Type Definition obj_pool::OptionObjId

type OptionObjId = Optioned<ObjId>;

Optimization for Option<ObjId> which treats ObjId of u32::max_value() as None. It's safe to store any ObjPool ObjId in this wrapper as long as the size of the ObjPool is less than u32::max_value() / 2.

use obj_pool::{ObjPool, ObjId, OptionObjId};

let mut obj_pool = ObjPool::default();

let mut n: OptionObjId = obj_pool.insert(10).into();

assert!(n.is_some());
assert_eq!(10, obj_pool[n.unwrap()]);

n = OptionObjId::none();
assert!(n.is_none());
assert_eq!(None, n.into_option());