1 <?xml version="1.0" encoding="iso-8859-1"?>
2 <sect1 id="release-6-6">
3 <title>Release notes for version 6.6</title>
6 <title>User-visible compiler changes</title>
11 when you compile with <option>-threaded</option>, you now get
12 an RTS flag <option>-N</option> that allows you to specify the
13 number of OS threads that GHC should use. Defaults to 1.
14 See <xref linkend="sec-using-smp" /> and <xref
15 linkend="lang-parallel" />.
20 GHC's modules are now also bundled into a
21 <literal>ghc</literal> package, allowing programs to make use
22 of GHC as a library. The interface has not yet been properly
23 designed, so is subject to change.
28 GHC now handles impredicative polymorphism and there are
29 changes to the way scoped type variables work; see
30 <ulink url="http://www.haskell.org/pipermail/glasgow-haskell-users/2006-January/009565.html"> Simon's e-mail</ulink>
36 GHC now supports bang patterns to require a function is strict
37 in a given argument, e.g.
39 f (!x, y) = [x,y]</programlisting>
42 f (x, y) | x `seq` False = undefined
43 | otherwise = [x,y]</programlisting>
48 The restriction that you cannot use two packages together if
49 they contain a module with the same name has been removed.
50 In implementation terms, the package name is now included in
51 every exported symbol name in the object file, so that
52 modules with the same name in different packages do not
53 clash. See <xref linkend="package-overlaps" />.
58 GHC now treats source files as UTF-8 (ASCII is a strict
59 subset of UTF-8, so ASCII source files will continue to
60 work as before). However, invalid UTF-8 sequences are
61 ignored in comments, so ASCII code with comments in, for
62 example, Latin-1 will also work.
67 GADTs can now use record syntax. Also, if the datatype could
68 have been declared with Haskell 98 syntax then deriving
69 clauses are permitted. For more info see <xref linkend="gadt" />.
74 There is a new pragma <literal>LANGUAGE</literal> which allows
75 extensions to be specified portably, i.e. without having to
76 resort to the <literal>OPTIONS_GHC</literal> pragma and giving
77 GHC-specific options. The arguments to the pragma are the same
78 extensions that Cabal knows about. More info in
79 <xref linkend="language-pragma" />.
84 When you use <command>ghc --make</command>, GHC will now take
85 the executable filename from the name of the file containing
86 the <literal>Main</literal> module rather than using
87 <filename>a.out</filename>. The <filename>.exe</filename>
88 extension is appended on Windows, and it can of course be
89 overridden with <option>-o</option>.
94 GHC's garbage collector now deals more intelligently with
95 mutable data, so you mostly no longer need to worry about GC
96 performance when a lot of memory is taken up by
97 <literal>STArray</literal>s, <literal>IOArray</literal>s,
98 <literal>STRef</literal>s or <literal>IORef</literal>s.
103 GHC now allows more generalisation when typing mutually
104 recursive bindings, resulting in more programs being accepted.
105 See <xref linkend="typing-binds" /> for more details.
110 The rules for instance declarations have been further relaxed.
111 You are now permitted to have instances whose heads contain
112 only type variables, e.g.
114 instance C a</programlisting>
115 and instances whose constraints are not only type variables,
118 instance C2 Int a => C3 [a] b</programlisting>
119 For more details, see <xref linkend="instance-rules" />.
124 The following flags (and, where appropriate, their inverses)
125 used to be static (can only be given on
126 the command line) but are now dynamic (can also be given in
127 a <literal>GHC_OPTIONS</literal> pragma or with
128 <literal>:set</literal> in GHCi):
130 <option>-hcsuf</option>,
131 <option>-hidir</option>,
132 <option>-hisuf</option>,
134 <option>-odir</option>,
135 <option>-ohi</option>,
136 <option>-osuf</option>,
137 <option>-keep-hc-file</option>,
138 <option>-keep-s-file</option>,
139 <option>-keep-raw-s-file</option>,
140 <option>-keep-tmp-files</option>,
141 <option>-tmpdir</option>,
143 <option>-package</option>,
144 <option>-hide-package</option>,
145 <option>-ignore-package</option>,
146 <option>-package-conf</option>,
147 <option>-no-user-package-conf</option>,
148 <option>-fcontext-stack</option>,
149 <option>-fexcess-precision</option>,
150 <option>-fignore-asserts</option>,
151 <option>-fignore-interface-pragmas</option>,
153 <option>-framework</option>,
154 <option>-framework-path</option>,
157 <option>-main-is</option>,
158 <option>-no-hs-main</option>,
159 <option>-split-objs</option>,
160 <option>-pgmL</option>,
161 <option>-pgmP</option>,
162 <option>-pgmc</option>,
163 <option>-pgma</option>,
164 <option>-pgml</option>,
165 <option>-pgmdll</option>,
166 <option>-pgmdep</option>,
167 <option>-pgmF</option>,
168 <option>-optl</option>,
169 <option>-optdll</option>,
170 <option>-optdep</option>,
171 <option>-fno-asm-mangling</option>.
172 See <xref linkend="static-dynamic-flags" /> for more on
173 the meaning of static and dynamic flags, and
174 <xref linkend="flag-reference" /> for more on the flags
180 There is a new flag <option>-x</option> for overriding the
181 default behaviour for source files; see
182 <xref linkend="overriding-suffixes" /> details.
187 The <option>-fglobalise-toplev-names</option>
188 flag has been removed.
