Trait WritableHashSetExt 

pub trait WritableHashSetExt<V, H>: Writable<Target = HashSet<V, H>>
where
    V: 'static,
    H: 'static,
{
    // Provided methods
    fn clear(&mut self) { ... }
    fn retain(&mut self, f: impl FnMut(&V) -> bool) { ... }
    fn insert(&mut self, k: V) -> bool
       where V: Eq + Hash,
             H: BuildHasher { ... }
    fn extend(&mut self, iter: impl IntoIterator<Item = V>)
       where V: Eq + Hash,
             H: BuildHasher { ... }
    fn remove(&mut self, k: &V) -> bool
       where V: Eq + Hash,
             H: BuildHasher { ... }
}

Available on crate feature prelude only.

An extension trait for Writable<HashSet<V, H>> that provides some convenience methods.

Provided Methods

fn clear(&mut self)

Clear the hash set.

fn retain(&mut self, f: impl FnMut(&V) -> bool)

Retain only the elements specified by the predicate.

fn insert(&mut self, k: V) -> bool

where V: Eq + Hash, H: BuildHasher,

Inserts a value into the set. Returns true if the value was not already present.

fn extend(&mut self, iter: impl IntoIterator<Item = V>)

where V: Eq + Hash, H: BuildHasher,

Extends the set with the values from the given iterator.

fn remove(&mut self, k: &V) -> bool

where V: Eq + Hash, H: BuildHasher,

Removes a value from the set. Returns true if the value was present.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<V, H, R> WritableHashSetExt<V, H> for R

where V: 'static, H: 'static, R: Writable<Target = HashSet<V, H>>,