docs/users_guide/6.6-notes.xml

   1 <?xml version="1.0" encoding="iso-8859-1"?>
   2 <sect1 id="release-6-6">
   3   <title>Release notes for version 6.6</title>
   4
   5   <sect2>
   6     <title>User-visible compiler changes</title>
   7     <itemizedlist>
   8       <listitem>
   9         <para>
  10           GHC now supports SMP:
  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" />.
  16         </para>
  17       </listitem>
  18       <listitem>
  19         <para>
  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.
  24         </para>
  25       </listitem>
  26       <listitem>
  27         <para>
  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>
  31           for more details of the change, or <xref linkend="impredicative-polymorphism" /> for the documentation.
  32         </para>
  33       </listitem>
  34       <listitem>
  35         <para>
  36           GHC now supports bang patterns to require a function is strict
  37           in a given argument, e.g.
  38           <programlisting>
  39     f (!x, y) = [x,y]</programlisting>
  40           is equivalent to
  41           <programlisting>
  42     f (x, y) | x `seq` False = undefined
  43              | otherwise = [x,y]</programlisting>
  44           See <xref linkend="sec-bang-patterns" /> for more details.
  45         </para>
  46       </listitem>
  47       <listitem>
  48         <para>
  49           The restriction that you cannot use two packages together if
  50           they contain a module with the same name has been removed.
  51           In implementation terms, the package name is now included in
  52           every exported symbol name in the object file, so that
  53           modules with the same name in different packages do not
  54           clash.  See <xref linkend="package-overlaps" />.
  55         </para>
  56       </listitem>
  57       <listitem>
  58         <para>
  59           GHC now treats source files as UTF-8 (ASCII is a strict
  60           subset of UTF-8, so ASCII source files will continue to
  61           work as before). However, invalid UTF-8 sequences are
  62           ignored in comments, so ASCII code with comments in, for
  63           example, Latin-1 will also work.
  64         </para>
  65       </listitem>
  66       <listitem>
  67         <para>
  68           GADTs can now use record syntax. Also, if the datatype could
  69           have been declared with Haskell 98 syntax then deriving
  70           clauses are permitted. For more info see <xref linkend="gadt" />.
  71         </para>
  72       </listitem>
  73       <listitem>
  74         <para>
  75           There is a new pragma <literal>LANGUAGE</literal> which allows
  76           extensions to be specified portably, i.e. without having to
  77           resort to the <literal>OPTIONS_GHC</literal> pragma and giving
  78           GHC-specific options. The arguments to the pragma are the same
  79           extensions that Cabal knows about. More info in
  80           <xref linkend="language-pragma" />.
  81         </para>
  82       </listitem>
  83       <listitem>
  84         <para>
  85           When you use <command>ghc --make</command>, GHC will now take
  86           the executable filename from the name of the file containing
  87           the <literal>Main</literal> module rather than using
  88           <filename>a.out</filename>. The <filename>.exe</filename>
  89           extension is appended on Windows, and it can of course be
  90           overridden with <option>-o</option>.
  91         </para>
  92       </listitem>
  93       <listitem>
  94         <para>
  95           GHC's garbage collector now deals more intelligently with
  96           mutable data, so you mostly no longer need to worry about GC
  97           performance when a lot of memory is taken up by
  98           <literal>STArray</literal>s, <literal>IOArray</literal>s,
  99           <literal>STRef</literal>s or <literal>IORef</literal>s.
 100           For more details see
 101           <ulink url="http://hackage.haskell.org/trac/ghc/ticket/650">trac bug #650</ulink>.
 102         </para>
 103       </listitem>
 104       <listitem>
 105         <para>
 106           GHC now allows more generalisation when typing mutually
 107           recursive bindings, resulting in more programs being accepted.
 108           See <xref linkend="typing-binds" /> for more details.
 109         </para>
 110       </listitem>
 111       <listitem>
 112         <para>
 113           The rules for instance declarations have been further relaxed.
 114           You are now permitted to have instances whose heads contain
 115           only type variables, e.g.
 116           <programlisting>
 117     instance C a</programlisting>
 118           and instances whose constraints are not only type variables,
 119           e.g.
 120           <programlisting>
 121     instance C2 Int a => C3 [a] b</programlisting>
 122           For more details, see <xref linkend="instance-rules" />.
 123         </para>
 124       </listitem>
 125       <listitem>
 126         <para>
 127             The following flags (and, where appropriate, their inverses)
 128             used to be static (can only be given on
 129             the command line) but are now dynamic (can also be given in
 130             a <literal>GHC_OPTIONS</literal> pragma or with
 131             <literal>:set</literal> in GHCi):
 132             <option>-c</option>,
 133             <option>-hcsuf</option>,
 134             <option>-hidir</option>,
 135             <option>-hisuf</option>,
 136             <option>-o</option>,
 137             <option>-odir</option>,
 138             <option>-ohi</option>,
 139             <option>-osuf</option>,
 140             <option>-keep-hc-file</option>,
 141             <option>-keep-s-file</option>,
 142             <option>-keep-raw-s-file</option>,
 143             <option>-keep-tmp-files</option>,
 144             <option>-tmpdir</option>,
 145             <option>-i</option>,
 146             <option>-package</option>,
 147             <option>-hide-package</option>,
 148             <option>-ignore-package</option>,
 149             <option>-package-conf</option>,
 150             <option>-no-user-package-conf</option>,
 151             <option>-fcontext-stack</option>,
 152             <option>-fexcess-precision</option>,
 153             <option>-fignore-asserts</option>,
 154             <option>-fignore-interface-pragmas</option>,
 155             <option>-I</option>,
 156             <option>-framework</option>,
 157             <option>-framework-path</option>,
 158             <option>-l</option>,
 159             <option>-L</option>,
 160             <option>-main-is</option>,
 161             <option>-no-hs-main</option>,
 162             <option>-split-objs</option>,
 163             <option>-pgmL</option>,
 164             <option>-pgmP</option>,
 165             <option>-pgmc</option>,
 166             <option>-pgma</option>,
 167             <option>-pgml</option>,
 168             <option>-pgmdll</option>,
 169             <option>-pgmdep</option>,
 170             <option>-pgmF</option>,
 171             <option>-optl</option>,
 172             <option>-optdll</option>,
 173             <option>-optdep</option>,
 174             <option>-fno-asm-mangling</option>.
 175             See <xref linkend="static-dynamic-flags" /> for more on
 176             the meaning of static and dynamic flags, and
 177             <xref linkend="flag-reference" /> for more on the flags
 178             themselves.
 179         </para>
 180       </listitem>
 181       <listitem>
 182         <para>
 183           There is a new flag <option>-x</option> for overriding the
 184           default behaviour for source files; see
 185           <xref linkend="overriding-suffixes" /> details.
 186         </para>
 187       </listitem>
 188       <listitem>
 189         <para>
 190           The <option>-fglobalise-toplev-names</option>
 191           flag has been removed.
