Struct gstd::prelude::time::Duration

1.3.0 · source ·
pub struct Duration { /* private fields */ }
Expand description

A Duration type to represent a span of time, typically used for system timeouts.

Each Duration is composed of a whole number of seconds and a fractional part represented in nanoseconds. If the underlying system does not support nanosecond-level precision, APIs binding a system timeout will typically round up the number of nanoseconds.

Durations implement many common traits, including Add, Sub, and other ops traits. It implements Default by returning a zero-length Duration.

§Examples

use std::time::Duration;

let five_seconds = Duration::new(5, 0);
let five_seconds_and_five_nanos = five_seconds + Duration::new(0, 5);

assert_eq!(five_seconds_and_five_nanos.as_secs(), 5);
assert_eq!(five_seconds_and_five_nanos.subsec_nanos(), 5);

let ten_millis = Duration::from_millis(10);

§Formatting Duration values

Duration intentionally does not have a Display impl, as there are a variety of ways to format spans of time for human readability. Duration provides a Debug impl that shows the full precision of the value.

The Debug output uses the non-ASCII “µs” suffix for microseconds. If your program output may appear in contexts that cannot rely on full Unicode compatibility, you may wish to format Duration objects yourself or use a crate to do so.

Implementations§

source§

impl Duration

source

pub const SECOND: Duration = _

🔬This is a nightly-only experimental API. (duration_constants)

The duration of one second.

§Examples
#![feature(duration_constants)]
use std::time::Duration;

assert_eq!(Duration::SECOND, Duration::from_secs(1));
source

pub const MILLISECOND: Duration = _

🔬This is a nightly-only experimental API. (duration_constants)

The duration of one millisecond.

§Examples
#![feature(duration_constants)]
use std::time::Duration;

assert_eq!(Duration::MILLISECOND, Duration::from_millis(1));
source

pub const MICROSECOND: Duration = _

🔬This is a nightly-only experimental API. (duration_constants)

The duration of one microsecond.

§Examples
#![feature(duration_constants)]
use std::time::Duration;

assert_eq!(Duration::MICROSECOND, Duration::from_micros(1));
source

pub const NANOSECOND: Duration = _

🔬This is a nightly-only experimental API. (duration_constants)

The duration of one nanosecond.

§Examples
#![feature(duration_constants)]
use std::time::Duration;

assert_eq!(Duration::NANOSECOND, Duration::from_nanos(1));
1.53.0 · source

pub const ZERO: Duration = _

A duration of zero time.

§Examples
use std::time::Duration;

let duration = Duration::ZERO;
assert!(duration.is_zero());
assert_eq!(duration.as_nanos(), 0);
1.53.0 · source

pub const MAX: Duration = _

The maximum duration.

May vary by platform as necessary. Must be able to contain the difference between two instances of Instant or two instances of SystemTime. This constraint gives it a value of about 584,942,417,355 years in practice, which is currently used on all platforms.

§Examples
use std::time::Duration;

assert_eq!(Duration::MAX, Duration::new(u64::MAX, 1_000_000_000 - 1));
1.3.0 (const: 1.58.0) · source

pub const fn new(secs: u64, nanos: u32) -> Duration

Creates a new Duration from the specified number of whole seconds and additional nanoseconds.

If the number of nanoseconds is greater than 1 billion (the number of nanoseconds in a second), then it will carry over into the seconds provided.

§Panics

This constructor will panic if the carry from the nanoseconds overflows the seconds counter.

§Examples
use std::time::Duration;

let five_seconds = Duration::new(5, 0);
1.3.0 (const: 1.32.0) · source

pub const fn from_secs(secs: u64) -> Duration

Creates a new Duration from the specified number of whole seconds.

§Examples
use std::time::Duration;

let duration = Duration::from_secs(5);

assert_eq!(5, duration.as_secs());
assert_eq!(0, duration.subsec_nanos());
1.3.0 (const: 1.32.0) · source

pub const fn from_millis(millis: u64) -> Duration

Creates a new Duration from the specified number of milliseconds.

