"Found hole"

[migmit]

DON'T DO THAT!

Seriously, turn off compile-time type checking completely just to start an identifier with an underscore???

Отправлено с iPad

> 20 янв. 2015 г., в 21:39, Alex Hammel <ahammel87 at gmail.com> написал(а):
> 
> You can get typed holes to compile with a warning and a runtime error with the -fdefer-type-errors flag, if that's what you want.
> 
> However, it's perfectly legal to use identifiers which look like typed holes. This works fine on 7.8.3ghc:
> 
> _exit = print
> main = _exit 0
> 
>> On Tue, Jan 20, 2015 at 11:25 AM, Alex Hammel <ahammel87 at gmail.com> wrote:
>> The only reference to a NoTypedHoles extension google can find is this thread. Odd.
>> 
>>> On Tue, Jan 20, 2015 at 11:22 AM, Volker Wysk <verteiler at volker-wysk.de> wrote:
>>> Hi!
>>> 
>>> Am Dienstag, 20. Januar 2015, 13:44:01 schrieben Sie:
>>> > The leading underscore invokes the typed holes extension. If you want to
>>> > use such names, you'll need {-# LANGUAGE NoTypedHoles #-} as the first line
>>> > of the source file.
>>> 
>>> I get this error, when I use "{-# LANGUAGE NoTypedHoles #-}":
>>> 
>>>    ex.hs:1:14: Unsupported extension: NoTypedHoles
>>> 
>>> I'm using GHC 7.8.3. Could it be that the "NoTypedHoles" extension was added
>>> not before 7.8.4 (the most current version).
>>> 
>>> Bye
>>> Volker
>>> _______________________________________________
>>> Glasgow-haskell-users mailing list
>>> Glasgow-haskell-users at haskell.org
>>> http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
>> 
> 
> _______________________________________________
> Glasgow-haskell-users mailing list
> Glasgow-haskell-users at haskell.org
> http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.haskell.org/pipermail/glasgow-haskell-users/attachments/20150120/28287f5e/attachment.html>