Struct actix_web::cookie::time::Instant

#[repr(transparent)]
pub struct Instant(pub Instant);

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A measurement of a monotonically non-decreasing clock. Opaque and useful only with Duration.

Instants are always guaranteed to be no less than any previously measured instant when created, and are often useful for tasks such as measuring benchmarks or timing how long an operation takes.

Note, however, that instants are not guaranteed to be steady. In other words, each tick of the underlying clock may not be the same length (e.g. some seconds may be longer than others). An instant may jump forwards or experience time dilation (slow down or speed up), but it will never go backwards.

Instants are opaque types that can only be compared to one another. There is no method to get “the number of seconds” from an instant. Instead, it only allows measuring the duration between two instants (or comparing two instants).

This implementation allows for operations with signed Durations, but is otherwise identical to std::time::Instant.

Tuple Fields

0: Instant

Implementations

impl Instant

pub fn now() -> Instant

Returns an Instant corresponding to “now”.

println!("{:?}", Instant::now());

pub fn elapsed(self) -> Duration

Returns the amount of time elapsed since this instant was created. The duration will always be nonnegative if the instant is not synthetically created.

let instant = Instant::now();
thread::sleep(1.std_milliseconds());
assert!(instant.elapsed() >= 1.milliseconds());

pub fn checked_add(self, duration: Duration) -> Option<Instant>

Returns Some(t) where t is the time self + duration if t can be represented as Instant (which means it’s inside the bounds of the underlying data structure), None otherwise.

let now = Instant::now();
assert_eq!(now.checked_add(5.seconds()), Some(now + 5.seconds()));
assert_eq!(now.checked_add((-5).seconds()), Some(now + (-5).seconds()));

pub fn checked_sub(self, duration: Duration) -> Option<Instant>

Returns Some(t) where t is the time self - duration if t can be represented as Instant (which means it’s inside the bounds of the underlying data structure), None otherwise.

let now = Instant::now();
assert_eq!(now.checked_sub(5.seconds()), Some(now - 5.seconds()));
assert_eq!(now.checked_sub((-5).seconds()), Some(now - (-5).seconds()));

pub const fn into_inner(self) -> Instant

Obtain the inner std::time::Instant.

let now = Instant::now();
assert_eq!(now.into_inner(), now.0);

Trait Implementations

impl Add<Duration> for Instant

type Output = Instant

The resulting type after applying the + operator.

pub fn add(self, duration: Duration) -> <Instant as Add<Duration>>::Output

Performs the + operation.

impl Add<Duration> for Instant

type Output = Instant

The resulting type after applying the + operator.

pub fn add(self, duration: Duration) -> <Instant as Add<Duration>>::Output

Performs the + operation.

impl AddAssign<Duration> for Instant

pub fn add_assign(&mut self, rhs: Duration)

Performs the += operation.

impl AddAssign<Duration> for Instant

pub fn add_assign(&mut self, rhs: Duration)

Performs the += operation.

impl AsRef<Instant> for Instant

pub fn as_ref(&self) -> &Instant

Performs the conversion.

impl Borrow<Instant> for Instant

pub fn borrow(&self) -> &Instant

Immutably borrows from an owned value.

impl Clone for Instant

pub fn clone(&self) -> Instant

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Instant

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

Formats the value using the given formatter.

impl From<Instant> for Instant

pub fn from(instant: Instant) -> Instant

Performs the conversion.

impl Hash for Instant

pub fn hash<__H>(&self, state: &mut __H) where
    __H: Hasher, 

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl Ord for Instant

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

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<Instant> for Instant

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

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

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

This method tests for !=.

impl PartialEq<Instant> for Instant

pub fn eq(&self, rhs: &Instant) -> bool

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

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

This method tests for !=.

impl PartialOrd<Instant> for Instant

pub fn partial_cmp(&self, rhs: &Instant) -> Option<Ordering>

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

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

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

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

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

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

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

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

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

impl PartialOrd<Instant> for Instant

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

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

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

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

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

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

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

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

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

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

impl Sub<Duration> for Instant

type Output = Instant

The resulting type after applying the - operator.

pub fn sub(self, duration: Duration) -> <Instant as Sub<Duration>>::Output

Performs the - operation.

impl Sub<Duration> for Instant

type Output = Instant

The resulting type after applying the - operator.

pub fn sub(self, duration: Duration) -> <Instant as Sub<Duration>>::Output

Performs the - operation.

impl Sub<Instant> for Instant

type Output = Duration

The resulting type after applying the - operator.

pub fn sub(self, other: Instant) -> <Instant as Sub<Instant>>::Output

Performs the - operation.

impl Sub<Instant> for Instant

type Output = Duration

The resulting type after applying the - operator.

pub fn sub(self, other: Instant) -> <Instant as Sub<Instant>>::Output

Performs the - operation.

impl SubAssign<Duration> for Instant

pub fn sub_assign(&mut self, rhs: Duration)

Performs the -= operation.

impl SubAssign<Duration> for Instant

pub fn sub_assign(&mut self, rhs: Duration)

Performs the -= operation.

impl Copy for Instant

impl Eq for Instant

impl StructuralEq for Instant

impl StructuralPartialEq for Instant