Struct Context

pub struct Context { /* private fields */ }

Pipeline execution context.

Implementations

impl Context

pub fn new() -> Self

Creates a new, empty Context.

pub fn insert_or_replace<E>(&mut self, entity: E) -> Option<Arc<E>>

where E: Send + Sync + 'static,

Inserts or replaces an entity in the type map. If an entity with the same type was displaced by the insert, it will be returned to the caller.

pub fn insert<E>(&mut self, entity: E) -> &mut Self

where E: Send + Sync + 'static,

Inserts an entity in the type map. If the an entity with the same type signature is already present it will be silently dropped. This function returns a mutable reference to the same Context so it can be chained to itself.

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

where E: Send + Sync + 'static,

Removes an entity from the type map. If present, the entity will be returned.

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

where E: Send + Sync + 'static,

Returns a reference of the entity of the specified type signature, if it exists.

If there is no entity with the specific type signature, None is returned instead.

pub fn len(&self) -> usize

Returns the number of entities in the type map.

pub fn is_empty(&self) -> bool

Returns true if the type map is empty, false otherwise.

Trait Implementations

impl Clone for Context

fn clone(&self) -> Context

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Context

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

Formats the value using the given formatter.

impl Default for Context

fn default() -> Self

Returns the “default value” for a type.