193 The <option>-fallow-overlapping-instances</option> flag is
194 implied by the <option>-fallow-incoherent-instances</option>
200 The directory that the <filename>foo_stub.c</filename> and
201 <filename>foo_stub.h</filename> files are put in can now be
202 controlled with the <option>-stubdir</option> flag.
203 See <xref linkend="options-output" /> for more details.
208 When the <option>-fno-implicit-prelude</option> is given,
209 the equality test performed when pattern matching against an
210 overloaded numeric literal now uses the
211 <literal>(==)</literal> in scope, rather than the one from
212 <literal>Prelude</literal>. Likewise, the subtraction and
213 inequality test performed when pattern matching against
214 <literal>n+k</literal> patterns uses the
215 <literal>(-)</literal> and <literal>(>=)</literal> in scope.
220 Another change to <option>-fno-implicit-prelude</option>:
221 with the exception of the arrow syntax, the types of
222 functions used by sugar (such as do notation, numeric
223 literal patterns) need not match the types of the
224 <literal>Prelude</literal> functions normally used.
229 The <literal>InstalledPackageInfo</literal> syntax has
231 instead of <literal>extra-libs</literal> we have
232 <literal>extra-libraries</literal>,
233 instead of <literal>extra-hugs-opts</literal> we have
234 <literal>hugs-options</literal>,
235 instead of <literal>extra-cc-opts</literal> we have
236 <literal>cc-options</literal>,
237 instead of <literal>extra-ld-opts</literal> we have
238 <literal>ld-options</literal>,
239 and instead of <literal>extra-frameworks</literal> we have
240 <literal>frameworks</literal>.
241 See <xref linkend="installed-pkg-info" /> for details.
246 If you <literal>newtype</literal> the IO monad, e.g.
248 newtype MyIO a = MyIO (IO a)</programlisting>
249 then GHC will now allow you to have FFI calls return
250 <literal>MyIO <replaceable>t</replaceable></literal>
252 <literal>IO <replaceable>t</replaceable></literal>.
257 By default, pattern bindings in GHC are now monomorphic.
258 This means that some valid Haskell 98 programs will get
259 rejected, but we believe they will be few in number.
260 To revert to the old behaviour use the
261 <option>-fno-mono-pat-binds</option> flag.
262 More details are in <xref linkend="options-language" />.
267 GHCi already does more defaulting than Haskell 98 so that, for
268 example, <literal>reverse []</literal> shows a result rather
269 than giving an ambiguous type variable error. There is now a
270 flag <option>-fextended-default-rules</option> to use these
271 defaulting rules with GHC too.
272 More details are in <xref linkend="extended-default-rules" />.
277 You can now give both class and instance declarations in
278 <filename>.hs-boot</filename> files. More details in
279 <xref linkend="mutual-recursion" />.
284 It is now possible, with the <literal>-I</literal> RTS flag,
285 to control the amount of idle time that happens before a major
291 The old syntax for FFI declarations (deprecated since 5.04)
292 is no longer accepted.
297 The <option>-split-objs</option> flag can now be used with
298 <option>--make</option>, and hence can be used by cabal.
305 <title>GHCi changes</title>
310 GHCi now allows tab completion of in-scope names and modules
311 on platforms that use readline (i.e. not Windows).
316 GHCi now has a <literal>:main</literal> command that allows
317 you to call the <literal>main</literal> function with
318 command-line arguments.
319 See <xref linkend="ghci-commands" /> for more information.
324 GHCi now has <literal>:ctags</literal> and
325 <literal>:etags</literal> commands to generate tags files for
326 vi-style and emacs-style editors respectively.
327 See <xref linkend="ghci-commands" /> for more information.
334 <title>Libraries</title>
336 Libraries are now divided into core libraries (those that are
337 necessary to build GHC) and extra libraries. Decoupling the extra
338 libraries means that they can release independently of GHC
339 releases, and makes development builds of GHC quicker as they no
340 longer need to build unnecessary libraries.
344 The hslibs libraries have finally been removed.
349 <title>Core Libraries</title>
355 Version number 2.0 (was 1.0).
360 We now have <literal>Read</literal> and
361 <literal>Show</literal> instances for up to 15-tuples (used
362 to be up to 5-tuples).
367 New module <literal>Control.Applicative</literal> that
368 describes a structure intermediate between a functor and
369 a monad: it provides pure expressions and sequencing, but
375 <literal>Control.Exception</literal> now exports
376 <literal>bracketOnError</literal>, which behaves like
377 <literal>bracket</literal> but only runs the final
378 action if the main action raised an error.
383 There is a new module
384 <literal>Control.Monad.Instances</literal> which
385 provides <literal>Monad</literal> and
386 <literal>Functor</literal> instances for
387 <literal>((->) r)</literal> (were in
388 <literal>mtl</literal>'s
389 <literal>Control.Monad.Reader</literal>),
390 a <literal>Functor</literal> instance for
391 <literal>(Either a)</literal> (was in <literal>mtl</literal>'s
392 <literal>Control.Monad.Error</literal>) and a
393 <literal>Functor</literal> instance for
394 <literal>((,) a)</literal> (new).
399 The <literal>MonadFix</literal> instance for
400 <literal>((->) r)</literal> is now in
401 <literal>Control.Monad.Fix</literal> (was in
402 <literal>mtl</literal>'s
403 <literal>Control.Monad.Reader</literal>).
408 <literal>Control.Monad.ST</literal> now exports
409 <literal>unsafeSTToIO</literal>.
