DefaultContext

Struct DefaultContext 

Source
pub struct DefaultContext { /* private fields */ }
Expand description

A Context implementation based on typemap::TypeMap.

Trait Implementations§

Source§

impl Context for DefaultContext

Source§

type Scope = Scope

Identifies a layer of scope.
Source§

fn start_scope<T: 'static>(&mut self) -> Scope

Pushes the type to the scope stack. Read more
Source§

fn end_scope(&mut self, scope: Scope)

Pops a type from the scope stack. Read more
Source§

fn nth_last_scope(&self, n: usize) -> Option<TypeId>

Gets the nth topmost scope type ID.
Source§

fn get<T>(&self, scope: TypeId) -> Option<&T>
where T: 'static,

Gets a shared reference to the storage of type T in the newest layer of the scope.
Source§

fn get_each<T>(&self) -> Box<dyn Iterator<Item = &T> + '_>
where T: 'static,

Gets a shared reference to the storage of type T in each layer, from top to bottom, if exists.
Source§

fn get_mut<T, F>(&mut self, scope: TypeId, default: F) -> &mut T
where F: FnOnce() -> T, T: 'static,

Gets a mutable reference to the storage of type T in the newest layer of the scope.
Source§

impl Default for DefaultContext

Source§

fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
Source§

impl<T> UnsafeAny for T
where T: Any,