 192         </para>
 193       </listitem>
 194       <listitem>
 195         <para>
 196           The <option>-fallow-overlapping-instances</option> flag is
 197           implied by the <option>-fallow-incoherent-instances</option>
 198           flag.
 199         </para>
 200       </listitem>
 201       <listitem>
 202         <para>
 203           The directory that the <filename>foo_stub.c</filename> and
 204           <filename>foo_stub.h</filename> files are put in can now be
 205           controlled with the <option>-stubdir</option> flag.
 206           See <xref linkend="options-output" /> for more details.
 207         </para>
 208       </listitem>
 209       <listitem>
 210         <para>
 211           When the <option>-fno-implicit-prelude</option> is given,
 212           the equality test performed when pattern matching against an
 213           overloaded numeric literal now uses the
 214           <literal>(==)</literal> in scope, rather than the one from
 215           <literal>Prelude</literal>. Likewise, the subtraction and
 216           inequality test performed when pattern matching against
 217           <literal>n+k</literal> patterns uses the
 218           <literal>(-)</literal> and <literal>(>=)</literal> in scope.
 219         </para>
 220       </listitem>
 221       <listitem>
 222         <para>
 223           Another change to <option>-fno-implicit-prelude</option>:
 224           with the exception of the arrow syntax, the types of
 225           functions used by sugar (such as do notation, numeric
 226           literal patterns) need not match the types of the
 227           <literal>Prelude</literal> functions normally used.
 228         </para>
 229       </listitem>
 230       <listitem>
 231         <para>
 232           The <literal>InstalledPackageInfo</literal> syntax has
 233           changed. Now
 234           instead of <literal>extra-libs</literal> we have
 235           <literal>extra-libraries</literal>,
 236           instead of <literal>extra-hugs-opts</literal> we have
 237           <literal>hugs-options</literal>,
 238           instead of <literal>extra-cc-opts</literal> we have
 239           <literal>cc-options</literal>,
 240           instead of <literal>extra-ld-opts</literal> we have
 241           <literal>ld-options</literal>,
 242           and instead of <literal>extra-frameworks</literal> we have
 243           <literal>frameworks</literal>.
 244           See <xref linkend="installed-pkg-info" /> for details.
 245         </para>
 246       </listitem>
 247       <listitem>
 248         <para>
 249           If you <literal>newtype</literal> the IO monad, e.g.
 250           <programlisting>
 251     newtype MyIO a = MyIO (IO a)</programlisting>
 252           then GHC will now allow you to have FFI calls return
 253           <literal>MyIO <replaceable>t</replaceable></literal>
 254           rather than just
 255           <literal>IO <replaceable>t</replaceable></literal>.
 256           See <xref linkend="ffi-newtype-io"/>
 257         </para>
 258       </listitem>
 259       <listitem> <para> GHC's mechansim for deriving user-defined classes
 260           for newtypes has been further generalised, to multi-parameter type
 261           classes and higher-kinded types.  See <xref
 262           linkend="newtype-deriving"/>.
 263           </para></listitem>
 264       <listitem>
 265         <para>
 266           By default, pattern bindings in GHC are now monomorphic.
 267           This means that some valid Haskell 98 programs will get
 268           rejected, but we believe they will be few in number.
 269           To revert to the old behaviour use the
 270           <option>-fno-mono-pat-binds</option> flag.
 271           More details are in <xref linkend="options-language" />.
 272         </para>
 273       </listitem>
 274       <listitem>
 275         <para>
 276           GHCi already does more defaulting than Haskell 98 so that, for
 277           example, <literal>reverse []</literal> shows a result rather
 278           than giving an ambiguous type variable error. There is now a
 279           flag <option>-fextended-default-rules</option> to use these
 280           defaulting rules with GHC too.
 281           More details are in <xref linkend="extended-default-rules" />.
 282         </para>
 283       </listitem>
 284       <listitem>
 285         <para>
 286           You can now give both class and instance declarations in
 287           <filename>.hs-boot</filename> files. More details in
 288           <xref linkend="mutual-recursion" />.
 289         </para>
 290       </listitem>
 291       <listitem>
 292         <para>
 293           Linear implicit parameters have been scheduled for removal for some
 294           time.  In 6.6 we've removed them from the user manual, and they may
 295           well disappear from the compiler itself in 6.6.1.
 296         </para>
 297       </listitem>
 298       <listitem>
 299         <para>
 300           It is now possible, with the <literal>-I</literal> RTS flag,
 301           to control the amount of idle time that happens before a major
 302           GC is performed. There is more detail in
 303           <xref linkend="rts-options-gc" />.
 304         </para>
 305       </listitem>
 306       <listitem>
 307         <para>
 308           The old syntax for FFI declarations (deprecated since 5.04)
 309           is no longer accepted.
 310         </para>
 311       </listitem>
 312       <listitem>
 313         <para>
 314           The <option>-split-objs</option> flag, which makes libraries
 315           smaller, can now be used with <option>--make</option> and hence
 316           can be used by cabal.
 317           See <xref linkend="options-linker" /> for more information.
 318         </para>
 319       </listitem>
 320       <listitem>
 321         <para>
 322           Template Haskell used to have limited support for type signatures in
 323           patterns, but since that design is in flux for Haskell (let alone
 324           Template Haskell), we've removed type signatures in patterns from
 325           Template Haskell.
 326         </para>
 327       </listitem>
 328       <listitem>
 329         <para>
 330           Parallel arrays, as enabled by <literal>-fparr</literal>, no
 331           longer work.
 332         </para>
 333       </listitem>
 334     </itemizedlist>
 335   </sect2>
 336
 337   <sect2>
 338     <title>GHCi changes</title>
 339
 340     <itemizedlist>
 341       <listitem>
 342         <para>
 343           GHCi now allows tab completion of in-scope names and modules
 344           on platforms that use readline (i.e. not Windows).
 345         </para>
 346       </listitem>
 347       <listitem>
 348         <para>
 349           GHCi now has a <literal>:main</literal> command that allows
 350           you to call the <literal>main</literal> function with
 351           command-line arguments.
 352           See <xref linkend="ghci-commands" /> for more information.
 353         </para>
 354       </listitem>
 355       <listitem>
 356         <para>
 357           GHCi now has <literal>:ctags</literal> and
 358           <literal>:etags</literal> commands to generate tags files for
 359           vi-style and emacs-style editors respectively.
 360           See <xref linkend="ghci-commands" /> for more information.
 361         </para>
 362       </listitem>
 363     </itemizedlist>
 364   </sect2>
 365
 366   <sect2>
 367     <title>Libraries</title>
 368     <para>
 369       Libraries are now divided into core libraries (those that are
 370       necessary to build GHC) and extra libraries. Decoupling the extra
 371       libraries means that they can release independently of GHC
 372       releases, and makes development builds of GHC quicker as they no
 373       longer need to build unnecessary libraries.
