pub struct SizeHint { /* private fields */ }
Expand description
A Body
size hint
The default implementation returns:
- 0 for
lower
None
forupper
.
Implementations
sourceimpl SizeHint
impl SizeHint
sourcepub fn with_exact(value: u64) -> SizeHint
pub fn with_exact(value: u64) -> SizeHint
Returns a new SizeHint
with both upper and lower bounds set to the
given value.
sourcepub fn lower(&self) -> u64
pub fn lower(&self) -> u64
Returns the lower bound of data that the Body
will yield before
completing.
sourcepub fn upper(&self) -> Option<u64>
pub fn upper(&self) -> Option<u64>
Returns the upper bound of data the Body
will yield before
completing, or None
if the value is unknown.
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for SizeHint
impl Send for SizeHint
impl Sync for SizeHint
impl Unpin for SizeHint
impl UnwindSafe for SizeHint
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcepub fn borrow_mut(&mut self) -> &mut T
pub fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
sourcefn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcepub fn to_owned(&self) -> T
pub fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
sourcepub fn clone_into(&self, target: &mut T)
pub fn clone_into(&self, target: &mut T)
🔬 This is a nightly-only experimental API. (
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more