414 The <literal>HasBounds</literal> class has been removed from
415 <literal>Data.Array.Base</literal>, and its
416 <literal>bounds</literal> method is now in the
417 <literal>IArray</literal> class. The
418 <literal>MArray</literal> class
419 has also gained a method <literal>getBounds</literal>.
424 <literal>Data.Array.Base</literal> now provides an
425 <literal>MArray (STArray s) e (Lazy.ST s)</literal>
431 <literal>Data.Array.Storable</literal> now exports a
432 function <literal>unsafeForeignPtrToStorableArray</literal>.
437 The new <literal>Data.ByteString</literal> hierarchy
438 provides time and space-efficient byte vectors.
439 The old <literal>Data.PackedString</literal> module is now
440 deprecated as a result, although there is not yet a
441 replacement if you need full unicode support.
446 <literal>GHC.Exts</literal> now provides a function
447 <literal>inline</literal> which, provided the RHS is visible
448 to the compiler, forcibly inlines its argument.
449 Otherwise, it acts like <literal>id</literal>.
454 <literal>GHC.Exts</literal> now provides a function
455 <literal>lazy</literal> which forces GHC to think that its
456 argument is lazy in its first argument.
461 <literal>Data.FiniteMap</literal> has been removed
462 (deprecated since 6.4). Use <literal>Data.Map</literal>
468 <literal>Data.Char</literal> now exports
469 <literal>isLetter</literal>,
470 <literal>isMark</literal>,
471 <literal>isNumber</literal>,
472 <literal>isPunctuation</literal>,
473 <literal>isSymbol</literal>,
474 <literal>isSeparator</literal>,
475 <literal>isAsciiUpper</literal>,
476 <literal>isAsciiLower</literal> and
477 <literal>toTitle</literal>.
478 It also exports a function
479 <literal>generalCategory</literal> that tells you the
480 category of a character in terms of a datatype
481 <literal>GeneralCategory</literal>.
486 <literal>Data.Dynamic</literal> now exports a function
487 <literal>dynTypeRep</literal>.
492 There is a new module <literal>Data.Eq</literal> which
493 just exports the <literal>Eq</literal> class.
494 Likewise, a new module <literal>Data.Ord</literal>
495 exports the <literal>Ord</literal> class, as well as the
496 handy <literal>comparing</literal> function.
501 There is a new module <literal>Data.Fixed</literal>
502 providing fixed-precision arithmetic.
507 There is a new module <literal>Data.Foldable</literal>
508 providing a class for foldable datatypes. It gives instances
509 for <literal>Maybe</literal>, <literal>[]</literal> and
510 <literal>Array i</literal>.
515 There is a new module <literal>Data.Traversable</literal>
516 providing a class for data structures that can be traversed
517 from left to right. It gives instances
518 for <literal>Maybe</literal>, <literal>[]</literal> and
519 <literal>Array i</literal>.
524 <literal>Data.FunctorM</literal> has been deprecated;
525 use <literal>Data.Foldable</literal> and
526 <literal>Data.Traversable</literal> instead.
531 The <literal>toConstr</literal> definitions for tuples in
532 <literal>Data.Generics.Instances</literal> now actually
533 evaluate their arguments to tuples before returning
539 <literal>Data.IntMap</literal> now exports
540 <literal>notMember</literal>,
541 <literal>alter</literal>,
542 <literal>mapMaybe</literal>,
543 <literal>mapMaybeWithKey</literal>,
544 <literal>mapEither</literal> and
545 <literal>mapEitherWithKey</literal>.
546 It also has <literal>Monoid</literal>,
547 <literal>Foldable</literal> and <literal>Read</literal>
553 <literal>Data.IntSet</literal> now exports
554 <literal>notMember</literal>. It also has
555 <literal>Monoid</literal> and <literal>Read</literal>
561 <literal>Data.Map</literal> now exports
562 <literal>notMember</literal>,
563 <literal>alter</literal>,
564 <literal>mapMaybe</literal>,
565 <literal>mapMaybeWithKey</literal>,
566 <literal>mapEither</literal>,
567 <literal>mapEitherWithKey</literal>,
568 <literal>minView</literal> and
569 <literal>maxView</literal>.
570 It also has <literal>Monoid</literal>,
571 <literal>Traversable</literal>, <literal>Foldable</literal>
572 and <literal>Read</literal> instances.
577 <literal>Data.Set</literal> now exports
578 <literal>notMember</literal>,
579 <literal>minView</literal> and
580 <literal>maxView</literal>.
581 It also has <literal>Monoid</literal>,
582 <literal>Foldable</literal>
583 and <literal>Read</literal> instances.
587 The old, deprecated (since 6.4) interface consisting of
588 <literal>emptySet</literal>,
589 <literal>mkSet</literal>,
590 <literal>setToList</literal>,
591 <literal>unitSet</literal>,
592 <literal>elementOf</literal>,
593 <literal>isEmptySet</literal>,
594 <literal>cardinality</literal>,
595 <literal>unionManySets</literal>,
596 <literal>minusSet</literal>,
597 <literal>mapSet</literal>,
598 <literal>intersect</literal>,
599 <literal>addToSet</literal> and
600 <literal>delFromSet</literal> has been removed.
605 <literal>Data.Monoid</literal> no longer contains the
606 <literal>Monoid</literal>
607 instances for <literal>Map</literal>,
608 <literal>IntMap</literal>, <literal>Set</literal> and
609 <literal>IntSet</literal>. They have been moved to their own
610 modules, as above. The <literal>(a -> a)</literal> instance
611 has been replaced with a
612 <literal>Monoid b => Monoid (a -> b)</literal> instance.