 374     </para>
 375
 376     <para>
 377       The hslibs libraries have finally been removed.
 378     </para>
 379   </sect2>
 380
 381   <sect2>
 382     <title>Core Libraries</title>
 383     <sect3>
 384       <title>base</title>
 385       <itemizedlist>
 386         <listitem>
 387           <para>
 388             Version number 2.0 (was 1.0).
 389           </para>
 390         </listitem>
 391         <listitem>
 392           <para>
 393             We now have <literal>Read</literal> and
 394             <literal>Show</literal> instances for up to 15-tuples (used
 395             to be up to 5-tuples).
 396           </para>
 397         </listitem>
 398         <listitem>
 399           <para>
 400             New module <literal>Control.Applicative</literal> that
 401             describes a structure intermediate between a functor and
 402             a monad: it provides pure expressions and sequencing, but
 403             no binding.
 404           </para>
 405         </listitem>
 406         <listitem>
 407           <para>
 408             <literal>Control.Exception</literal> now exports
 409             <literal>bracketOnError</literal>, which behaves like
 410             <literal>bracket</literal> but only runs the final
 411             action if the main action raised an error.
 412           </para>
 413         </listitem>
 414         <listitem>
 415           <para>
 416             There is a new module
 417             <literal>Control.Monad.Instances</literal> which
 418             provides <literal>Monad</literal> and
 419             <literal>Functor</literal> instances for
 420             <literal>((->) r)</literal> (were in
 421             <literal>mtl</literal>'s
 422             <literal>Control.Monad.Reader</literal>),
 423             a <literal>Functor</literal> instance for
 424             <literal>(Either a)</literal> (was in <literal>mtl</literal>'s
 425             <literal>Control.Monad.Error</literal>) and a
 426             <literal>Functor</literal> instance for
 427             <literal>((,) a)</literal> (new).
 428           </para>
 429         </listitem>
 430         <listitem>
 431           <para>
 432             The <literal>MonadFix</literal> instance for
 433             <literal>((->) r)</literal> is now in
 434             <literal>Control.Monad.Fix</literal> (was in
 435             <literal>mtl</literal>'s
 436             <literal>Control.Monad.Reader</literal>).
 437           </para>
 438         </listitem>
 439         <listitem>
 440           <para>
 441             <literal>Control.Monad.ST</literal> now exports
 442             <literal>unsafeSTToIO</literal>.
 443           </para>
 444         </listitem>
 445         <listitem>
 446           <para>
 447             The <literal>HasBounds</literal> class has been removed from
 448             <literal>Data.Array.Base</literal>, and its
 449             <literal>bounds</literal> method is now in the
 450             <literal>IArray</literal> class. The
 451             <literal>MArray</literal> class
 452             has also gained a method <literal>getBounds</literal>.
 453           </para>
 454         </listitem>
 455         <listitem>
 456           <para>
 457             <literal>Data.Array.Base</literal> now provides an
 458             <literal>MArray (STArray s) e (Lazy.ST s)</literal>
 459             instance.
 460           </para>
 461         </listitem>
 462         <listitem>
 463           <para>
 464             <literal>Data.Array.Storable</literal> now exports a
 465             function <literal>unsafeForeignPtrToStorableArray</literal>.
 466           </para>
 467         </listitem>
 468         <listitem>
 469           <para>
 470             The new <literal>Data.ByteString</literal> hierarchy
 471             provides time and space-efficient byte vectors.
 472             The old <literal>Data.PackedString</literal> module is now
 473             deprecated as a result, although there is not yet a
 474             replacement if you need full unicode support.
 475           </para>
 476         </listitem>
 477         <listitem>
 478           <para>
 479             <literal>GHC.Exts</literal> now provides a function
 480             <literal>inline</literal> which, provided the RHS is visible
 481             to the compiler, forcibly inlines its argument.
 482             Otherwise, it acts like <literal>id</literal>.
 483           </para>
 484         </listitem>
 485         <listitem>
 486           <para>
 487             <literal>GHC.Exts</literal> now provides a function
 488             <literal>lazy</literal> which forces GHC to think that its
 489             argument is lazy in its first argument.
 490           </para>
 491         </listitem>
 492         <listitem>
 493           <para>
 494             <literal>Data.FiniteMap</literal> has been removed
 495             (deprecated since 6.4). Use <literal>Data.Map</literal>
 496             instead.
 497           </para>
 498         </listitem>
 499         <listitem>
 500           <para>
 501             <literal>Data.Char</literal> now exports
 502             <literal>isLetter</literal>,
 503             <literal>isMark</literal>,
 504             <literal>isNumber</literal>,
 505             <literal>isPunctuation</literal>,
 506             <literal>isSymbol</literal>,
 507             <literal>isSeparator</literal>,
 508             <literal>isAsciiUpper</literal>,
 509             <literal>isAsciiLower</literal> and
 510             <literal>toTitle</literal>.
 511             It also exports a function
 512             <literal>generalCategory</literal> that tells you the
 513             category of a character in terms of a datatype
 514             <literal>GeneralCategory</literal>.
 515           </para>
 516         </listitem>
 517         <listitem>
 518           <para>
 519             <literal>Data.Dynamic</literal> now exports a function
 520             <literal>dynTypeRep</literal>.
 521           </para>
 522         </listitem>
 523         <listitem>
 524           <para>
 525             There is a new module <literal>Data.Eq</literal> which
 526             just exports the <literal>Eq</literal> class.
 527             Likewise, a new module <literal>Data.Ord</literal>
 528             exports the <literal>Ord</literal> class, as well as the
 529             handy <literal>comparing</literal> function.
 530           </para>
 531         </listitem>
 532         <listitem>
 533           <para>
 534             There is a new module <literal>Data.Fixed</literal>
 535             providing fixed-precision arithmetic.
 536           </para>
 537         </listitem>
 538         <listitem>
 539           <para>
 540             There is a new module <literal>Data.Foldable</literal>
 541             providing a class for foldable datatypes. It gives instances
 542             for <literal>Maybe</literal>, <literal>[]</literal> and
 543             <literal>Array i</literal>.
 544           </para>
 545         </listitem>
 546         <listitem>
 547           <para>
 548             There is a new module <literal>Data.Traversable</literal>
 549             providing a class for data structures that can be traversed
 550             from left to right. It gives instances
 551             for <literal>Maybe</literal>, <literal>[]</literal> and
 552             <literal>Array i</literal>.
 553           </para>
 554         </listitem>
 555         <listitem>
 556           <para>
 557             <literal>Data.FunctorM</literal> has been deprecated;
 558             use <literal>Data.Foldable</literal> and
 559             <literal>Data.Traversable</literal> instead.
 560           </para>
 561         </listitem>
 562         <listitem>
 563           <para>
 564             The <literal>toConstr</literal> definitions for tuples in
 565             <literal>Data.Generics.Instances</literal> now actually
 566             evaluate their arguments to tuples before returning
 567             anything.
 568           </para>
 569         </listitem>
 570         <listitem>
 571           <para>
 572             <literal>Data.IntMap</literal> now exports
 573             <literal>notMember</literal>,
 574             <literal>alter</literal>,
 575             <literal>mapMaybe</literal>,
 576             <literal>mapMaybeWithKey</literal>,
 577             <literal>mapEither</literal> and
 578             <literal>mapEitherWithKey</literal>.
