weak-table-rs: weak hash maps and sets for Rust

This crate defines several kinds of weak hash maps and sets. See the full API documentation.

Usage

It’s on crates.io, so you can add

toml [dependencies] weak-table = "0.1.0"

to your Cargo.toml and

rust extern crate weak_table;

to your crate root.

Examples

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::new("a".tostring()); let b = Arc::new("b".tostring());

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") ); ```