§Examples
use std::time::Duration;

let duration = Duration::from_millis(2569);

assert_eq!(2, duration.as_secs());
assert_eq!(569_000_000, duration.subsec_nanos());
1.27.0 (const: 1.32.0) · source

pub const fn from_micros(micros: u64) -> Duration

Creates a new Duration from the specified number of microseconds.

§Examples
use std::time::Duration;

let duration = Duration::from_micros(1_000_002);

assert_eq!(1, duration.as_secs());
assert_eq!(2000, duration.subsec_nanos());
1.27.0 (const: 1.32.0) · source

pub const fn from_nanos(nanos: u64) -> Duration

Creates a new Duration from the specified number of nanoseconds.

Note: Using this on the return value of as_nanos() might cause unexpected behavior: as_nanos() returns a u128, and can return values that do not fit in u64, e.g. 585 years. Instead, consider using the pattern Duration::new(d.as_secs(), d.subsec_nanos()) if you cannot copy/clone the Duration directly.

§Examples
use std::time::Duration;

let duration = Duration::from_nanos(1_000_000_123);

assert_eq!(1, duration.as_secs());
assert_eq!(123, duration.subsec_nanos());
source

pub const fn from_weeks(weeks: u64) -> Duration

🔬This is a nightly-only experimental API. (duration_constructors)

Creates a new Duration from the specified number of weeks.

§Panics

Panics if the given number of weeks overflows the Duration size.

§Examples
#![feature(duration_constructors)]
use std::time::Duration;

let duration = Duration::from_weeks(4);

assert_eq!(4 * 7 * 24 * 60 * 60, duration.as_secs());
assert_eq!(0, duration.subsec_nanos());
source

pub const fn from_days(days: u64) -> Duration

🔬This is a nightly-only experimental API. (duration_constructors)

Creates a new Duration from the specified number of days.

§Panics

Panics if the given number of days overflows the Duration size.

§Examples
#![feature(duration_constructors)]
use std::time::Duration;

let duration = Duration::from_days(7);

assert_eq!(7 * 24 * 60 * 60, duration.as_secs());
assert_eq!(0, duration.subsec_nanos());
source

pub const fn from_hours(hours: u64) -> Duration

🔬This is a nightly-only experimental API. (duration_constructors)

Creates a new Duration from the specified number of hours.

§Panics

Panics if the given number of hours overflows the Duration size.

§Examples
#![feature(duration_constructors)]
use std::time::Duration;

let duration = Duration::from_hours(6);

assert_eq!(6 * 60 * 60, duration.as_secs());
assert_eq!(0, duration.subsec_nanos());
source

pub const fn from_mins(mins: u64) -> Duration

🔬This is a nightly-only experimental API. (duration_constructors)

Creates a new Duration from the specified number of minutes.

§Panics

Panics if the given number of minutes overflows the Duration size.

§Examples
#![feature(duration_constructors)]
use std::time::Duration;

let duration = Duration::from_mins(10);

assert_eq!(10 * 60, duration.as_secs());
assert_eq!(0, duration.subsec_nanos());
1.53.0 (const: 1.53.0) · source

pub const fn is_zero(&self) -> bool

Returns true if this Duration spans no time.

§Examples
use std::time::Duration;

assert!(Duration::ZERO.is_zero());
assert!(Duration::new(0, 0).is_zero());
assert!(Duration::from_nanos(0).is_zero());
assert!(Duration::from_secs(0).is_zero());

assert!(!Duration::new(1, 1).is_zero());
assert!(!Duration::from_nanos(1).is_zero());
assert!(!Duration::from_secs(1).is_zero());
1.3.0 (const: 1.32.0) · source

pub const fn as_secs(&self) -> u64

Returns the number of whole seconds contained by this Duration.

The returned value does not include the fractional (nanosecond) part of the duration, which can be obtained using subsec_nanos.

§Examples
use std::time::Duration;

let duration = Duration::new(5, 730023852);
assert_eq!(duration.as_secs(), 5);

To determine the total number of seconds represented by the Duration including the fractional part, use as_secs_f64 or as_secs_f32

1.27.0 (const: 1.32.0) · source

pub const fn subsec_millis(&self) -> u32

Returns the fractional part of this Duration, in whole milliseconds.

