Re: new qualified operators

On 15/07/2010 13:46, Christian Maeder wrote:

Hi,

seeing http://www.haskell.org/ghc/docs/6.12.2/html/users_guide/syntax-extns.html#ne...

Could you add:

"Spaces are not allowed in new qualified operators!"

For

{-# LANGUAGE NewQualifiedOperators #-}

f1 = (+) f2 = ( +) f3 = (+ ) f4 = Prelude.(+) f5 = Prelude.( +) f6 = Prelude.(+ )

f1 - f4 are ok, but f5 and f6 are rejected by ghc-6.12.3 with:

Not in scope: data constructor `Prelude'

Yes, it's really a bug, but it was difficult to make this consistent while retaining support for the old syntax. I expect that we'll deprecate this extension anyway, since the Haskell 2010 committee rejected it as a proposal. Cheers, Simon