But in my program, I did not define "--++".
 
Also in GHCI,
Prelude> :t (--++)
No in scope: '--++'
Prelude> :t (+)
(+) :: (Num a) => a -> a -> a
 
Thanks,
 
Hong

On Wed, Sep 30, 2009 at 7:05 PM, Daniel Peebles <pumpkingod@gmail.com> wrote:
I don't think it's a bug. --++ is a valid operator, whereas --
introduces a comment.

In GHCI:

Prelude> let (--++) = (+) in 5 --++ 6
11

Hope this helps,
Dan


On Wed, Sep 30, 2009 at 7:52 PM, Hong Yang <hyangfji@gmail.com> wrote:
> Hi,
>
> I got an error if one of lines reads "--++ bla bla bla" where I tried to
> comment, but "-- ++ bla bla bla" (notice the space after "--") is OK.
>
> Do you think this revealed a tiny bug in the GHC compiler (I am using
> Windows Haskell Platform 2009.2.0.2)?
>
> Thanks,
>
> Hong
>
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