[Haskell-cafe] The Good, the Bad and the GUI

[John Lato]

I would suggest  { someMaybeField :: f (Maybe Value) }, or perhaps newtype
MaybeValue = MV (Maybe Value).


On Thu, Aug 14, 2014 at 12:19 AM, Tom Ellis <
tom-lists-haskell-cafe-2013 at jaguarpaw.co.uk> wrote:

> On Wed, Aug 13, 2014 at 05:21:28PM -0700, John Lato wrote:
> > On Wed, Aug 13, 2014 at 4:21 PM, Tom Ellis
> > >     data LineItem = LineItem { name :: Maybe String
> > >                              , quantity :: Maybe Quantity
> > >                              , price :: Maybe Price }
> >
> > Rather than this definition, what about something like:
> >
> >     data LineItemF f = LineItem
> >         { name :: f String
> >         , quantity :: f Quantity
> >         , price :: f Price }
>
> It seems Wojtek already objected to this approach, though perhaps that
> objection could be overcome
>
>     http://www.haskell.org/pipermail/haskell-cafe/2014-August/115528.html
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