When use hash function with ref object hashset not working correctly(if i
remove ref (like pointer) its ok) , but when i've add == (equal) overload
function its working perfect. How is nim language compare to pointer object?
does it use adress of memory or something like that?
Example code like this:
type NM = ref object of RootObj
name*:string
# i added this for working correctly
proc `==` (a,b: NM):bool =
a.name == b.name
proc hash(nm:NM):Hash =
return !$nm.name.hash
proc `$`(nm:NM):string =
return nm.name & " hash: " & $nm.hash
var b = initHashSet[NM]()
var
f = NM(name: "XX")
g = NM(name: "YY")
h = NM(name: "XX")
b.incl(f)
b.incl(g)
b.incl(f)
b.incl(g)
# b.incl(h)
echo b.contains(h)
echo $b
Run
