.city.ac.uk>**20060510001826
 
 plus much tweaking of imports to avoid cycles
] 
[add WordPtr and IntPtr types to Foreign.Ptr, with associated conversions
Simon Marlow <simonmar@microsoft.com>**20060509092606
 
 As suggested by John Meacham.  
 
 I had to move the Show instance for Ptr into GHC.ForeignPtr to avoid
 recursive dependencies.
] 
[add CIntPtr, CUIntPtr, CIntMax, CUIntMax types
Simon Marlow <simonmar@microsoft.com>**20060509092427] 
[add GHC.Dynamic
Simon Marlow <simonmar@microsoft.com>**20060509082739] 
[Two things. #if defined(__GLASGOW_HASKELL__) on INLINE [n] pragmas (for jhc). And careful use of INLINE on words/unwords halves runtime for those functions
Don Stewart <dons@cse.unsw.edu.au>**20060509023425] 
[Make length a good consumer
simonpj@microsoft**20060508142726
 
 Make length into a good consumer.  Fixes Trac bug #707.
 
 (Before length simply didn't use foldr.)
 
] 
[Trim imports
simonpj@microsoft**20060508142557] 
[Make unsafePerformIO lazy
simonpj@microsoft**20060508142507
 
 The stricteness analyser used to have a HACK which ensured that NOINLNE things
 were not strictness-analysed.  The reason was unsafePerformIO. Left to itself,
 the strictness analyser would discover this strictness for unsafePerformIO:
        unsafePerformIO:  C(U(AV))
 But then consider this sub-expression
        unsafePerformIO (\s -> let r = f x in 
                               case writeIORef v r s of (# s1, _ #) ->
                               (# s1, r #)
 The strictness analyser will now find that r is sure to be eval'd,
 and may then hoist it out.  This makes tests/lib/should_run/memo002
 deadlock.
 
 Solving this by making all NOINLINE things have no strictness info is overkill.
 In particular, it's overkill for runST, which is perfectly respectable.
 Consider
        f x = runST (return x)
 This should be strict in x.
 
 So the new plan is to define unsafePerformIO using the 'lazy' combinator:
 
        unsafePerformIO (IO m) = lazy (case m realWorld# of (# _, r #) -> r)
 
 Remember, 'lazy' is a wired-in identity-function Id, of type a->a, which is 
 magically NON-STRICT, and is inlined after strictness analysis.  So
 unsafePerformIO will look non-strict, and that's what we want.
 
] 
[Sync with FPS head.
Don Stewart <dons@cse.unsw.edu.au>**20060508122322
 
 Mon May  8 10:40:14 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
   * Fix all uses for Int that should be CInt or CSize in ffi imports.
   Spotted by Igloo, dcoutts
 
 Mon May  8 16:09:41 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
   * Import nicer loop/loop fusion rule from ghc-ndp
 
 Mon May  8 17:36:07 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
   * Fix stack leak in split on > 60M strings
 
 Mon May  8 17:50:13 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
   * Try same fix for stack overflow in elemIndices
 
] 
[Fix all uses for Int that should be CInt or CSize in ffi imports. Spotted by Duncan and Ian
Don Stewart <dons@cse.unsw.edu.au>**20060508010311] 
[Fixed import list syntax
Sven Panne <sven.panne@aedion.de>**20060507155008] 
[Faster filterF, filterNotByte
dons@cse.unsw.edu.au**20060507042301] 
[Much faster find, findIndex. Hint from sjanssen
dons@cse.unsw.edu.au**20060507033048] 
[Merge "unrecognized long opt" fix from 6.4.2
Sven Panne <sven.panne@aedion.de>**20060506110519] 
[
dons@cse.unsw.edu.au**20060506061029
 Sat May  6 13:01:34 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
   * Do loopU realloc on the Haskell heap. And add a really tough stress test
 
 Sat May  6 12:28:58 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
   * Use simple, 3x faster concat. Plus QC properties. Suggested by sjanssen and dcoutts
 
