Struct SystemTime

pub struct SystemTime { /* private fields */ }

A measurement of the system clock, useful for talking to external entities like the file system or other processes.

This corresponds to std::time::SystemTime.

This SystemTime has no now, elapsed methods. To obtain the current time or measure the duration to the current time, first obtain a SystemClock, and then call SystemClock::now or SystemClock::elapsed instead. The UNIX_EPOCH constant is at SystemClock::UNIX_EPOCH.

Similar to the filetime crate, when RUSTFLAGS=--cfg emulate_second_only_system is set, SystemTime will round times from the operating system down to the second. This emulates the behavior of some file systems, mostly HFS, allowing debugging on other hardware.

Implementations

impl SystemTime

pub fn from_std(std: SystemTime) -> SystemTime

Constructs a new instance of Self from the given std::time::SystemTime.

pub const fn into_std(self) -> SystemTime

Constructs a new instance of std::time::SystemTime from the given Self.

pub fn duration_since( &self, earlier: SystemTime, ) -> Result<Duration, SystemTimeError>

Returns the amount of time elapsed from another instant to this one.

This corresponds to std::time::SystemTime::duration_since.

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

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

This corresponds to std::time::SystemTime::checked_add.

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

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

This corresponds to std::time::SystemTime::checked_sub.

Trait Implementations

impl Add<Duration> for SystemTime

fn add(self, dur: Duration) -> SystemTime

Panics

This function may panic if the resulting point in time cannot be represented by the underlying data structure. See SystemTime::checked_add for a version without panic.

type Output = SystemTime

The resulting type after applying the + operator.

impl AddAssign<Duration> for SystemTime

fn add_assign(&mut self, other: Duration)

Performs the += operation.

impl Clone for SystemTime

fn clone(&self) -> SystemTime

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SystemTime

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

Formats the value using the given formatter.

impl Hash for SystemTime

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for SystemTime

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

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

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

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SystemTime

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for SystemTime

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Sub<Duration> for SystemTime

type Output = SystemTime

The resulting type after applying the - operator.

fn sub(self, dur: Duration) -> SystemTime

Performs the - operation.

impl SubAssign<Duration> for SystemTime

fn sub_assign(&mut self, other: Duration)

Performs the -= operation.

impl Copy for SystemTime

impl Eq for SystemTime

impl StructuralPartialEq for SystemTime