nimvar
num: int = 100
num_ptr: pointer = num.addr
echo repr(num_ptr) # 0x1093b9430 ptr[T] nimvar
num: int = 100
num_ptr: ptr int = num.addr
echo repr(num_ptr) # ref 0x10c975430 --> 100 ref[T] nimvar
num_ref: ref int
proc ref_test(num: ref int) =
echo repr(num)
num_ref = new int
num_ref[] = 100
ref_test(num_ref) # ref 0x10ba71048 --> 100