Trait value_trait::prelude::ObjectTrait

pub trait ObjectTrait {
    type Key: ?Sized;
    type Element;

    // Required methods
    fn get<Q>(&self, k: &Q) -> Option<&Self::Element>
       where Self::Key: Borrow<Q> + Hash + Eq,
             Q: ?Sized + Hash + Eq + Ord;
    fn iter<'i>(
        &'i self
    ) -> Box<dyn Iterator<Item = (&Self::Key, &Self::Element)> + 'i>;
    fn keys<'i>(&'i self) -> Box<dyn Iterator<Item = &Self::Key> + 'i>;
    fn values<'i>(&'i self) -> Box<dyn Iterator<Item = &Self::Element> + 'i>;
    fn len(&self) -> usize;

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

A trait for the minimal common functionality of a vale object

Required Associated Types

type Key: ?Sized

The key in the objects

type Element

The values in the object

Required Methods

fn get<Q>(&self, k: &Q) -> Option<&Self::Element>

where Self::Key: Borrow<Q> + Hash + Eq, Q: ?Sized + Hash + Eq + Ord,

Gets a ref to a value based on a key, returns None if the current Value isn’t an Object or doesn’t contain the key it was asked for.

fn iter<'i>( &'i self ) -> Box<dyn Iterator<Item = (&Self::Key, &Self::Element)> + 'i>

Iterates over the key value paris

fn keys<'i>(&'i self) -> Box<dyn Iterator<Item = &Self::Key> + 'i>

Iterates over the keys

fn values<'i>(&'i self) -> Box<dyn Iterator<Item = &Self::Element> + 'i>

Iterates over the values

fn len(&self) -> usize

Number of key/value pairs

Provided Methods

fn is_empty(&self) -> bool

Returns if the array is empty

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl<MapK, MapE, S> Object for HashMap<MapK, MapE, S>

where MapK: Hash + Eq, S: BuildHasher + Default,

type Key = MapK

type Element = MapE

fn get<Q>(&self, k: &Q) -> Option<&Self::Element>

where Self::Key: Borrow<Q> + Hash + Eq, Q: ?Sized + Hash + Eq + Ord,

fn iter<'i>( &'i self ) -> Box<dyn Iterator<Item = (&Self::Key, &Self::Element)> + 'i>

fn keys<'i>(&'i self) -> Box<dyn Iterator<Item = &Self::Key> + 'i>

fn values<'i>(&'i self) -> Box<dyn Iterator<Item = &Self::Element> + 'i>

fn len(&self) -> usize

impl<MapK, MapE, S: BuildHasher> Object for HashMap<MapK, MapE, S>

where MapK: Hash + Eq,

type Key = MapK

type Element = MapE

fn get<Q>(&self, k: &Q) -> Option<&Self::Element>

where Self::Key: Borrow<Q> + Hash + Eq, Q: ?Sized + Hash + Eq + Ord,

fn iter<'i>( &'i self ) -> Box<dyn Iterator<Item = (&Self::Key, &Self::Element)> + 'i>

fn keys<'i>(&'i self) -> Box<dyn Iterator<Item = &Self::Key> + 'i>

fn values<'i>(&'i self) -> Box<dyn Iterator<Item = &Self::Element> + 'i>

fn len(&self) -> usize

Implementors