 Sat May  6 15:59:31 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
   * dcoutt's packByte bug squashed
   
   With inlinePerformIO, ghc head was compiling:
   
    packByte 255 `compare` packByte 127
   
   into roughly
   
    case mallocByteString 2 of
        ForeignPtr f internals ->
             case writeWord8OffAddr# f 0 255 of _ ->
             case writeWord8OffAddr# f 0 127 of _ ->
             case eqAddr# f f of
                    False -> case compare (GHC.Prim.plusAddr# f 0)
                                          (GHC.Prim.plusAddr# f 0)
   
   which is rather stunning. unsafePerformIO seems to prevent whatever
   magic inlining was leading to this. Only affected the head.
   
] 
[Add array fusion versions of map, filter and foldl
dons@cse.unsw.edu.au**20060505060858
 
 This patch adds fusable map, filter and foldl, using the array fusion
 code for unlifted, flat arrays, from the Data Parallel Haskell branch,
 after kind help from Roman Leshchinskiy, 
 
 Pipelines of maps, filters and folds should now need to walk the
 bytestring once only, and intermediate bytestrings won't be constructed.
 
] 
[fix for non-GHC
Ross Paterson <ross@soi.city.ac.uk>**20060504093044] 
[use bracket in appendFile (like writeFile)
Ross Paterson <ross@soi.city.ac.uk>**20060504091528] 
[writeFile: close the file on error
Simon Marlow <simonmar@microsoft.com>**20060504084505
 Suggested by Ross Paterson, via Neil Mitchell
 
] 
[Sync with FPS head
dons@cse.unsw.edu.au**20060503105259
 
 This patch brings Data.ByteString into sync with the FPS head.
 The most significant of which is the new Haskell counting sort.
 
 Changes:
 
 Sun Apr 30 18:16:29 EST 2006  sjanssen@cse.unl.edu
   * Fix foldr1 in Data.ByteString and Data.ByteString.Char8
 
 Mon May  1 11:51:16 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
   * Add group and groupBy. Suggested by conversation between sjanssen and petekaz on #haskell
 
 Mon May  1 16:42:04 EST 2006  sjanssen@cse.unl.edu
   * Fix groupBy to match Data.List.groupBy.
 
 Wed May  3 15:01:07 EST 2006  sjanssen@cse.unl.edu
   * Migrate to counting sort.
   
   Data.ByteString.sort used C's qsort(), which is O(n log n).  The new algorithm 
   is O(n), and is faster for strings larger than approximately thirty bytes.  We
   also reduce our dependency on cbits!
 
] 
[improve performance of Integer->String conversion
Simon Marlow <simonmar@microsoft.com>**20060503113306
 See
  http://www.haskell.org//pipermail/libraries/2006-April/005227.html
 
 Submitted by: bertram.felgenhauer@googlemail.com
 
 
] 
[inline withMVar, modifyMVar, modifyMVar_
Simon Marlow <simonmar@microsoft.com>**20060503111152] 
[Fix string truncating in hGetLine -- it was a pasto from Simon's code
Simon Marlow <simonmar@microsoft.com>**20060503103504
 (from Don Stewart)
] 
[Merge in Data.ByteString head. Fixes ByteString+cbits in hugs
Don Stewart <dons@cse.unsw.edu.au>**20060429040733] 
[Import Data.ByteString from fps 0.5.
Don Stewart <dons@cse.unsw.edu.au>**20060428130718
 Fast, packed byte vectors, providing a better PackedString.
 