613 The module also now exports
614 <literal>Dual</literal>,
615 <literal>Endo</literal>,
616 <literal>All</literal>,
617 <literal>Any</literal>,
618 <literal>Sum</literal> and
619 <literal>Product</literal> types, and
620 <literal>Monoid</literal> instances for them.
625 There is a new module <literal>Data.Sequence</literal>
626 for finite sequences. The <literal>Data.Queue</literal>
627 module is now deprecated in favour of this faster, more
628 featureful replacement.
633 <literal>Data.Tree</literal> now has
634 <literal>Data</literal>, <literal>Typeable</literal>,
635 <literal>Traversable</literal> and
636 <literal>Foldable</literal>
638 <literal>Tree</literal> datatype.
643 <literal>Data.Typeable</literal> now uses
644 <option>-fallow-overlapping-instances</option>, so the
645 generic instances can be overriden for your own datatypes.
650 <literal>Debug.Trace</literal> now exports
651 <literal>traceShow</literal>, which is the same as
652 <literal>trace</literal> except its first argument can be
653 any showable thing rather than being required to be a
659 <literal>Foreign.C.Types</literal> now also defines
660 <literal>CIntPtr</literal>,
661 <literal>CUIntPtr</literal>,
662 <literal>CIntMax</literal> and
663 <literal>CUIntMax</literal>.
668 <literal>Foreign.ForeignPtr</literal> now exports
669 <literal>FinalizerEnvPtr</literal>,
670 <literal>newForeignPtrEnv</literal> and
671 <literal>addForeignPtrFinalizerEnv</literal>.
672 Together, these allow the use of finalizers which are passed
673 an additional environment parameter.
678 <literal>Foreign.Marshal.Utils</literal> no longer exports
679 the <literal>withObject</literal> function, deprecated since
680 5.04; use <literal>with</literal> instead.
685 Foreign.Ptr now also defines
686 <literal>IntPtr</literal>,
687 <literal>ptrToIntPtr</literal>,
688 <literal>intPtrToPtr</literal>,
689 <literal>WordPtr</literal>,
690 <literal>ptrToWordPtr</literal> and
691 <literal>wordPtrToPtr</literal>.
696 There are now <literal>Bounded</literal> instances for up to
697 15-tuples (used to be up to 4-tuples).
702 The <literal>Text.Html</literal> and
703 <literal>Text.Html.BlockTable</literal> modules have now
704 been removed, with the new <literal>html</literal> and
705 <literal>xhtml</literal> packages providing replacements.
710 <literal>Text.Read</literal> now exports a function
711 <literal>parens</literal> which parses a value in an
712 arbitrary number of parentheses.
717 The <literal>ForeignPtr</literal> datatype has been altered
718 to make it more efficient. There are also new functions
719 <literal>mallocPlainForeignPtr</literal> and
720 <literal>mallocPlainForeignPtrBytes</literal> which
721 do not allow you to attach a finalizer to the
722 <literal>ForeignPtr</literal>.
727 The <literal>Text.Regex</literal> and
728 <literal>Text.Regex.Posix</literal> modules have been removed.
729 Instead, use the new <literal>regex-compat</literal> package
730 for a drop-in <literal>Text.Regex</literal> replacement, or
731 the new library in the new <literal>regex-posix</literal>
743 Version number 1.1.5 (was 1.1.4).
748 Support for JHC, symmetric to the support for the other
749 implementations, has been added throughout.
754 Support for object splitting and building in-place
755 has been added throughout.
760 Added a <filename>debianTemplate</filename> directory with
761 templates for building Debian packages from Cabal packages.
766 Added <filename>cabal-setup</filename>, a user interface to
767 building and installing Cabal packages.
772 Added <filename>cabal-install</filename>, an automated
773 installer for cabal packages.
778 There is now a <literal>Network.Hackage</literal> hierarchy
779 for code needed by hackage, the package server.
784 There are now modules
785 <literal>Distribution.Simple.<replaceable>compiler</replaceable></literal>
786 for each of <literal>GHC</literal>, <literal>NHC</literal>,
787 <literal>Hugs</literal> and <literal>JHC</literal>.
788 The <literal>Distribution.Simple.Build</literal> and
789 <literal>Distribution.Simple.Install</literal> modules have
790 shrunk correspondingly.
795 <literal>Distribution.GetOpt</literal> is no longer a
801 <literal>Distribution.Simple</literal> exports a function
802 <literal>defaultMainArgs</literal>, which is identical to
803 <literal>defaultMain</literal> except that the arguments are
804 given as a list of strings rather than being retrieved with
805 <literal>getArgs</literal>.
810 <literal>Distribution.Simple.Configure</literal>
812 <literal>LocalBuildInfo</literal>,
814 <literal>configDependency</literal> and
815 <literal>configCompilerAux</literal>.
820 <literal>Distribution.Simple.LocalBuildInfo</literal> now
821 exports <literal>mkHaddockDir</literal>,
822 <literal>distPref</literal>,
823 <literal>srcPref</literal>,
824 <literal>autogenModulesDir</literal> and
825 <literal>mkIncludeDir</literal>.
830 <literal>Distribution.PackageDescription</literal> now
831 exports <literal>haddockName</literal>.
836 <literal>Distribution.Simple.Utils</literal> now exports
837 <literal>copyDirectoryRecursiveVerbose</literal>,
838 <literal>dirOf</literal>,
839 <literal>distPref</literal>,
840 <literal>haddockPref</literal> and
841 <literal>srcPref</literal>.
