[Haskell-cafe] advanced class constraints in Haskell 98?
ross at soi.city.ac.uk
Thu Jan 8 18:47:36 EST 2009
On Thu, Jan 08, 2009 at 10:27:59PM +0100, Henning Thielemann wrote:
> A nice. I jumped into 4.3 and found
> scontext -> simpleclass
> | (simpleclass_1, ..., simpleclass_n)
> simpleclass -> qtycls tyvar
> So it must be 'atype' instead of 'tyvar'? Haskell 98 is really mighty.
Oh. Don't I look silly? You were absolutely right, it's not Haskell 98.
Actually Hugs does reject it without flags. Maybe you have a -98 stored
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