Hello,
I apologize if I'm doing something totally wrong here, but hopefully someone
can point me in the right direction. I have an application in which I would
like to pass a pointer to a mutable object into and allow it to be changed by
another set of procedures.
A brief mocked up example would be like below:
type
thing = object
text: string
proc show(obj: ptr thing): ptr thing =
return obj
proc change(obj: var ptr thing) =
obj.text = "Goodbye World!"
var x = thing()
x.text = "Hello World!"
echo show(addr x).text
change(var addr x)
echo x.text
Run
This results in the error :
> nimtest.nim(16, 17) Error: expected type, but got: addr x
Line 16: being the `change(var addr x)` line
So, my question is: what am I doing wrong? Is what I am attempting even
possible? I've tried a few different approached, even reading the forums here
pointing me down a `cast[var ptr thing](addr x)` route - but that results in an
`out of memory exception` I'd like to do this as one of the procedures down the
line updates a sequence of RSS feeds depending on files in a directory if/when
they change, last feed id, etc.
Again, apologies if I'm just being an idiot and trying to do something stupid -
but I'd be happy to be pointed in the right direction!
Thanks!