842 It no longer exports <literal>mkGHCiLibName</literal>.
849 <title>haskell98</title>
853 No change (version 1.0).
860 <title>parsec</title>
864 Version number 2.0 (was 1.0).
876 <title>readline</title>
880 No change (version 1.0).
887 <title>regex-base</title>
896 New library that provides common functions for different
904 <title>regex-compat</title>
913 New package providing a replacement
914 <literal>Text.Regex</literal> module.
921 <title>regex-posix</title>
930 A new package providing POSIX regexes.
941 Version number 2.0 (was 1.0).
946 A new module <literal>Control.Monad.STM</literal>
948 <literal>MonadPlus</literal> instance for
949 <literal>STM</literal> and the function
950 <literal>check</literal> (both used to be in
951 <literal>Control.Concurrent.STM</literal>).
953 <literal>STM</literal>,
954 <literal>atomically</literal>,
955 <literal>retry</literal>,
956 <literal>orElse</literal> and
957 <literal>catchSTM</literal>.
963 <literal>Control.Concurrent.STM.TArray</literal> defines
964 <literal>TArray</literal>, a transactional array, and makes
965 it an instance of <literal>MArray</literal>.
970 <literal>Control.Concurrent.STM.TChan</literal> now provides
971 a function <literal>newTChanIO</literal>, which allows
972 <literal>TChan</literal>s to be created in the IO monad.
973 Similarly, <literal>Control.Concurrent.STM.TMVar</literal>
974 provides <literal>newTMVarIO</literal> and
975 <literal>newEmptyTMVarIO</literal>, and
976 <literal>Control.Concurrent.STM.TVar</literal> exports
977 <literal>newTVarIO</literal>.
982 <literal>Control.Concurrent.STM.TVar</literal> exports
983 <literal>registerDelay</literal>.
988 The <literal>Control.Concurrent.STM</literal> module has been
989 updated to re-export all the new modules.
996 <title>template-haskell</title>
1000 Version number 2.0 (was 1.0).
1005 A <literal>Show</literal> instance is now derived for
1006 <literal>Info</literal>, <literal>Fixity</literal> and
1007 <literal>FixityDirection</literal> in
1008 <literal>Language.Haskell.TH.Syntax</literal>.
1013 In <literal>Language.Haskell.TH.Syntax</literal>, there is
1014 a type <literal>PkgName</literal> and functions
1015 <literal>mkPkgName</literal> and
1016 <literal>pkgString</literal>
1017 for dealing with package names.
1022 The <literal>patGE</literal> function in
1023 <literal>Language.Haskell.TH.Lib</literal> now takes the
1024 final expression separately to the list of statements
1025 rather than splitting it off itself.
1036 No change (version 1.0).
1043 <title>Win32</title>
1047 Version number 2.0 (was 1.0).
1052 Now maintained by Esa Ilari Vuokko.
1057 There is a new module
1058 <literal>System.Win32.Console</literal>
1059 providing an interface to the Windows Console API.
1064 There is a new module
1065 <literal>System.Win32.DebugApi</literal>
1066 providing an interface to the Windows DebugApi.
1071 There is a new module
1072 <literal>System.Win32.FileMapping</literal>
1073 for working with memory-mapped files.
1078 There is a new module
1079 <literal>System.Win32.SimpleMAPI</literal>
1080 for using the Windows mail API.
1085 There is a new module
1086 <literal>System.Win32.Time</literal>
1087 for using the Windows time API.
1092 <literal>iNVALID_HANDLE_VALUE</literal> has moved from
1093 <literal>Graphics.Win32.Misc</literal> to
1094 <literal>System.Win32.Types</literal>.
1099 <literal>System.Win32.File</literal> has a new
1100 function <literal>getFileInformationByHandle</literal>
1101 and associated data types.
1106 <literal>System.Win32.Info</literal> has a new
1107 function <literal>getSystemInfo</literal> and associated
1113 <literal>System.Win32.Process</literal> now has many more
1119 <literal>System.Win32.Types</literal> has new types
1120 <literal>LARGE_INTEGER</literal>, <literal>DDWORD</literal>
1121 and <literal>SIZE_T</literal>. It also has new helper
1122 functions <literal>ddwordToDwords</literal> and
1123 <literal>dwordsToDdword</literal> to split and combine
1124 ddwords into high and low components.
1129 <literal>System.Win32</literal> re-exports
1130 <literal>System.Win32.FileMapping</literal>,
1131 <literal>System.Win32.Time</literal>
1132 and <literal>System.Win32.Console</literal>.
1137 <literal>System.Win32</literal> no longer exports
1138 <literal>LCID</literal>,
1139 <literal>LANGID</literal>,
1140 <literal>SortID</literal>,
1141 <literal>SubLANGID</literal>,
1142 <literal>PrimaryLANGID</literal>,
1143 <literal>mAKELCID</literal>,
1144 <literal>lANGIDFROMLCID</literal>,
1145 <literal>sORTIDFROMLCID</literal>,
1146 <literal>mAKELANGID</literal>,
1147 <literal>pRIMARYLANGID</literal> or
1148 <literal>sUBLANGID</literal> from
1149 <literal>System.Win32.NLS</literal>.
1157 <title>Extra Libraries</title>
1163 Version number 2.0 (was 1.0).
1168 <literal>Sound.ALUT.BuiltInSounds</literal> has been removed.
