weak_table/
by_ptr.rs

1use crate::compat::*;
2
3use super::traits::*;
4
5/// Wrapper struct for using pointer equality and hashes rather
6/// than pointed-to value equality and hashes.
7#[derive(Clone, Debug)]
8pub struct ByPtr<K>(K);
9
10impl<K: WeakElement> WeakElement for ByPtr<K> {
11    type Strong = K::Strong;
12
13    fn new(view: &Self::Strong) -> Self {
14        ByPtr(K::new(view))
15    }
16
17    fn view(&self) -> Option<Self::Strong> {
18        self.0.view()
19    }
20}
21
22impl<K: WeakElement> WeakKey for ByPtr<K>
23    where K::Strong: Deref
24{
25    type Key = *const <K::Strong as Deref>::Target;
26
27    fn with_key<F, R>(view: &Self::Strong, f: F) -> R
28        where F: FnOnce(&Self::Key) -> R
29    {
30        f(&(view.deref() as *const _))
31    }
32}
33
weak_table/by_ptr.rs

weak_table/
by_ptr.rs
