Background
~~~~~~~~~~
-Haskell is a standard lazy functional programming language; the
-current language version is Haskell 98, agreed in December 1998 and
-revised December 2002.
+Haskell is a standard lazy functional programming language.
GHC is a state-of-the-art programming suite for Haskell. Included is
an optimising compiler generating good code for a variety of
| isDigit c -> cont (TKrational (fromInteger sgn * r)) rest'
where ((r,rest'):_) = readFloat (digits ++ ('.':c:rest))
-- When reading a floating-point number, which is
- -- a bit complicated, use the Haskell 98 library function
+ -- a bit complicated, use the standard library function
+ -- "readFloat"
(digits,rest) -> cont (TKinteger (sgn * (read digits))) rest
lexName :: (a -> String -> b) -> (String -> a) -> String -> b
| RATIONAL { sL (getLoc $1) (HsOverLit $! mkHsFractional (getRATIONAL $1) placeHolderType) }
-- N.B.: sections get parsed by these next two productions.
- -- This allows you to write, e.g., '(+ 3, 4 -)', which isn't correct Haskell98
- -- (you'd have to write '((+ 3), (4 -))')
+ -- This allows you to write, e.g., '(+ 3, 4 -)', which isn't
+ -- correct Haskell (you'd have to write '((+ 3), (4 -))')
-- but the less cluttered version fell out of having texps.
| '(' texp ')' { LL (HsPar $2) }
| '(' tup_exprs ')' { LL (ExplicitTuple $2 Boxed) }
-- Note [Parsing sections]
-- ~~~~~~~~~~~~~~~~~~~~~~~
-- We include left and right sections here, which isn't
- -- technically right according to Haskell 98. For example
- -- (3 +, True) isn't legal
+ -- technically right according to the Haskell standard.
+ -- For example (3 +, True) isn't legal.
-- However, we want to parse bang patterns like
-- (!x, !y)
-- and it's convenient to do so here as a section
Note [Infix type variables]
~~~~~~~~~~~~~~~~~~~~~~~~~~~
-In Haskell 98 you can say
+With TypeOperators you can say
f :: (a ~> b) -> b
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Foreign function interface (FFI)
</title>
- <para>GHC (mostly) conforms to the Haskell 98 Foreign Function Interface
- Addendum 1.0, whose definition is available from <ulink url="http://www.haskell.org/"><literal>http://www.haskell.org/</literal></ulink>.</para>
+ <para>GHC (mostly) conforms to the Haskell Foreign Function Interface,
+ whose definition is part of the Haskell Report on <ulink url="http://www.haskell.org/"><literal>http://www.haskell.org/</literal></ulink>.</para>
- <para>To enable FFI support in GHC, give the <option>-XForeignFunctionInterface</option><indexterm><primary><option>-XForeignFunctionInterface</option></primary>
+ <para>FFI support is enabled by default, but can be enabled or disabled explicitly with the <option>-XForeignFunctionInterface</option><indexterm><primary><option>-XForeignFunctionInterface</option></primary>
</indexterm> flag.</para>
<para>GHC implements a number of GHC-specific extensions to the FFI
<indexterm><primary>language, GHC</primary></indexterm>
<indexterm><primary>extensions, GHC</primary></indexterm>
As with all known Haskell systems, GHC implements some extensions to
-the language. They are all enabled by options; by default GHC
-understands only plain Haskell 98.
+the language. They can all be enabled or disabled by commandline flags
+or language pragmas. By default GHC understands the most recent Haskell
+version it supports, plus a handful of extensions.
</para>
<para>
</indexterm>
<para>The language option flags control what variation of the language are
- permitted. Leaving out all of them gives you standard Haskell
- 98.</para>
+ permitted.</para>
<para>Language options can be controlled in two ways:
<itemizedlist>
<listitem><para> <literal>'x'#</literal> has type <literal>Char#</literal></para> </listitem>
<listitem><para> <literal>"foo"#</literal> has type <literal>Addr#</literal></para> </listitem>
<listitem><para> <literal>3#</literal> has type <literal>Int#</literal>. In general,
- any Haskell 98 integer lexeme followed by a <literal>#</literal> is an <literal>Int#</literal> literal, e.g.
