pub struct Quality(_);
Expand description
Represents a quality used in q-factor values.
The default value is equivalent to q=1.0
(the max value).
Implementation notes
The quality value is defined as a number between 0.0 and 1.0 with three decimal places.
This means there are 1001 possible values. Since floating point numbers are not exact and the
smallest floating point data type (f32
) consumes four bytes, we use an u16
value to store
the quality internally.
RFC 7231 §5.3.1 gives more information on quality values in HTTP header fields.
Examples
use actix_http::header::{Quality, q};
assert_eq!(q(1.0), Quality::MAX);
assert_eq!(q(0.42).to_string(), "0.42");
assert_eq!(q(1.0).to_string(), "1");
assert_eq!(Quality::MIN.to_string(), "0.001");
assert_eq!(Quality::ZERO.to_string(), "0");
Implementations
Trait Implementations
sourceimpl Default for Quality
impl Default for Quality
The default value is Quality::MAX
.
sourceimpl Ord for Quality
impl Ord for Quality
sourceimpl PartialOrd<Quality> for Quality
impl PartialOrd<Quality> for Quality
sourcepub fn partial_cmp(&self, other: &Quality) -> Option<Ordering>
pub fn partial_cmp(&self, other: &Quality) -> Option<Ordering>
This method returns an ordering between self
and other
values if one exists. Read more
1.0.0 · sourcefn lt(&self, other: &Rhs) -> bool
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self
and other
) and is used by the <
operator. Read more
1.0.0 · sourcefn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
impl Copy for Quality
impl Eq for Quality
impl StructuralEq for Quality
impl StructuralPartialEq for Quality
Auto Trait Implementations
impl RefUnwindSafe for Quality
impl Send for Quality
impl Sync for Quality
impl Unpin for Quality
impl UnwindSafe for Quality
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<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
sourcepub fn equivalent(&self, key: &K) -> bool
pub fn equivalent(&self, key: &K) -> bool
Compare self to key
and return true
if they are equal.
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)
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
pub fn vzip(self) -> V
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