Struct Contexts

pub struct Contexts { /* private fields */ }

A context for a view.

Implementations

impl Contexts

pub fn new() -> Contexts

Create a new context.

pub fn len(&self) -> usize

Get the number of contexts.

pub fn is_empty(&self) -> bool

Check if there are no contexts.

pub fn contains<T>(&self) -> bool

where T: Any,

Check if the context is present.

pub fn insert<T>(&mut self, context: T) -> Option<T>

where T: Any,

Push a context.

pub fn remove<T>(&mut self) -> Option<T>

where T: Any,

Pop a context.

pub fn get<T>(&self) -> Option<&T>

where T: Any,

Get a context.

pub fn get_mut<T>(&mut self) -> Option<&mut T>

where T: Any,

Get a mutable context.

pub fn get_or_default<T>(&mut self) -> &mut T

where T: Any + Default,

Get a context or insert a default.

Trait Implementations

impl Debug for Contexts

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

Formats the value using the given formatter.

impl Default for Contexts

fn default() -> Contexts

Returns the “default value” for a type.