Struct Context 

pub struct Context { /* private fields */ }

Implementations

impl Context

pub fn deadline(&self) -> Option<Instant>

pub fn done(&self) -> DoneHandle

pub fn done_async(&self) -> DoneFuture

异步版 Done：返回一个 Future，在 Context 完成时立即 ready；Never 时永 pending。

pub fn err(&self) -> Option<ContextError>

pub fn cause(&self) -> Option<Arc<dyn Error + Send + Sync>>

pub fn value(&self, key: &dyn ValueKey) -> Option<Arc<dyn Any + Send + Sync>>

Trait Implementations

impl Clone for Context

fn clone(&self) -> Self

Returns a duplicate 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 Drop for Context

fn drop(&mut self)

Executes the destructor for this type.