id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
1824	Make an extension flag for postfix operators	igloo		"From this thread: http://www.haskell.org/pipermail/cvs-ghc/2007-November/039289.html

{{{
> 2 while looking up 8.3.7, i saw this note in 8.3.6, on
>    postfix operators:
> 
>    ""(No Haskell 98 programs change their behaviour, of course.)"" 
> 
>    like so many ""of course"" notes, this is wrong, of course;-)
>    haskell98 has seq, and that makes eta-expansion observable.
> 
>    $ /cygdrive/c/ghc/ghc-6.4.1/bin/ghc -e 
>        'let (!) a = undefined in (undefined !) `seq` True'
>    True
> 
>    $ /cygdrive/c/ghc/ghc-6.6.1/bin/ghc -e 
>        'let (!) a = undefined in (undefined !) `seq` True'
>    *** Exception: Prelude.undefined

Good point. We probably ought to make it an extension and give it a -X 
flag anyway; I don't think (without having looked at the code) it should
be hard.
}}}
"	bug	closed	normal	6.10 branch	Compiler (Parser)	6.8.1	fixed			Unknown/Multiple	Unknown/Multiple		Unknown