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use crate::reference::*;
use crate::table::Table;
use weak_table::traits::WeakElement;
use weak_table::traits::WeakKey;
use weak_table::WeakHashSet;
pub struct TableTovWeakTable<
D: std::hash::Hash + std::cmp::Eq + std::fmt::Debug,
R: Reference<D>,
RW: ReferenceWeak<D, R> + WeakKey<Key = D> + WeakElement<Strong = R>,
> {
m: WeakHashSet<RW>,
phantom_d: std::marker::PhantomData<D>,
phantom_r: std::marker::PhantomData<R>,
}
impl<D, R, RW> Default for TableTovWeakTable<D, R, RW>
where
D: std::hash::Hash + std::cmp::Eq + std::fmt::Debug,
R: Reference<D>,
RW: ReferenceWeak<D, R> + WeakKey<Key = D> + WeakElement<Strong = R>,
{
fn default() -> Self {
Self {
m: WeakHashSet::new(),
phantom_d: std::marker::PhantomData,
phantom_r: std::marker::PhantomData,
}
}
}
impl<D, R, RW> Table<D, R> for TableTovWeakTable<D, R, RW>
where
D: std::hash::Hash + std::cmp::Eq + std::fmt::Debug,
R: Reference<D>,
RW: ReferenceWeak<D, R> + WeakKey<Key = D> + WeakElement<Strong = R>,
{
fn get(&self, _hash: u64, data: &D) -> Option<R> {
self.m.get(&data)
}
fn get_or_insert<CF>(&mut self, _hash: u64, mut data: D, creation_meta: CF) -> R
where
CF: FnOnce(&mut D),
{
if let Some(r) = self.m.get(&data) {
return r;
}
creation_meta(&mut data);
let obj = R::new(data);
self.m.insert(R::strong_clone(&obj));
obj
}
}