] 
[fix previous patch
Ross Paterson <ross@soi.city.ac.uk>**20060501154847] 
[fixes for non-GHC
Ross Paterson <ross@soi.city.ac.uk>**20060501144322] 
[fix imports for mingw32 && !GHC
Ross Paterson <ross@soi.city.ac.uk>**20060427163248] 
[RequireOrder: do not collect unrecognised options after a non-opt
Simon Marlow <simonmar@microsoft.com>**20060426121110
 The documentation for RequireOrder says "no option processing after
 first non-option", so it doesn't seem right that we should process the
 rest of the arguments to collect the unrecognised ones.  Presumably
 the client wants to know about the unrecognised options up to the
 first non-option, and will be using a different option parser for the
 rest of the command line.
 
 eg. before:
 
 Prelude System.Console.GetOpt> getOpt' RequireOrder [] ["bar","--foo"]
 ([],["bar","--foo"],["--foo"],[])
 
 after:
 
 Prelude System.Console.GetOpt> getOpt' RequireOrder [] ["bar","--foo"]
 ([],["bar","--foo"],[],[])
] 
[fix for Haddock 0.7
Ashley Yakeley <ashley@semantic.org>**20060426072521] 
[add Data.Fixed module
Ashley Yakeley <ashley@semantic.org>**20060425071853] 
[add instances
Ross Paterson <ross@soi.city.ac.uk>**20060424102146] 
[add superclasses to Applicative and Traversable
Ross Paterson <ross@soi.city.ac.uk>**20060411144734
 
 Functor is now a superclass of Applicative, and Functor and Foldable
 are now superclasses of Traversable.  The new hierarchy makes clear the
 inclusions between the classes, but means more work in defining instances.
 Default definitions are provided to help.
] 
[add Functor and Monad instances for Prelude types
Ross Paterson <ross@soi.city.ac.uk>**20060410111443] 
[GHC.Base.breakpoint
Lemmih <lemmih@gmail.com>**20060407125827] 
[Track the GHC source tree reorganisation
Simon Marlow <simonmar@microsoft.com>**20060407041631] 
[in the show instance for Exception, print the type of dynamic exceptions
Simon Marlow <simonmar@microsoft.com>**20060406112444
 Unfortunately this requires some recursve module hackery to get at 
 the show instance for Typeable.
] 
[implement ForeignEnvPtr, newForeignPtrEnv, addForeignPtrEnv for GHC
Simon Marlow <simonmar@microsoft.com>**20060405155448] 
[add  forkOnIO :: Int -> IO () -> IO ThreadId
Simon Marlow <simonmar@microsoft.com>**20060327135018] 
[Rework previous: not a gcc bug after all
Simon Marlow <simonmar@microsoft.com>**20060323161229
 It turns out that we were relying on behaviour that is undefined in C,
 and undefined behaviour in C means "the compiler can do whatever the
 hell it likes with your entire program".  So avoid that.
] 
[work around a gcc 4.1.0 codegen bug in -O2 by forcing -O1 for GHC.Show
Simon Marlow <simonmar@microsoft.com>**20060323134514
 See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26824
] 
[commit mysteriously missing parts of "runIOFastExit" patch
Simon Marlow <simonmar@microsoft.com>**20060321101535] 
[add runIOFastExit :: IO a -> IO a
Simon Marlow <simonmar@microsoft.com>**20060320124333
 Similar to runIO, but calls stg_exit() directly to exit, rather than
 shutdownHaskellAndExit().  Needed for running GHCi in the test suite.
] 
[Fix a broken invariant
Simon Marlow <simonmar@microsoft.com>**20060316134151
 Patch from #694,  for the problem "empty is an identity for <> and $$" is
 currently broken by eg. isEmpty (empty<>empty)"
] 
[Add unsafeSTToIO :: ST s a -> IO a
Simon Marlow <simonmar@microsoft.com>**20060315160232
 Implementation for Hugs is missing, but should be easy.  We need this
 for the forthcoming nested data parallelism implementation.
] 
[Added 'alter'
jeanphilippe.bernardy@gmail.com**20060315143539
 Added 'alter :: (Maybe a -> Maybe a) -> k -> Map k a -> Map k a' to IntMap and Map
 This addresses ticket #665
] 
[deprecate FunctorM in favour of Foldable and Traversable
Ross Paterson <ross@soi.city.ac.uk>**20060315092942
 as discussed on the libraries list.
] 
[Simplify Eq, Ord, and Show instances for UArray
Simon Marlow <simonmar@microsoft.com>**20060313142701
 The Eq, Ord, and Show instances of UArray were written out longhand
 with one instance per element type.  It is possible to condense these
 into a single instance for each class, at the expense of using more
 extensions (non-std context on instance declaration).
 