+ any Haskell integer lexeme followed by a <literal>#</literal> is an <literal>Int#</literal> literal, e.g.
<literal>-0x3A#</literal> as well as <literal>32#</literal></para>.</listitem>
<listitem><para> <literal>3##</literal> has type <literal>Word#</literal>. In general,
- any non-negative Haskell 98 integer lexeme followed by <literal>##</literal>
+ any non-negative Haskell integer lexeme followed by <literal>##</literal>
is a <literal>Word#</literal>. </para> </listitem>
<listitem><para> <literal>3.2#</literal> has type <literal>Float#</literal>.</para> </listitem>
<listitem><para> <literal>3.2##</literal> has type <literal>Double#</literal></para> </listitem>
option. In the new syntax, the prefix form of a qualified
operator is
written <literal><replaceable>module</replaceable>.(<replaceable>symbol</replaceable>)</literal>
- (in Haskell 98 this would
+ (without NewQualifiedOperators this would
be <literal>(<replaceable>module</replaceable>.<replaceable>symbol</replaceable>)</literal>),
and the infix form is
written <literal>`<replaceable>module</replaceable>.(<replaceable>symbol</replaceable>)`</literal>
- (in Haskell 98 this would
+ (without NewQualifiedOperators this would
be <literal>`<replaceable>module</replaceable>.<replaceable>symbol</replaceable>`</literal>.
For example:
<programlisting>
like <literal>Prelude..</literal>. For example,
when <literal>NewQualifiedOperators</literal> is on, it is possible to
write the enumerated sequence <literal>[Monday..]</literal>
- without spaces, whereas in Haskell 98 this would be a
+ without spaces, whereas without NewQualifiedOperators this would be a
reference to the operator ‘<literal>.</literal>‘
from module <literal>Monday</literal>.</para>
- <para>When <option>-XNewQualifiedOperators</option> is on, the old Haskell
- 98 syntax for qualified operators is not accepted, so this
- option may cause existing Haskell 98 code to break.</para>
+ <para>When <option>-XNewQualifiedOperators</option> is on, the old
+ syntax for qualified operators is not accepted, so this
+ option may cause existing code to break.</para>
</sect2>
when (verb >= 2) $
do hPutStr stderr "Glasgow Haskell Compiler, Version "
hPutStr stderr cProjectVersion
- hPutStr stderr ", for Haskell 98, stage "
+ hPutStr stderr ", stage "
hPutStr stderr cStage
hPutStr stderr " booted by GHC version "
hPutStrLn stderr cBooterVersion
*
* (c) The GHC Team, 2007-2009
*
- * File locking support as required by Haskell 98
+ * File locking support as required by Haskell
*
* Do not #include this file directly: #include "Rts.h" instead.
*
# $(GHC), $(HBC) and $(NHC) point to installed versions of the relevant
# compilers, if available.
#
-# $(HC) is a generic Haskell 98 compiler, set to $(GHC) by default.
# $(MKDEPENDHS) is the Haskell dependency generator (ghc -M).
#
# NOTE: Don't override $(GHC) in build.mk, use configure --with-ghc instead
*
* (c) The GHC Team, 2005
*
- * RTS entry points as mandated by the FFI addendum to the Haskell 98 report
+ * RTS entry points as mandated by the FFI section of the Haskell report
*
* ---------------------------------------------------------------------------*/
*
* (c) The GHC Team, 2007
*
- * File locking support as required by Haskell 98
+ * File locking support as required by Haskell
*
* ---------------------------------------------------------------------------*/
*
* (c) The GHC Team, 2007
*
- * File locking support as required by Haskell 98
+ * File locking support as required by Haskell
*
* ---------------------------------------------------------------------------*/
projects / ghc-hetmet.git / commitdiff