Why not allow empty record updates?

[Ian Lynagh]

On Tue, Nov 15, 2011 at 08:34:01AM +0000, Malcolm Wallace wrote:
> 
> On 14 Nov 2011, at 22:09, Simon Peyton-Jones wrote:
> 
> > Trouble is, what type does this have?
> > 
> > 	f x = x {}
> 
> f :: a -> a

That wouldn't help the original poster, as it is incompatible with
f :: Foo Clean -> Foo Dirty


Thanks
Ian