[Haskell-beginners] About ! before a type signature
bob at redivi.com
Fri Jun 6 13:05:42 UTC 2014
That declares those fields to be strict. See also
On Friday, June 6, 2014, Song Zhang <vxanica at gmail.com> wrote:
> This is about syntax of Haskell.
> I am reading the source code of Yampa. I find that a definition like the
> data SF' a b where
> SFArr :: !(DTime -> a -> Transition a b) -> !(FunDesc a b) -> SF' a b
> in Yampa.hs.
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