1169 Its <literal>Phase</literal> and <literal>Duration</literal>
1170 exports are now exported by
1171 <literal>Sound.ALUT.Loaders</literal> and its
1172 <literal>helloWorld</literal>,
1173 <literal>sine</literal>,
1174 <literal>square</literal>,
1175 <literal>sawtooth</literal>,
1176 <literal>impulse</literal> and
1177 <literal>whiteNoise</literal>
1178 exports are now constructors of the
1179 <literal>Sound.ALUT.Loaders.SoundDataSource</literal>
1187 <title>arrows</title>
1191 Version number 0.2 (was 0.1).
1196 <literal>Control.Sequence</literal> has been removed in
1197 favour of the new <literal>Control.Applicative</literal>
1198 module in <literal>base</literal>.
1214 <literal>cgi</literal> is a new package, developing on
1215 what used to be <literal>Network.CGI</literal> in the
1216 <literal>network</literal> package.
1227 Version number 5.3 (was 5.2).
1232 <literal>Data.Graph.Inductive.Graph</literal> no longer
1233 exports <literal>UContext</literal>.
1238 <literal>Data.Graph.Inductive.Graph</literal> now exports
1239 <literal>delLEdge</literal>.
1250 Version number remains 2.0.
1255 In <literal>Graphics.UI.GLUT.Initialization</literal>,
1256 <literal>DisplayMode</literal> has a new constructor
1257 <literal>WithAuxBuffers</literal> and
1258 <literal>DisplayCapability</literal> has a new constructor
1259 <literal>DisplayAux</literal>. These represent freeglut-only
1265 There are new examples in
1266 <filename>BOGLGP/Chapter03/OnYourOwn1.hs</filename>,
1267 <filename>RedBook/AAIndex.hs</filename>,
1268 <filename>RedBook/AARGB.hs</filename>,
1269 <filename>RedBook/AccAnti.hs</filename>,
1270 <filename>RedBook/AccPersp.hs</filename>,
1271 <filename>RedBook/Alpha3D.hs</filename>,
1272 <filename>RedBook/DOF.hs</filename>,
1273 <filename>RedBook/FogIndex.hs</filename>,
1274 <filename>RedBook/Multisamp.hs</filename>,
1275 <filename>RedBook/PointP.hs</filename>,
1276 <filename>RedBook/PolyOff.hs</filename>,
1277 <filename>RedBook/Stencil.hs</filename>,
1278 <filename>RedBook/Stroke.hs</filename> and
1279 <filename>RedBook/Torus.hs</filename>,
1281 <filename>RedBook/Font.hs</filename> and
1282 <filename>RedBook/Histogram.hs</filename> have been
1290 <title>haskell-src</title>
1294 No change (version 1.0).
1301 <title>HaXml</title>
1305 Version number 1.16 (was 1.12.1).
1310 There are now lazy versions of the parsing modules
1311 <literal>Text.XML.HaXml.ParseLazy</literal>
1312 (a lazy non-validating XML parser) and
1313 <literal>Text.XML.HaXml.Html.ParseLazy</literal>
1314 (a lazy HTML parser).
1319 There are lazy versions of two of the example tools,
1320 <literal>CanonicaliseLazy</literal> and
1321 <literal>XtractLazy</literal>.
1326 <literal>Text.XML.HaXml.Haskell2Xml</literal> and
1327 <literal>Text.XML.HaXml.Xml2Haskell</literal> have been
1328 removed, with <literal>Text.XML.HaXml.XmlContent</literal>
1330 You must now use <literal>{-! derive : XmlContent !-}</literal>
1331 rather than <literal>{-! derive :Haskell2Xml !-}</literal>
1332 to have instances derived for your classes.
1337 Now also provides the
1338 <literal>Text.ParserCombinators.HuttonMeijer</literal>
1339 monadic parser combinator library.
1344 Provides another new set of parser combinators, as well as a lazy
1345 variant, a variant that carries around state, and a
1346 variant that does both. The modules are
1347 <literal>Text.ParserCombinators.Poly</literal>,
1348 <literal>Text.ParserCombinators.PolyLazy</literal>,
1349 <literal>Text.ParserCombinators.PolyState</literal> and
1350 <literal>Text.ParserCombinators.PolyStateLazy</literal>
1353 <literal>Text.ParserCombinators.TextParser</literal>, which
1354 is the <literal>Poly</literal> parser combinators
1355 specialised for strings.
1360 Now provides a SAX-like parser in
1361 <literal>Text.XML.HaXml.SAX</literal>.
1366 Now provides a module
1367 <literal>Text.XML.HaXml.TypeMapping</literal>, which
1368 defines an explicit representation for Haskell types.
1369 This allows generation of a DTD from a Haskell value.
1374 The <literal>Posn</literal> type has been pulled out from
1375 <literal>Text.XML.HaXml.Lex</literal> into its own module
1376 <literal>Text.XML.HaXml.Posn</literal>. Some helper
1377 functions are also exported.
1382 The APIs to the pre-existing modules have also substantially
1394 No change (version 3.1).
1410 <literal>html</literal> is a new package, developing on
1411 what used to be <literal>Text.Html</literal> and
1412 <literal>Text.Html.BlockTable</literal> in the
1413 <literal>base</literal> package.
1418 <literal>Text.Html.BlockTable</literal> exports a new
1419 function <literal>empty</literal>.
