Struct extensions::Extensions

pub struct Extensions { /* fields omitted */ }

A type map of extensions.

Methods

impl Extensions

pub fn new() -> Extensions

Create an empty Extensions.

pub fn insert<T: 'static>(&mut self, val: T) -> Option<T>

Insert a value into this Extensions.

If a extension of this type already exists, it will be returned.

pub fn contains<T: 'static>(&self) -> bool

Check if container contains typed value

pub fn get<T: 'static>(&self) -> Option<&T>

Get a reference to a typed value previously inserted on this Extensions.

pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T>

Get a mutable reference to a typed value previously inserted on this Extensions.

pub fn remove<T: 'static>(&mut self) -> Option<T>

Remove a typed value from this Extensions.

If a value of this type exists, it will be returned.

pub fn clear(&mut self)

Clear the Extensions of all inserted values.

Trait Implementations

impl Default for Extensions

fn default() -> Extensions

Returns the "default value" for a type.

impl Debug for Extensions

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.