Struct Map

pub struct Map(/* private fields */);

A type map to store values by type.

Implementations

impl Map

pub fn new() -> Self

Create an empty Context.

pub fn insert<T: Send + Sync + 'static>(&mut self, value: T) -> Option<T>

Insert a type into the Context.

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

Remove a type from the Context.

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

Get a reference to a type from the Context.

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

Get a mutable reference to a type from the Context.

pub fn clear(&mut self)

Clear the Context.

pub fn is_empty(&self) -> bool

Check if the Context is empty.

pub fn len(&self) -> usize

Get the number of elements in the Context.

pub fn extend(&mut self, other: Self)

Extend the Context with the given Context.

Trait Implementations

impl Debug for Map

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

Formats the value using the given formatter.

impl Default for Map

fn default() -> Map

Returns the “default value” for a type.