Trait StoreRead 

pub trait StoreRead: StoreBase {
    // Required methods
    fn get(&self, key: &Self::Key) -> Option<Self::Value>;
    fn len(&self) -> usize;

    // Provided method
    fn is_empty(&self) -> bool { ... }
}

Required Methods

fn get(&self, key: &Self::Key) -> Option<Self::Value>

Returns the value associated with key from the Store

Arguments:

• key: the key indexing the object

Returns:

• Some(value), if the value exists
• None otherwise

fn len(&self) -> usize

Returns the number of elements in the Store

Provided Methods

fn is_empty(&self) -> bool

Returns true, if the store is empty

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl<K: Ord, V: Clone> StoreRead for MemoryStore<K, V>