 579             It also has <literal>Monoid</literal>,
 580             <literal>Foldable</literal> and <literal>Read</literal>
 581             instances.
 582           </para>
 583         </listitem>
 584         <listitem>
 585           <para>
 586             <literal>Data.IntSet</literal> now exports
 587             <literal>notMember</literal>. It also has
 588             <literal>Monoid</literal> and <literal>Read</literal>
 589             instances.
 590           </para>
 591         </listitem>
 592         <listitem>
 593           <para>
 594             <literal>Data.Map</literal> now exports
 595             <literal>notMember</literal>,
 596             <literal>alter</literal>,
 597             <literal>mapMaybe</literal>,
 598             <literal>mapMaybeWithKey</literal>,
 599             <literal>mapEither</literal>,
 600             <literal>mapEitherWithKey</literal>,
 601             <literal>minView</literal> and
 602             <literal>maxView</literal>.
 603             It also has <literal>Monoid</literal>,
 604             <literal>Traversable</literal>, <literal>Foldable</literal>
 605             and <literal>Read</literal> instances.
 606           </para>
 607         </listitem>
 608         <listitem>
 609           <para>
 610             <literal>Data.Set</literal> now exports
 611             <literal>notMember</literal>,
 612             <literal>minView</literal> and
 613             <literal>maxView</literal>.
 614             It also has <literal>Monoid</literal>,
 615             <literal>Foldable</literal>
 616             and <literal>Read</literal> instances.
 617           </para>
 618
 619           <para>
 620             The old, deprecated (since 6.4) interface consisting of
 621             <literal>emptySet</literal>,
 622             <literal>mkSet</literal>,
 623             <literal>setToList</literal>,
 624             <literal>unitSet</literal>,
 625             <literal>elementOf</literal>,
 626             <literal>isEmptySet</literal>,
 627             <literal>cardinality</literal>,
 628             <literal>unionManySets</literal>,
 629             <literal>minusSet</literal>,
 630             <literal>mapSet</literal>,
 631             <literal>intersect</literal>,
 632             <literal>addToSet</literal> and
 633             <literal>delFromSet</literal> has been removed.
 634           </para>
 635         </listitem>
 636         <listitem>
 637           <para>
 638             <literal>Data.Monoid</literal> no longer contains the
 639             <literal>Monoid</literal>
 640             instances for <literal>Map</literal>,
 641             <literal>IntMap</literal>, <literal>Set</literal> and
 642             <literal>IntSet</literal>. They have been moved to their own
 643             modules, as above. The <literal>(a -> a)</literal> instance
 644             has been replaced with a
 645             <literal>Monoid b => Monoid (a -> b)</literal> instance.
 646             The module also now exports
 647             <literal>Dual</literal>,
 648             <literal>Endo</literal>,
 649             <literal>All</literal>,
 650             <literal>Any</literal>,
 651             <literal>Sum</literal> and
 652             <literal>Product</literal> types, and
 653             <literal>Monoid</literal> instances for them.
 654           </para>
 655         </listitem>
 656         <listitem>
 657           <para>
 658             There is a new module <literal>Data.Sequence</literal>
 659             for finite sequences. The <literal>Data.Queue</literal>
 660             module is now deprecated in favour of this faster, more
 661             featureful replacement.
 662           </para>
 663         </listitem>
 664         <listitem>
 665           <para>
 666             <literal>Data.Tree</literal> now has
 667             <literal>Data</literal>, <literal>Typeable</literal>,
 668             <literal>Traversable</literal> and
 669             <literal>Foldable</literal>
 670             instances for the
 671             <literal>Tree</literal> datatype.
 672           </para>
 673         </listitem>
 674         <listitem>
 675           <para>
 676             <literal>Data.Typeable</literal> now uses
 677             <option>-fallow-overlapping-instances</option>, so the
 678             generic instances can be overriden for your own datatypes.
 679           </para>
 680         </listitem>
 681         <listitem>
 682           <para>
 683             <literal>Debug.Trace</literal> now exports
 684             <literal>traceShow</literal>, which is the same as
 685             <literal>trace</literal> except its first argument can be
 686             any showable thing rather than being required to be a
 687             string.
 688           </para>
 689         </listitem>
 690         <listitem>
 691           <para>
 692             <literal>Foreign.C.Types</literal> now also defines
 693             <literal>CIntPtr</literal>,
 694             <literal>CUIntPtr</literal>,
 695             <literal>CIntMax</literal> and
 696             <literal>CUIntMax</literal>.
 697           </para>
 698         </listitem>
 699         <listitem>
 700           <para>
 701             <literal>Foreign.ForeignPtr</literal> now exports
 702             <literal>FinalizerEnvPtr</literal>,
 703             <literal>newForeignPtrEnv</literal> and
 704             <literal>addForeignPtrFinalizerEnv</literal>.
 705             Together, these allow the use of finalizers which are passed
 706             an additional environment parameter.
 707           </para>
 708         </listitem>
 709         <listitem>
 710           <para>
 711             <literal>Foreign.Marshal.Utils</literal> no longer exports
 712             the <literal>withObject</literal> function, deprecated since
 713             5.04; use <literal>with</literal> instead.
 714           </para>
 715         </listitem>
 716         <listitem>
 717           <para>
 718             Foreign.Ptr now also defines
 719             <literal>IntPtr</literal>,
 720             <literal>ptrToIntPtr</literal>,
 721             <literal>intPtrToPtr</literal>,
 722             <literal>WordPtr</literal>,
 723             <literal>ptrToWordPtr</literal> and
 724             <literal>wordPtrToPtr</literal>.
 725           </para>
 726         </listitem>
 727         <listitem>
 728           <para>
 729             There are now <literal>Bounded</literal> instances for up to
 730             15-tuples (used to be up to 4-tuples).
 731           </para>
 732         </listitem>
 733         <listitem>
 734           <para>
 735             The <literal>Text.Html</literal> and
 736             <literal>Text.Html.BlockTable</literal> modules have now
 737             been removed, with the new <literal>html</literal> and
 738             <literal>xhtml</literal> packages providing replacements.
 739           </para>
 740         </listitem>
 741         <listitem>
 742           <para>
 743             <literal>Text.Read</literal> now exports a function
 744             <literal>parens</literal> which parses a value in an
 745             arbitrary number of parentheses.
 746           </para>
 747         </listitem>
 748         <listitem>
 749           <para>
 750             The <literal>ForeignPtr</literal> datatype has been altered
 751             to make it more efficient. There are also new functions
 752             <literal>mallocPlainForeignPtr</literal> and
 753             <literal>mallocPlainForeignPtrBytes</literal> which
 754             do not allow you to attach a finalizer to the
 755             <literal>ForeignPtr</literal>.
 756           </para>
 757         </listitem>
 758         <listitem>
 759           <para>
 760             The <literal>Text.Regex</literal> and
 761             <literal>Text.Regex.Posix</literal> modules have been removed.
