X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=docs%2Fusers_guide%2F6.6-notes.xml;h=bd4561960ef85238938d87d6f3215032b03f6874;hb=aedb94f5f220b5e442b23ecc445fd38c8d9b6ba0;hp=9b215b0f5531577fa62bc0182e10137dff29529c;hpb=28314aa42433b174156bb870d08af745662b99bb;p=ghc-hetmet.git
diff --git a/docs/users_guide/6.6-notes.xml b/docs/users_guide/6.6-notes.xml
index 9b215b0..bd45619 100644
--- a/docs/users_guide/6.6-notes.xml
+++ b/docs/users_guide/6.6-notes.xml
@@ -11,24 +11,24 @@
when you compile with , you now get
an RTS flag that allows you to specify the
number of OS threads that GHC should use. Defaults to 1.
- See and and .
- GHC's modules are now also bundled into a
- ghc package, allowing programs to make use
- of GHC as a library. The interface has not yet been properly
- designed, so is subject to change.
+ GHC now handles impredicative polymorphism; see .
- GHC now handles impredicative polymorphism and there are
- changes to the way scoped type variables work; see
- Simon's e-mail
- for more details.
+ There are significant changes to the way scoped type variables work,
+ and some programs that used to compile may no longer do so.
+ The new story is documented in .
+ ( Simon's e-mail
+ gives some background, but the user manual should be complete (tell
+ us if not), and
+ certainly takes precedence if there is any conflict.)
@@ -41,6 +41,7 @@
f (x, y) | x `seq` False = undefined
| otherwise = [x,y]
+ See for more details.
@@ -61,6 +62,11 @@
ignored in comments, so ASCII code with comments in, for
example, Latin-1 will also work.
+
+
+ A way to have Latin-1 source files pre-processed by GHC is
+ described in .
+
@@ -96,6 +102,8 @@
performance when a lot of memory is taken up by
STArrays, IOArrays,
STRefs or IORefs.
+ For more details see
+ trac bug #650.
@@ -163,7 +171,6 @@
,
,
,
- ,
,
,
,
@@ -184,6 +191,16 @@
+ The
+
+ option is now called
+ .
+ (the old name is still accepted for backwards compatibility,
+ but will be removed in the future).
+
+
+
+
The
flag has been removed.
@@ -250,8 +267,14 @@
MyIO t
rather than just
IO t.
+ See
+ GHC's mechansim for deriving user-defined classes
+ for newtypes has been further generalised, to multi-parameter type
+ classes and higher-kinded types. See .
+
By default, pattern bindings in GHC are now monomorphic.
@@ -281,9 +304,28 @@
- It is now possible, with the -I RTS flag,
- to control the amount of idle time that happens before a major
- GC is performed.
+ Linear implicit parameters have been scheduled for removal for some
+ time. In 6.6 we've removed them from the user manual, and they may
+ well disappear from the compiler itself in 6.6.1.
+
+
+
+
+ If the program is idle for a certain amount of time then GHC
+ will now take the opportunity to do a major garbage collection.
+ The amount of idle time that is required before that happens
+ is controlled by the new -I RTS flag.
+ There is more detail in .
+
+
+
+
+ It is now possible to control the frequency that the RTS clock
+ ticks at with the new -V RTS flag. This is
+ normally handled automatically by other flags, but this flag
+ is needed if you want to increase the resolution of the time
+ profiler.
+ For more details see .
@@ -294,8 +336,31 @@
- The flag can now be used with
- , and hence can be used by cabal.
+ The flag, which when used to compile
+ libraries means executables using the library will be smaller,
+ can now be used with and hence
+ can be used by cabal.
+ See for more information.
+
+
+
+
+ Template Haskell used to have limited support for type signatures in
+ patterns, but since that design is in flux for Haskell (let alone
+ Template Haskell), we've removed type signatures in patterns from
+ Template Haskell.
+
+
+
+
+ GHC now supports postfix operators, as a simple generalisation of
+ left sections ().
+
+
+
+
+ Parallel arrays, as enabled by -fparr, no
+ longer work. They'll be coming back shortly, in full glory.
@@ -327,6 +392,23 @@
See for more information.
+
+
+ GHCi now has an :edit command which pops
+ up an editor on the most recently loaded file, or a
+ specified file. See for
+ more information.
+
+
+
+
+ GHCi now invokes print by default on the
+ result of IO actions and bindings at the prompt. This is
+ occasionally not what you want, so it can be disabled (at
+ least for bindings) with
+ :set -fno-print-bind-result. See .
+
@@ -352,7 +434,7 @@
- Version number 2.0 (was 1.0).
+ Version number 2.1 (was 1.0).
@@ -447,13 +529,16 @@
inline which, provided the RHS is visible
to the compiler, forcibly inlines its argument.
Otherwise, it acts like id.
+ For more details, see .
GHC.Exts now provides a function
- lazy which forces GHC to think that its
- argument is lazy in its first argument.
+ lazy, where lazy f
+ behaves like f, except GHC is forced
+ to believe that it is lazy in its first argument.
+ For more details, see .
@@ -740,7 +825,7 @@
- Version number 1.1.5 (was 1.1.4).
+ Version number 1.1.6 (was 1.1.4).
@@ -763,24 +848,6 @@
- Added cabal-setup, a user interface to
- building and installing Cabal packages.
-
-
-
-
- Added cabal-install, an automated
- installer for cabal packages.
-
-
-
-
- There is now a Network.Hackage hierarchy
- for code needed by hackage, the package server.
-
-
-
-
There are now modules
Distribution.Simple.compiler
for each of GHC, NHC,
@@ -938,7 +1005,7 @@
- Version number 2.0 (was 1.0).
+ Version number 2.1 (was 1.0).
@@ -1044,7 +1111,7 @@
- Version number 2.0 (was 1.0).
+ Version number 2.1 (was 1.0).
@@ -1199,6 +1266,14 @@
network package.
+
+
+ The Network.CGI.Compat module provides
+ a similar interface to the old Network.CGI
+ module, but it uses Text.XHtml rather than
+ Text.Html.
+
+
@@ -1592,6 +1667,24 @@
+ GHC As A Library
+
+ Version number 6.6.
+
+
+ The internal modules of GHC are now available as a library, package
+ name ghc.
+ The interface has not been designed with use by other programs
+ in mind, so expect the API to vary radically in future
+ releases.
+
+
+ An introduction to using the library can be found
+ on the wiki.
+
+
+
+ Internal changes