1426 <title>HUnit</title>
1430 No change (version 1.1).
1448 <title>monads</title>
1452 Version number 2.0.1 (was 1.1).
1457 In <literal>Monad.Id</literal>, <literal>run</literal> has
1458 been renamed <literal>runId</literal>.
1463 The <literal>Monad.BackT</literal> module has been removed;
1464 use the new <literal>Monad.SearchT</literal> module instead.
1469 There is a new module <literal>Monad.ForEach</literal>
1470 containing a class <literal>ForEach</literal>, for
1471 applying a monadic function to each element in a container.
1472 It provides instances for <literal>[]</literal> and
1473 <literal>Maybe</literal>.
1478 The following combinators have been moved from
1479 <literal>Monad.Prelude</literal> to a new module
1480 <literal>Monad.Combinators</literal>:
1481 <literal>(@@)</literal>,
1482 <literal>(#)</literal>,
1483 <literal>(<#)</literal>,
1484 <literal>(<##)</literal>,
1485 <literal>concatMap</literal> and
1486 <literal>partitionM</literal>.
1487 <literal>Monad.Combinators</literal> also defines the
1488 following new combinators:
1489 <literal>ifM</literal>,
1490 <literal>whenM</literal>,
1491 <literal>andM</literal>,
1492 <literal>orM</literal>,
1493 <literal>allM</literal>,
1494 <literal>anyM</literal>,
1495 <literal>forEach2</literal>,
1496 <literal>forEach2_</literal>,
1497 <literal>forEach3</literal> and
1498 <literal>forEach3_</literal>, and re-exports
1499 <literal>Control.Monad</literal>.
1505 <literal>Monad.Cont</literal>,
1506 <literal>Monad.Except</literal>,
1507 <literal>Monad.Reader</literal>,
1508 <literal>Monad.State</literal> and
1509 <literal>Monad.Writer</literal> have been removed, but their
1510 monad transformer counterparts remain. If you want the
1511 monads then just transform the identity monad instead.
1516 The <literal>Monad.ExceptT</literal> module now also exports
1517 runExceptWith and unsafeRunExcept. It also now defines an
1518 instance <literal>ContM (ExceptT x m)</literal>.
1523 In <literal>Monad.Prelude</literal>, the
1524 <literal>get</literal> method of the
1525 <literal>ReaderM</literal> module has been renamed
1526 <literal>getR</literal>. The <literal>local</literal> method
1527 has been removed with a new class
1528 <literal>ReadUpdM</literal>, with methods
1529 <literal>updateR</literal>
1530 and <literal>setR</literal>, taking its place.
1531 The <literal>letLocal</literal> function has also been removed.
1536 In <literal>Monad.Prelude</literal>,
1537 <literal>update</literal> has been made a method of
1538 <literal>StateM</literal>.
1540 <literal>peek</literal> and <literal>poke</literal> methods
1541 have been renamed <literal>get</literal> and
1542 <literal>set</literal> respectively, and both have a default
1543 definition in terms of <literal>update</literal>.
1544 The <literal>poke_</literal> function has also been renamed
1545 <literal>set_</literal>.
1550 In <literal>Monad.Prelude</literal>,
1551 <literal>handle</literal> has been taken out of the
1552 <literal>ExceptM</literal> class and put into a new
1553 class <literal>HandlerM</literal> along with a new method
1554 <literal>checkExcept</literal>.
1555 There are also new functions <literal>withHandler</literal>
1556 and <literal>handle_</literal>.
1561 The <literal>TakeWriterM</literal> class has been renamed
1562 <literal>CollectorM</literal>, and rather than a single
1563 method <literal>takeFrom</literal> it has methods
1564 <literal>censor</literal> and <literal>collect</literal>
1565 with default definitions in terms of each other.
1570 <literal>Monad.Prelude</literal> defines a type
1571 <literal>Cont</literal> and functions
1572 <literal>returnCC</literal> and <literal>cJump</literal>.
1577 <literal>Monad.Prelude</literal> exports functions
1578 <literal>inReader</literal>,
1579 <literal>inWriter</literal>,
1580 <literal>inState</literal> and
1581 <literal>inExcept</literal>.
1582 These make it easy to turn a pure representation of an
1583 effectful computation into an actual computation.
1588 The <literal>zipWith3M</literal> and
1589 <literal>zipWith3M_</literal> functions have been removed
1590 from <literal>Monad.Prelude</literal>.
1595 <literal>Monad.Prelude</literal> now re-exports
1596 <literal>Monad.Combinators</literal> and
1597 <literal>Monad.ForEach</literal>, but no longer re-exports
1598 <literal>Monad</literal>.
1603 There is a new module <literal>Monad.Transformers</literal>
1605 <literal>Monad.Id</literal>,
1606 <literal>Monad.ReaderT</literal>,
1607 <literal>Monad.WriterT</literal>,
1608 <literal>Monad.StateT</literal>,
1609 <literal>Monad.ExceptT</literal>,
1610 <literal>Monad.SearchT</literal> and
1611 <literal>Monad.ContT</literal>.
1622 No change (version 1.0).
1629 <title>network</title>
1633 Version number 2.0 (was 1.0).
1638 <literal>Network.CGI</literal> has been removed; use the
1639 <literal>cgi</literal> package instead.
1644 <literal>Network.BSD</literal> no longer exports
1645 <literal>symlink</literal> or <literal>readlink</literal>;
1647 <literal>System.Posix.Files.createSymbolicLink</literal> and
1648 <literal>System.Posix.Files.readSymbolicLink</literal>
1654 <literal>Network.BSD</literal> now exports
1655 <literal>defaultProtocol</literal>.