 762             Instead, use the new <literal>regex-compat</literal> package
 763             for a drop-in <literal>Text.Regex</literal> replacement, or
 764             the new library in the new <literal>regex-posix</literal>
 765             package.
 766           </para>
 767         </listitem>
 768       </itemizedlist>
 769     </sect3>
 770
 771     <sect3>
 772       <title>Cabal</title>
 773       <itemizedlist>
 774         <listitem>
 775           <para>
 776             Version number 1.1.6 (was 1.1.4).
 777           </para>
 778         </listitem>
 779         <listitem>
 780           <para>
 781             Support for JHC, symmetric to the support for the other
 782             implementations, has been added throughout.
 783           </para>
 784         </listitem>
 785         <listitem>
 786           <para>
 787             Support for object splitting and building in-place
 788             has been added throughout.
 789           </para>
 790         </listitem>
 791         <listitem>
 792           <para>
 793             Added a <filename>debianTemplate</filename> directory with
 794             templates for building Debian packages from Cabal packages.
 795           </para>
 796         </listitem>
 797         <listitem>
 798           <para>
 799             There are now modules
 800             <literal>Distribution.Simple.<replaceable>compiler</replaceable></literal>
 801             for each of <literal>GHC</literal>, <literal>NHC</literal>,
 802             <literal>Hugs</literal> and <literal>JHC</literal>.
 803             The <literal>Distribution.Simple.Build</literal> and
 804             <literal>Distribution.Simple.Install</literal> modules have
 805             shrunk correspondingly.
 806           </para>
 807         </listitem>
 808         <listitem>
 809           <para>
 810             <literal>Distribution.GetOpt</literal> is no longer a
 811             visible module.
 812           </para>
 813         </listitem>
 814         <listitem>
 815           <para>
 816             <literal>Distribution.Simple</literal> exports a function
 817             <literal>defaultMainArgs</literal>, which is identical to
 818             <literal>defaultMain</literal> except that the arguments are
 819             given as a list of strings rather than being retrieved with
 820             <literal>getArgs</literal>.
 821           </para>
 822         </listitem>
 823         <listitem>
 824           <para>
 825             <literal>Distribution.Simple.Configure</literal>
 826             no longer exports
 827             <literal>LocalBuildInfo</literal>,
 828             but does now export
 829             <literal>configDependency</literal> and
 830             <literal>configCompilerAux</literal>.
 831           </para>
 832         </listitem>
 833         <listitem>
 834           <para>
 835             <literal>Distribution.Simple.LocalBuildInfo</literal> now
 836             exports <literal>mkHaddockDir</literal>,
 837             <literal>distPref</literal>,
 838             <literal>srcPref</literal>,
 839             <literal>autogenModulesDir</literal> and
 840             <literal>mkIncludeDir</literal>.
 841           </para>
 842         </listitem>
 843         <listitem>
 844           <para>
 845             <literal>Distribution.PackageDescription</literal> now
 846             exports <literal>haddockName</literal>.
 847           </para>
 848         </listitem>
 849         <listitem>
 850           <para>
 851             <literal>Distribution.Simple.Utils</literal> now exports
 852             <literal>copyDirectoryRecursiveVerbose</literal>,
 853             <literal>dirOf</literal>,
 854             <literal>distPref</literal>,
 855             <literal>haddockPref</literal> and
 856             <literal>srcPref</literal>.
 857             It no longer exports <literal>mkGHCiLibName</literal>.
 858           </para>
 859         </listitem>
 860       </itemizedlist>
 861     </sect3>
 862
 863     <sect3>
 864       <title>haskell98</title>
 865       <itemizedlist>
 866         <listitem>
 867           <para>
 868             No change (version 1.0).
 869           </para>
 870         </listitem>
 871       </itemizedlist>
 872     </sect3>
 873
 874     <sect3>
 875       <title>parsec</title>
 876       <itemizedlist>
 877         <listitem>
 878           <para>
 879             Version number 2.0 (was 1.0).
 880           </para>
 881         </listitem>
 882         <listitem>
 883           <para>
 884             No other change.
 885           </para>
 886         </listitem>
 887       </itemizedlist>
 888     </sect3>
 889
 890     <sect3>
 891       <title>readline</title>
 892       <itemizedlist>
 893         <listitem>
 894           <para>
 895             No change (version 1.0).
 896           </para>
 897         </listitem>
 898       </itemizedlist>
 899     </sect3>
 900
 901     <sect3>
 902       <title>regex-base</title>
 903       <itemizedlist>
 904         <listitem>
 905           <para>
 906             Version 0.71.
 907           </para>
 908         </listitem>
 909         <listitem>
 910           <para>
 911             New library that provides common functions for different
 912             regex backends.
 913           </para>
 914         </listitem>
 915       </itemizedlist>
 916     </sect3>
 917
 918     <sect3>
 919       <title>regex-compat</title>
 920       <itemizedlist>
 921         <listitem>
 922           <para>
 923             Version 0.71.
 924           </para>
 925         </listitem>
 926         <listitem>
 927           <para>
 928             New package providing a replacement
 929             <literal>Text.Regex</literal> module.
 930           </para>
 931         </listitem>
 932       </itemizedlist>
 933     </sect3>
 934
 935     <sect3>
 936       <title>regex-posix</title>
 937       <itemizedlist>
 938         <listitem>
 939           <para>
 940             Version 0.71.
 941           </para>
 942         </listitem>
 943         <listitem>
 944           <para>
 945             A new package providing POSIX regexes.
 946           </para>
 947         </listitem>
 948       </itemizedlist>
 949     </sect3>
 950
 951     <sect3>
 952       <title>stm</title>
 953       <itemizedlist>
 954         <listitem>
 955           <para>
 956             Version number 2.0 (was 1.0).
 957           </para>
 958         </listitem>
 959         <listitem>
 960           <para>
 961             A new module <literal>Control.Monad.STM</literal>
 962             contains the
 963             <literal>MonadPlus</literal> instance for
 964             <literal>STM</literal> and the function
 965             <literal>check</literal> (both used to be in
 966             <literal>Control.Concurrent.STM</literal>).
 967             It also re-exports
 968             <literal>STM</literal>,
 969             <literal>atomically</literal>,
 970             <literal>retry</literal>,
 971             <literal>orElse</literal> and
 972             <literal>catchSTM</literal>.
 973           </para>
 974         </listitem>
 975         <listitem>
 976           <para>
 977             A new module
 978             <literal>Control.Concurrent.STM.TArray</literal> defines
 979             <literal>TArray</literal>, a transactional array, and makes
 980             it an instance of <literal>MArray</literal>.
 981           </para>
 982         </listitem>
 983         <listitem>
 984           <para>
 985             <literal>Control.Concurrent.STM.TChan</literal> now provides
 986             a function <literal>newTChanIO</literal>, which allows
 987             <literal>TChan</literal>s to be created in the IO monad.
