Hi,
When reading this code in ghci, I get an
ambiguous type at last line:
{-# LANGUAGE PolymorphicComponents #-}
{-# LANGUAGE RankNTypes #-}
import Graphics.UI.Gtk
data Test = Test (forall w. WidgetClass w => w)
toAction (Test w) = toWidget w
It's interesting that if I replace 'Integral' for
'WidgetClass' and 'toInteger' for 'toWidget', I
get no error messages, and I see no essencial
diference between both classes and both functions.
Do you know what am I missing?
Thanks,
Maurício
_______________________________________________
Haskell-Cafe mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/haskell-cafe
