Trait MapCollection 

pub trait MapCollection {
    type Key;
    type Value;
    type Iter<'a>: Iterator<Item = (&'a Self::Key, &'a Self::Value)> + 'a
       where Self: 'a;

    // Required methods
    fn iter(&self) -> Self::Iter<'_>;
    fn len(&self) -> usize;

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

Iteration contract for generated map wrappers.

Required Associated Types

type Key

Key type.

type Value

Value type.

type Iter<'a>: Iterator<Item = (&'a Self::Key, &'a Self::Value)> + 'a where Self: 'a

Borrowed iterator type.

Required Methods

fn iter(&self) -> Self::Iter<'_>

Iterate over entries.

fn len(&self) -> usize

Return the number of entries.

Provided Methods

fn is_empty(&self) -> bool

Return whether this map is empty.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors

impl MapCollection for Map

type Key = String

type Value = Value

type Iter<'a> = Iter<'a, String, Value> where Self: 'a