Struct actix_web::http::header::Quality

pub struct Quality(_);

Represents a quality used in quality values.

Can be created with the q function.

Implementation notes

The quality value is defined as a number between 0 and 1 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, hyper uses an u16 value to store the quality internally. For performance reasons you may set quality directly to a value between 0 and 1000 e.g. Quality(532) matches the quality q=0.532.

RFC7231 Section 5.3.1 gives more information on quality values in HTTP header fields.

Trait Implementations

impl Clone for Quality

pub fn clone(&self) -> Quality

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Quality

impl Debug for Quality

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

Formats the value using the given formatter.

impl Default for Quality

pub fn default() -> Quality

Returns the "default value" for a type.

impl Eq for Quality

impl Ord for Quality

pub fn cmp(&self, other: &Quality) -> Ordering

This method returns an Ordering between self and other.

#[must_use]pub fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]pub fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<Quality> for Quality

pub fn eq(&self, other: &Quality) -> bool

This method tests for self and other values to be equal, and is used by ==.

pub fn ne(&self, other: &Quality) -> bool

This method tests for !=.

impl PartialOrd<Quality> for Quality

pub fn partial_cmp(&self, other: &Quality) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

pub fn lt(&self, other: &Quality) -> bool

This method tests less than (for self and other) and is used by the < operator.

pub fn le(&self, other: &Quality) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

pub fn gt(&self, other: &Quality) -> bool

This method tests greater than (for self and other) and is used by the > operator.

pub fn ge(&self, other: &Quality) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralEq for Quality

impl StructuralPartialEq for Quality

impl TryFrom<f32> for Quality

type Error = QualityOutOfBounds

The type returned in the event of a conversion error.

pub fn try_from(value: f32) -> Result<Quality, <Quality as TryFrom<f32>>::Error>

Performs the conversion.

impl TryFrom<u16> for Quality

type Error = QualityOutOfBounds

The type returned in the event of a conversion error.

pub fn try_from(value: u16) -> Result<Quality, <Quality as TryFrom<u16>>::Error>

Performs the conversion.