1660 <literal>Network.Socket.SocketStatus</literal> now has a
1661 constructor <literal>ConvertedToHandle</literal> for sockets
1662 that have been converted to handles.
1667 <literal>Network.Socket.Family</literal> now has the
1668 following additional constructors:
1669 <literal>AF_NETROM</literal>,
1670 <literal>AF_BRIDGE</literal>,
1671 <literal>AF_ATMPVC</literal>,
1672 <literal>AF_ROSE</literal>,
1673 <literal>AF_NETBEUI</literal>,
1674 <literal>AF_SECURITY</literal>,
1675 <literal>AF_PACKET</literal>,
1676 <literal>AF_ASH</literal>,
1677 <literal>AF_ECONET</literal>,
1678 <literal>AF_ATMSVC</literal>,
1679 <literal>AF_IRDA</literal>,
1680 <literal>AF_PPPOX</literal>,
1681 <literal>AF_WANPIPE</literal> and
1682 <literal>AF_BLUETOOTH</literal>.
1687 In <literal>Network.URI</literal>,
1688 <literal>parseabsoluteURI</literal> has been deprecated with
1689 a new function <literal>parseAbsoluteURI</literal> taking
1697 <title>ObjectIO</title>
1701 No change (version 1.0).
1708 <title>OpenAL</title>
1712 Version number 1.3 (was 1.2).
1724 <title>OpenGL</title>
1728 Version number 2.1 (was 2.0).
1740 <title>QuickCheck</title>
1744 No change (version 1.0).
1760 <literal>time</literal> is a new package, for dealing with
1761 dates, times and time intervals.
1772 Version number 1.2 (was 1.1).
1777 In <literal>Graphics.X11.Xlib.Types</literal>,
1778 <literal>XGCValues</literal> has been renamed
1779 <literal>GCValues</literal> and
1780 <literal>XSetWindowAttributes</literal> has been renamed
1781 <literal>SetWindowAttributes</literal>.
1786 In <literal>Graphics.X11.Xlib.Misc</literal>,
1787 <literal>allocaXSetWindowAttributes</literal> has been
1788 renamed <literal>allocaSetWindowAttributes</literal>.
1793 The <literal>FontStruct</literal> type has moved from
1794 <literal>Graphics.X11.Xlib.Types</literal> to
1795 <literal>Graphics.X11.Xlib.Font</literal>.
1801 <literal>Point</literal>,
1802 <literal>Rectangle</literal>,
1803 <literal>Arc</literal>,
1804 <literal>Segment</literal> and
1805 <literal>Color</literal> types in
1806 <literal>Graphics.X11.Xlib.Types</literal>
1807 are now proper datatypes rather than synonyms for tuples.
1808 They all have a <literal>Storable</literal> instance.
1813 The <literal>Byte</literal> and <literal>Short</literal>
1814 types from <literal>Graphics.X11.Xlib.Types</literal> have
1816 The following type synonyms, which had already been marked
1817 "Backwards compatibility", have also been removed:
1818 <literal>ListPoint</literal>,
1819 <literal>ListRectangle</literal>,
1820 <literal>ListArc</literal>,
1821 <literal>ListSegment</literal> and
1822 <literal>ListColor</literal>.
1827 <literal>Eq</literal>,
1828 <literal>Ord</literal>,
1829 <literal>Show</literal>,
1830 <literal>Typeable</literal> and
1831 <literal>Data</literal> are now derived for:
1832 <literal>XEvent</literal>,
1833 <literal>FdSet</literal> and
1834 <literal>TimeZone</literal> in
1835 <literal>Graphics.X11.Xlib.Event</literal>,
1836 <literal>FontStruct</literal> in
1837 <literal>Graphics.X11.Xlib.Font</literal>,
1838 <literal>XErrorEvent</literal>,
1839 <literal>XComposeStatus</literal> and
1840 <literal>XTextProperty</literal> in
1841 <literal>Graphics.X11.Xlib.Misc</literal>,
1842 <literal>Region</literal> in
1843 <literal>Graphics.X11.Xlib.Region</literal>,
1844 <literal>Display</literal>,
1845 <literal>Screen</literal>,
1846 <literal>Visual</literal>,
1847 <literal>GC</literal>,
1848 <literal>GCValues</literal>,
1849 <literal>SetWindowAttributes</literal>,
1850 <literal>Point</literal>,
1851 <literal>Rectangle</literal>,
1852 <literal>Arc</literal>,
1853 <literal>Segment</literal> and
1854 <literal>Color</literal> in
1855 <literal>Graphics.X11.Xlib.Types</literal>.
1862 <title>xhtml</title>
1871 <literal>xhtml</literal> is a new package, developing on
1872 what used to be <literal>Text.Html</literal> and
1873 <literal>Text.Html.BlockTable</literal> in the
1874 <literal>base</literal> package.
1882 <title>Internal changes</title>
1886 GHC development now has its own integrated
1887 <ulink url="http://hackage.haskell.org/trac/ghc">wiki and bug
1893 GHC has now moved to darcs. See
1895 url="http://hackage.haskell.org/trac/ghc/wiki/GhcDarcs">the
1896 wiki</ulink> for more details. The sources have moved around a
1897 bit within the tree as a result, most notably the GHC sources
1898 are no longer kept within a <filename>ghc/</filename>
1904 The native code generator is now capable of compiling loops,
1905 which gets us a big step closer to being able to compile
1906 entirely without gcc on well-supported arches.