Trait HashSetHandle 

pub trait HashSetHandle<K>
where
    K: Clone + Eq + Hash + Send + Sync + 'static,
{
    // Required methods
    async fn insert(&self, val: K) -> bool;
    async fn is_empty(&self) -> bool;
}

Extension methods for Handle<HashSet<K>>, exposed as HashSetHandle.

Required Methods

async fn insert(&self, val: K) -> bool

Adds a value to the set. Returns whether the value was newly inserted. That is:

• If the set did not previously contain this value, true is returned.
• If the set already contained this value, false is returned, and the set is not modified: original value is not replaced, and the value passed as argument is dropped.

Examples

let handle = Handle::new(HashSet::new());
let res = handle.insert(10).await;
assert!(res);

let res = handle.insert(10).await;
assert!(!res);

async fn is_empty(&self) -> bool

Returns true if the set contains no elements.

Examples

let handle = Handle::new(HashSet::<i32>::new());
assert!(handle.is_empty().await);

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<K, __V> HashSetHandle<K> for Handle<HashSet<K>, __V>

where K: Clone + Eq + Hash + Send + Sync + 'static,

Extension methods for Handle<HashSet<K>>, exposed as HashSetHandle.