Trait ObservableFeatures 

pub trait ObservableFeatures {
    type Feature;

    // Required methods
    fn present_features(&self) -> impl Iterator<Item = &Self::Feature>;
    fn excluded_features(&self) -> impl Iterator<Item = &Self::Feature>;

    // Provided methods
    fn present_feature_count(&self) -> usize { ... }
    fn excluded_feature_count(&self) -> usize { ... }
}

Common functionalities for containers of Observable features.

Required Associated Types

type Feature

The feature.

Required Methods

fn present_features(&self) -> impl Iterator<Item = &Self::Feature>

Get an iterator over features that were observed in the investigated item.

fn excluded_features(&self) -> impl Iterator<Item = &Self::Feature>

Get an iterator over features whose presence was specifically excluded in the investigated item.

Provided Methods

fn present_feature_count(&self) -> usize

Get the number of observed features.

fn excluded_feature_count(&self) -> usize

Get the number of features whose presence was specifically excluded.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementations on Foreign Types

impl<T, const N: usize> ObservableFeatures for [T; N]

where T: Observable,

type Feature = T

fn present_features(&self) -> impl Iterator<Item = &Self::Feature>

fn excluded_features(&self) -> impl Iterator<Item = &Self::Feature>

impl<T> ObservableFeatures for &[T]

where T: Observable,

type Feature = T

fn present_features(&self) -> impl Iterator<Item = &Self::Feature>

fn excluded_features(&self) -> impl Iterator<Item = &Self::Feature>

impl<T> ObservableFeatures for Vec<T>

where T: Observable,

type Feature = T

fn present_features(&self) -> impl Iterator<Item = &Self::Feature>

fn excluded_features(&self) -> impl Iterator<Item = &Self::Feature>

Implementors