I use that all the time. It is for typechecking things passed to C functions. Greets, Branimir. On 11/6/18 5:35 PM, Guru Devanla wrote:
Hello Haskell-Cafe,
I have been recently studying the XMonad code and some related types available in the X11 bindings library.
I came across this type:
newtype XEvent = XEvent XEventPtr
type XEventPtr = Ptr http://hackage.haskell.org/package/base-4.10.1.0/docs/Foreign-Ptr.html#t:Ptr XEvent http://hackage.haskell.org/package/X11-1.9/docs/Graphics-X11-Xlib-Event.html...
Available here: http://hackage.haskell.org/package/X11-1.9/docs/Graphics-X11-Xlib-Event.html...
It seems that this type is circular here. how does one use this type? Is it possible to create a value out of this type? What is the use of this type?
Please could someone help me wrap my head around this?
Thanks
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