Ptr Region Deref Overload Test

region_overload.nim

type
  Automatic = object
  Explicit = object
  
  AutoRef[T] = ptr[Automatic, T]
  ExplicitRef[T] = ptr[Explicit, T]

proc `[]`[T](r:AutoRef[T]): var T =
  echo "Automatic"
  return r[]

proc `[]`[T](r:ExplicitRef[T]): var T =
  echo "Explicit"
  return r[]

var ap = cast[AutoRef[int]](alloc sizeof int)
var ep = cast[ExplicitRef[int]](alloc sizeof int)
ap[] = 123
ep[] = 456

# explict use works..
let a: int = region_overload.`[]`(ap)
let e: int = region_overload.`[]`(ep)

# these dont tho..
#let a: int = ap[]
#let e: int = ep[]

echo "A: ", a
echo "E: ", e

dealloc cast[pointer](ap)
dealloc cast[pointer](ep)