This crate defines several kinds of weak hash maps and sets. See the full API documentation for details.
This crate supports Rust version 1.23 and later.
Here we create a weak hash set and demonstrate that it forgets elements whose reference counts expire:
```rust use weak_table::WeakHashSet; use std::sync::{Arc, Weak};
type Table = WeakHashSet
let mut set = Table::new();
let a = Arc::
set.insert(a.clone());
assert!( set.contains("a") ); assert!( ! set.contains("b") );
set.insert(b.clone());
assert!( set.contains("a") ); assert!( set.contains("b") );
drop(a);
assert!( ! set.contains("a") ); assert!( set.contains("b") ); ```