 988             Similarly, <literal>Control.Concurrent.STM.TMVar</literal>
 989             provides <literal>newTMVarIO</literal> and
 990             <literal>newEmptyTMVarIO</literal>, and
 991             <literal>Control.Concurrent.STM.TVar</literal> exports
 992             <literal>newTVarIO</literal>.
 993           </para>
 994         </listitem>
 995         <listitem>
 996           <para>
 997             <literal>Control.Concurrent.STM.TVar</literal> exports
 998             <literal>registerDelay</literal>.
 999           </para>
1000         </listitem>
1001         <listitem>
1002           <para>
1003             The <literal>Control.Concurrent.STM</literal> module has been
1004             updated to re-export all the new modules.
1005           </para>
1006         </listitem>
1007       </itemizedlist>
1008     </sect3>
1009
1010     <sect3>
1011       <title>template-haskell</title>
1012       <itemizedlist>
1013         <listitem>
1014           <para>
1015             Version number 2.0 (was 1.0).
1016           </para>
1017         </listitem>
1018         <listitem>
1019           <para>
1020             A <literal>Show</literal> instance is now derived for
1021             <literal>Info</literal>, <literal>Fixity</literal> and
1022             <literal>FixityDirection</literal> in
1023             <literal>Language.Haskell.TH.Syntax</literal>.
1024           </para>
1025         </listitem>
1026         <listitem>
1027           <para>
1028             In <literal>Language.Haskell.TH.Syntax</literal>, there is
1029             a type <literal>PkgName</literal> and functions
1030             <literal>mkPkgName</literal> and
1031             <literal>pkgString</literal>
1032             for dealing with package names.
1033           </para>
1034         </listitem>
1035         <listitem>
1036           <para>
1037             The <literal>patGE</literal> function in
1038             <literal>Language.Haskell.TH.Lib</literal> now takes the
1039             final expression separately to the list of statements
1040             rather than splitting it off itself.
1041           </para>
1042         </listitem>
1043       </itemizedlist>
1044     </sect3>
1045
1046     <sect3>
1047       <title>unix</title>
1048       <itemizedlist>
1049         <listitem>
1050           <para>
1051             No change (version 1.0).
1052           </para>
1053         </listitem>
1054       </itemizedlist>
1055     </sect3>
1056
1057     <sect3>
1058       <title>Win32</title>
1059       <itemizedlist>
1060         <listitem>
1061           <para>
1062             Version number 2.0 (was 1.0).
1063           </para>
1064         </listitem>
1065         <listitem>
1066           <para>
1067             Now maintained by Esa Ilari Vuokko.
1068           </para>
1069         </listitem>
1070         <listitem>
1071           <para>
1072             There is a new module
1073             <literal>System.Win32.Console</literal>
1074             providing an interface to the Windows Console API.
1075           </para>
1076         </listitem>
1077         <listitem>
1078           <para>
1079             There is a new module
1080             <literal>System.Win32.DebugApi</literal>
1081             providing an interface to the Windows DebugApi.
1082           </para>
1083         </listitem>
1084         <listitem>
1085           <para>
1086             There is a new module
1087             <literal>System.Win32.FileMapping</literal>
1088             for working with memory-mapped files.
1089           </para>
1090         </listitem>
1091         <listitem>
1092           <para>
1093             There is a new module
1094             <literal>System.Win32.SimpleMAPI</literal>
1095             for using the Windows mail API.
1096           </para>
1097         </listitem>
1098         <listitem>
1099           <para>
1100             There is a new module
1101             <literal>System.Win32.Time</literal>
1102             for using the Windows time API.
1103           </para>
1104         </listitem>
1105         <listitem>
1106           <para>
1107             <literal>iNVALID_HANDLE_VALUE</literal> has moved from
1108             <literal>Graphics.Win32.Misc</literal> to
1109             <literal>System.Win32.Types</literal>.
1110           </para>
1111         </listitem>
1112         <listitem>
1113           <para>
1114             <literal>System.Win32.File</literal> has a new
1115             function <literal>getFileInformationByHandle</literal>
1116             and associated data types.
1117           </para>
1118         </listitem>
1119         <listitem>
1120           <para>
1121             <literal>System.Win32.Info</literal> has a new
1122             function <literal>getSystemInfo</literal> and associated
1123             data types.
1124           </para>
1125         </listitem>
1126         <listitem>
1127           <para>
1128             <literal>System.Win32.Process</literal> now has many more
1129             exports.
1130           </para>
1131         </listitem>
1132         <listitem>
1133           <para>
1134             <literal>System.Win32.Types</literal> has new types
1135             <literal>LARGE_INTEGER</literal>, <literal>DDWORD</literal>
1136             and <literal>SIZE_T</literal>. It also has new helper
1137             functions <literal>ddwordToDwords</literal> and
1138             <literal>dwordsToDdword</literal> to split and combine
1139             ddwords into high and low components.
1140           </para>
1141         </listitem>
1142         <listitem>
1143           <para>
1144             <literal>System.Win32</literal> re-exports
1145             <literal>System.Win32.FileMapping</literal>,
1146             <literal>System.Win32.Time</literal>
1147             and <literal>System.Win32.Console</literal>.
1148           </para>
1149         </listitem>
1150       </itemizedlist>
1151     </sect3>
1152   </sect2>
1153
1154   <sect2>
1155     <title>Extra Libraries</title>
1156     <sect3>
1157       <title>ALUT</title>
1158       <itemizedlist>
1159         <listitem>
1160           <para>
1161             Version number 2.0 (was 1.0).
1162           </para>
1163         </listitem>
1164         <listitem>
1165           <para>
1166             <literal>Sound.ALUT.BuiltInSounds</literal> has been removed.
1167             Its <literal>Phase</literal> and <literal>Duration</literal>
1168             exports are now exported by
1169             <literal>Sound.ALUT.Loaders</literal> and its
1170             <literal>helloWorld</literal>,
1171             <literal>sine</literal>,
1172             <literal>square</literal>,
1173             <literal>sawtooth</literal>,
1174             <literal>impulse</literal> and
1175             <literal>whiteNoise</literal>
1176             exports are now constructors of the
1177             <literal>Sound.ALUT.Loaders.SoundDataSource</literal>
1178             datatype.
1179           </para>
1180         </listitem>
1181       </itemizedlist>
1182     </sect3>
1183
1184     <sect3>
1185       <title>arrows</title>
1186       <itemizedlist>
1187         <listitem>
1188           <para>
1189             Version number 0.2 (was 0.1).
1190           </para>
1191         </listitem>
1192         <listitem>
1193           <para>
1194             <literal>Control.Sequence</literal> has been removed in
1195             favour of the new <literal>Control.Applicative</literal>
1196             module in <literal>base</literal>.
1197           </para>
1198         </listitem>
1199       </itemizedlist>
1200     </sect3>
1201
1202     <sect3>
1203       <title>cgi</title>
1204       <itemizedlist>
1205         <listitem>
1206           <para>
1207             Version 2006.8.14.
1208           </para>
1209         </listitem>
1210         <listitem>
1211           <para>
1212             <literal>cgi</literal> is a new package, developing on
1213             what used to be <literal>Network.CGI</literal> in the
1214             <literal>network</literal> package.