 Suggestion by: Frederik Eaton <frederik@ofb.net>
 
] 
[Oops typo in intSet notMember 
jeanphilippe.bernardy@gmail.com**20060311224713] 
[IntMap lookup now returns monad instead of Maybe.
jeanphilippe.bernardy@gmail.com**20060311224502] 
[Added notMember to Data.IntSet and Data.IntMap
jeanphilippe.bernardy@gmail.com**20060311085221] 
[add Data.Set.notMember and Data.Map.notMember
John Meacham <john@repetae.net>**20060309191806] 
[addToClockTime: handle picoseconds properly
Simon Marlow <simonmar@microsoft.com>**20060310114532
 fixes #588
] 
[make head/build rule apply to all types, not just Bool.
John Meacham <john@repetae.net>**20060303045753] 
[Avoid overflow when normalising clock times
Ian Lynagh <igloo@earth.li>**20060210144638] 
[Years have 365 days, not 30*365
Ian Lynagh <igloo@earth.li>**20060210142853] 
[declare blkcmp() static
Simon Marlow <simonmar@microsoft.com>**20060223134317] 
[typo in comment in Foldable class
Ross Paterson <ross@soi.city.ac.uk>**20060209004901] 
[simplify fmap
Ross Paterson <ross@soi.city.ac.uk>**20060206095048] 
[update ref in comment
Ross Paterson <ross@soi.city.ac.uk>**20060206095139] 
[Give -foverlapping-instances to Data.Typeable
simonpj@microsoft**20060206133439
 
 For some time, GHC has made -fallow-overlapping-instances "sticky": 
 any instance in a module compiled with -fallow-overlapping-instances
 can overlap when imported, regardless of whether the importing module
 allows overlap.  (If there is an overlap, both instances must come from
 modules thus compiled.)
 
 Instances in Data.Typeable might well want to be overlapped, so this
 commit adds the flag to Data.Typeable (with an explanatory comment)
 
 
] 
[Add -fno-bang-patterns to modules using both bang and glasgow-exts
simonpj@microsoft.com**20060203175759] 
[When splitting a bucket, keep the contents in the same order
Simon Marlow <simonmar@microsoft.com>**20060201130427
 To retain the property that multiple inserts shadow each other
 (see ticket #661, test hash001)
] 
[add foldr/build optimisation for take and replicate
Simon Marlow <simonmar@microsoft.com>**20060126164603
 This allows take to be deforested, and improves performance of
 replicate and replicateM/replicateM_.  We have a separate problem that
 means expressions involving [n..m] aren't being completely optimised
 because eftIntFB isn't being inlined but otherwise the results look
 good.  
 
 Sadly this has invalidated a number of the nofib benchmarks which were
 erroneously using take to duplicate work in a misguided attempt to
 lengthen their runtimes (ToDo).
] 
[Generate PrimopWrappers.hs with Haddock docs
Simon Marlow <simonmar@microsoft.com>**20060124131121
 Patch originally from Dinko Tenev <dinko.tenev@gmail.com>, modified
 to add log message by me.
] 
[[project @ 2006-01-19 14:47:15 by ross]
ross**20060119144715
 backport warning avoidance from Haddock
] 
[[project @ 2006-01-18 11:45:47 by malcolm]
malcolm**20060118114547
 Fix import of Ix for nhc98.
] 
[[project @ 2006-01-17 09:38:38 by ross]
ross**20060117093838
 add Ix instance for GeneralCategory.
] 
[TAG Initial conversion from CVS complete
John Goerzen <jgoerzen@complete.org>**20060112154126] 
Patch bundle hash:
941e513ad021a22005927a8db574b8359965dba0