1215           </para>
1216         </listitem>
1217       </itemizedlist>
1218     </sect3>
1219
1220     <sect3>
1221       <title>fgl</title>
1222       <itemizedlist>
1223         <listitem>
1224           <para>
1225             Version number 5.3 (was 5.2).
1226           </para>
1227         </listitem>
1228         <listitem>
1229           <para>
1230             <literal>Data.Graph.Inductive.Graph</literal> no longer
1231             exports <literal>UContext</literal>.
1232           </para>
1233         </listitem>
1234         <listitem>
1235           <para>
1236             <literal>Data.Graph.Inductive.Graph</literal> now exports
1237             <literal>delLEdge</literal>.
1238           </para>
1239         </listitem>
1240       </itemizedlist>
1241     </sect3>
1242
1243     <sect3>
1244       <title>GLUT</title>
1245       <itemizedlist>
1246         <listitem>
1247           <para>
1248             Version number remains 2.0.
1249           </para>
1250         </listitem>
1251         <listitem>
1252           <para>
1253             In <literal>Graphics.UI.GLUT.Initialization</literal>,
1254             <literal>DisplayMode</literal> has a new constructor
1255             <literal>WithAuxBuffers</literal> and
1256             <literal>DisplayCapability</literal> has a new constructor
1257             <literal>DisplayAux</literal>. These represent freeglut-only
1258             features.
1259           </para>
1260         </listitem>
1261         <listitem>
1262           <para>
1263             There are new examples in
1264             <filename>BOGLGP/Chapter03/OnYourOwn1.hs</filename>,
1265             <filename>RedBook/AAIndex.hs</filename>,
1266             <filename>RedBook/AARGB.hs</filename>,
1267             <filename>RedBook/AccAnti.hs</filename>,
1268             <filename>RedBook/AccPersp.hs</filename>,
1269             <filename>RedBook/Alpha3D.hs</filename>,
1270             <filename>RedBook/DOF.hs</filename>,
1271             <filename>RedBook/FogIndex.hs</filename>,
1272             <filename>RedBook/Multisamp.hs</filename>,
1273             <filename>RedBook/PointP.hs</filename>,
1274             <filename>RedBook/PolyOff.hs</filename>,
1275             <filename>RedBook/Stencil.hs</filename>,
1276             <filename>RedBook/Stroke.hs</filename> and
1277             <filename>RedBook/Torus.hs</filename>,
1278             and the examples in
1279             <filename>RedBook/Font.hs</filename> and
1280             <filename>RedBook/Histogram.hs</filename> have been
1281             improved.
1282           </para>
1283         </listitem>
1284       </itemizedlist>
1285     </sect3>
1286
1287     <sect3>
1288       <title>haskell-src</title>
1289       <itemizedlist>
1290         <listitem>
1291           <para>
1292             No change (version 1.0).
1293           </para>
1294         </listitem>
1295       </itemizedlist>
1296     </sect3>
1297
1298     <sect3>
1299       <title>HGL</title>
1300       <itemizedlist>
1301         <listitem>
1302           <para>
1303             No change (version 3.1).
1304           </para>
1305         </listitem>
1306       </itemizedlist>
1307     </sect3>
1308
1309     <sect3>
1310       <title>html</title>
1311       <itemizedlist>
1312         <listitem>
1313           <para>
1314             Version 1.0.
1315           </para>
1316         </listitem>
1317         <listitem>
1318           <para>
1319             <literal>html</literal> is a new package, developing on
1320             what used to be <literal>Text.Html</literal> and
1321             <literal>Text.Html.BlockTable</literal> in the
1322             <literal>base</literal> package.
1323           </para>
1324         </listitem>
1325         <listitem>
1326           <para>
1327             <literal>Text.Html.BlockTable</literal> exports a new
1328             function <literal>empty</literal>.
1329           </para>
1330         </listitem>
1331       </itemizedlist>
1332     </sect3>
1333
1334     <sect3>
1335       <title>HUnit</title>
1336       <itemizedlist>
1337         <listitem>
1338           <para>
1339             No change (version 1.1).
1340           </para>
1341         </listitem>
1342       </itemizedlist>
1343     </sect3>
1344
1345     <sect3>
1346       <title>mtl</title>
1347       <itemizedlist>
1348         <listitem>
1349           <para>
1350             No change (version 1.0).
1351           </para>
1352         </listitem>
1353       </itemizedlist>
1354     </sect3>
1355
1356     <sect3>
1357       <title>network</title>
1358       <itemizedlist>
1359         <listitem>
1360           <para>
1361             Version number 2.0 (was 1.0).
1362           </para>
1363         </listitem>
1364         <listitem>
1365           <para>
1366             <literal>Network.CGI</literal> has been removed; use the
1367             <literal>cgi</literal> package instead.
1368           </para>
1369         </listitem>
1370         <listitem>
1371           <para>
1372             <literal>Network.BSD</literal> no longer exports
1373             <literal>symlink</literal> or <literal>readlink</literal>;
1374             use
1375             <literal>System.Posix.Files.createSymbolicLink</literal> and
1376             <literal>System.Posix.Files.readSymbolicLink</literal>
1377             instead.
1378           </para>
1379         </listitem>
1380         <listitem>
1381           <para>
1382             <literal>Network.BSD</literal> now exports
1383             <literal>defaultProtocol</literal>.
1384           </para>
1385         </listitem>
1386         <listitem>
1387           <para>
1388             <literal>Network.Socket.SocketStatus</literal> now has a
1389             constructor <literal>ConvertedToHandle</literal> for sockets
1390             that have been converted to handles.
1391           </para>
1392         </listitem>
1393         <listitem>
1394           <para>
1395             <literal>Network.Socket.Family</literal> now has the
1396             following additional constructors:
1397             <literal>AF_NETROM</literal>,
1398             <literal>AF_BRIDGE</literal>,
1399             <literal>AF_ATMPVC</literal>,
1400             <literal>AF_ROSE</literal>,
1401             <literal>AF_NETBEUI</literal>,
1402             <literal>AF_SECURITY</literal>,
1403             <literal>AF_PACKET</literal>,
1404             <literal>AF_ASH</literal>,
1405             <literal>AF_ECONET</literal>,
1406             <literal>AF_ATMSVC</literal>,
1407             <literal>AF_IRDA</literal>,
1408             <literal>AF_PPPOX</literal>,
1409             <literal>AF_WANPIPE</literal> and
1410             <literal>AF_BLUETOOTH</literal>.
1411           </para>
1412         </listitem>
1413         <listitem>
1414           <para>
1415             In <literal>Network.URI</literal>,
1416             <literal>parseabsoluteURI</literal> has been deprecated with
1417             a new function <literal>parseAbsoluteURI</literal> taking
1418             its place.
1419           </para>
1420         </listitem>
1421       </itemizedlist>
1422     </sect3>
1423
1424     <sect3>
1425       <title>ObjectIO</title>
1426       <itemizedlist>
1427         <listitem>
1428           <para>
1429             No change (version 1.0).
1430           </para>
1431         </listitem>
1432       </itemizedlist>
1433     </sect3>
1434
1435     <sect3>
1436       <title>OpenAL</title>
1437       <itemizedlist>
1438         <listitem>
1439           <para>
1440             Version number 1.3 (was 1.2).
1441           </para>
1442         </listitem>
1443         <listitem>
1444           <para>
1445             No other change.
1446           </para>
1447         </listitem>
1448       </itemizedlist>
1449     </sect3>
1450
1451     <sect3>
1452       <title>OpenGL</title>
1453       <itemizedlist>
1454         <listitem>
1455           <para>
1456             Version number 2.1 (was 2.0).
1457           </para>
1458         </listitem>
1459         <listitem>
1460           <para>
1461             No other change.
1462           </para>
1463         </listitem>
1464       </itemizedlist>
1465     </sect3>
1466
1467     <sect3>
1468       <title>QuickCheck</title>
1469       <itemizedlist>
1470         <listitem>
1471           <para>
1472             No change (version 1.0).
1473           </para>
1474         </listitem>
1475       </itemizedlist>
1476     </sect3>
1477
1478     <sect3>
1479       <title>time</title>
1480       <itemizedlist>
1481         <listitem>
1482           <para>
1483             Version 1.0.
1484           </para>
1485         </listitem>
1486         <listitem>
1487           <para>
1488             <literal>time</literal> is a new package, for dealing with
1489             dates, times and time intervals.
1490           </para>
1491         </listitem>
1492       </itemizedlist>
1493     </sect3>
1494
1495     <sect3>
1496       <title>X11</title>
1497       <itemizedlist>
1498         <listitem>
1499           <para>
1500             Version number 1.2 (was 1.1).
1501           </para>
1502         </listitem>
1503         <listitem>
1504           <para>
1505             In <literal>Graphics.X11.Xlib.Types</literal>,
1506             <literal>XGCValues</literal> has been renamed
1507             <literal>GCValues</literal> and
1508             <literal>XSetWindowAttributes</literal> has been renamed
1509             <literal>SetWindowAttributes</literal>.
1510           </para>
1511         </listitem>
1512         <listitem>
1513           <para>
1514             In <literal>Graphics.X11.Xlib.Misc</literal>,
1515             <literal>allocaXSetWindowAttributes</literal> has been
1516             renamed <literal>allocaSetWindowAttributes</literal>.
1517           </para>
1518         </listitem>
1519         <listitem>
1520           <para>
1521             The <literal>FontStruct</literal> type has moved from
1522             <literal>Graphics.X11.Xlib.Types</literal> to
1523             <literal>Graphics.X11.Xlib.Font</literal>.
1524           </para>
1525         </listitem>
1526         <listitem>
1527           <para>
1528             The
1529             <literal>Point</literal>,
1530             <literal>Rectangle</literal>,
1531             <literal>Arc</literal>,
1532             <literal>Segment</literal> and
1533             <literal>Color</literal> types in
1534             <literal>Graphics.X11.Xlib.Types</literal>
1535             are now proper datatypes rather than synonyms for tuples.
1536             They all have a <literal>Storable</literal> instance.
1537           </para>
1538         </listitem>
1539         <listitem>
1540           <para>
1541             The <literal>Byte</literal> and <literal>Short</literal>
1542             types from <literal>Graphics.X11.Xlib.Types</literal> have
1543             been removed.
1544             The following type synonyms, which had already been marked
1545             &quot;Backwards compatibility&quot;, have also been removed:
1546             <literal>ListPoint</literal>,
1547             <literal>ListRectangle</literal>,
1548             <literal>ListArc</literal>,
1549             <literal>ListSegment</literal> and
1550             <literal>ListColor</literal>.
1551           </para>
1552         </listitem>
1553         <listitem>
1554           <para>
1555             <literal>Eq</literal>,
1556             <literal>Ord</literal>,
1557             <literal>Show</literal>,
1558             <literal>Typeable</literal> and
1559             <literal>Data</literal> are now derived for:
1560             <literal>XEvent</literal>,
1561             <literal>FdSet</literal> and
1562             <literal>TimeZone</literal> in
1563             <literal>Graphics.X11.Xlib.Event</literal>,
1564             <literal>FontStruct</literal> in
1565             <literal>Graphics.X11.Xlib.Font</literal>,
1566             <literal>XErrorEvent</literal>,
1567             <literal>XComposeStatus</literal> and
1568             <literal>XTextProperty</literal> in
1569             <literal>Graphics.X11.Xlib.Misc</literal>,
1570             <literal>Region</literal> in
1571             <literal>Graphics.X11.Xlib.Region</literal>,
1572             <literal>Display</literal>,
1573             <literal>Screen</literal>,
1574             <literal>Visual</literal>,
1575             <literal>GC</literal>,
1576             <literal>GCValues</literal>,
1577             <literal>SetWindowAttributes</literal>,
1578             <literal>Point</literal>,
1579             <literal>Rectangle</literal>,
1580             <literal>Arc</literal>,
1581             <literal>Segment</literal> and
1582             <literal>Color</literal> in
1583             <literal>Graphics.X11.Xlib.Types</literal>.
1584           </para>
1585         </listitem>
1586       </itemizedlist>
1587     </sect3>
1588
1589     <sect3>
1590       <title>xhtml</title>
1591       <itemizedlist>
1592         <listitem>
1593           <para>
1594             Version 2006.8.14.
1595           </para>
1596         </listitem>
1597         <listitem>
1598           <para>
1599             <literal>xhtml</literal> is a new package, developing on
1600             what used to be <literal>Text.Html</literal> and
1601             <literal>Text.Html.BlockTable</literal> in the
1602             <literal>base</literal> package.
1603           </para>
1604         </listitem>
1605       </itemizedlist>
1606     </sect3>
1607   </sect2>
1608
1609   <sect2>
1610     <title>Internal changes</title>
1611     <itemizedlist>
1612       <listitem>
1613         <para>
1614           GHC development now has its own integrated
1615           <ulink url="http://hackage.haskell.org/trac/ghc">wiki and bug
1616           tracker</ulink>.
1617         </para>
1618       </listitem>
1619       <listitem>
1620         <para>
1621           GHC has now moved to darcs. See
1622           <ulink
1623           url="http://hackage.haskell.org/trac/ghc/wiki/GhcDarcs">the
1624           wiki</ulink> for more details. The sources have moved around a
1625           bit within the tree as a result, most notably the GHC sources
1626           are no longer kept within a <filename>ghc/</filename>
1627           subdirectory.
1628         </para>
1629       </listitem>
1630       <listitem>
1631         <para>
1632           The native code generator is now capable of compiling loops,
1633           which gets us a big step closer to being able to compile
1634           entirely without gcc on well-supported arches.
1635         </para>
1636       </listitem>
1637     </itemizedlist>
1638   </sect2>
1639 </sect1>
1640