This method does not return the length of the duration when represented by milliseconds. The returned number always represents a fractional portion of a second (i.e., it is less than one thousand).

§Examples
use std::time::Duration;

let duration = Duration::from_millis(5432);
assert_eq!(duration.as_secs(), 5);
assert_eq!(duration.subsec_millis(), 432);
1.27.0 (const: 1.32.0) · source

pub const fn subsec_micros(&self) -> u32

Returns the fractional part of this Duration, in whole microseconds.

This method does not return the length of the duration when represented by microseconds. The returned number always represents a fractional portion of a second (i.e., it is less than one million).

§Examples
use std::time::Duration;

let duration = Duration::from_micros(1_234_567);
assert_eq!(duration.as_secs(), 1);
assert_eq!(duration.subsec_micros(), 234_567);
1.3.0 (const: 1.32.0) · source

pub const fn subsec_nanos(&self) -> u32

Returns the fractional part of this Duration, in nanoseconds.

This method does not return the length of the duration when represented by nanoseconds. The returned number always represents a fractional portion of a second (i.e., it is less than one billion).

§Examples
use std::time::Duration;

let duration = Duration::from_millis(5010);
assert_eq!(duration.as_secs(), 5);
assert_eq!(duration.subsec_nanos(), 10_000_000);
1.33.0 (const: 1.33.0) · source

pub const fn as_millis(&self) -> u128

Returns the total number of whole milliseconds contained by this Duration.

§Examples
use std::time::Duration;

let duration = Duration::new(5, 730023852);
assert_eq!(duration.as_millis(), 5730);
1.33.0 (const: 1.33.0) · source

pub const fn as_micros(&self) -> u128

Returns the total number of whole microseconds contained by this Duration.

§Examples
use std::time::Duration;

let duration = Duration::new(5, 730023852);
assert_eq!(duration.as_micros(), 5730023);
1.33.0 (const: 1.33.0) · source

pub const fn as_nanos(&self) -> u128

Returns the total number of nanoseconds contained by this Duration.

§Examples
use std::time::Duration;

let duration = Duration::new(5, 730023852);
assert_eq!(duration.as_nanos(), 5730023852);
1.82.0 (const: 1.82.0) · source

pub const fn abs_diff(self, other: Duration) -> Duration

Computes the absolute difference between self and other.

§Examples

Basic usage:

use std::time::Duration;

assert_eq!(Duration::new(100, 0).abs_diff(Duration::new(80, 0)), Duration::new(20, 0));
assert_eq!(Duration::new(100, 400_000_000).abs_diff(Duration::new(110, 0)), Duration::new(9, 600_000_000));
1.16.0 (const: 1.58.0) · source

pub const fn checked_add(self, rhs: Duration) -> Option<Duration>

Checked Duration addition. Computes self + other, returning None if overflow occurred.

§Examples

Basic usage:

use std::time::Duration;

assert_eq!(Duration::new(0, 0).checked_add(Duration::new(0, 1)), Some(Duration::new(0, 1)));
assert_eq!(Duration::new(1, 0).checked_add(Duration::new(u64::MAX, 0)), None);
1.53.0 (const: 1.58.0) · source

pub const fn saturating_add(self, rhs: Duration) -> Duration

Saturating Duration addition. Computes self + other, returning Duration::MAX if overflow occurred.

§Examples
#![feature(duration_constants)]
use std::time::Duration;

assert_eq!(Duration::new(0, 0).saturating_add(Duration::new(0, 1)), Duration::new(0, 1));
assert_eq!(Duration::new(1, 0).saturating_add(Duration::new(u64::MAX, 0)), Duration::MAX);
1.16.0 (const: 1.58.0) · source

pub const fn checked_sub(self, rhs: Duration) -> Option<Duration>

Checked Duration subtraction. Computes self - other, returning None if the result would be negative or if overflow occurred.

§Examples

Basic usage:

use std::time::Duration;

assert_eq!(Duration::new(0, 1).checked_sub(Duration::new(0, 0)), Some(Duration::new(0, 1)));
assert_eq!(Duration::new(0, 0).checked_sub(Duration::new(0, 1)), None);
1.53.0 (const: 1.58.0) · source

pub const fn saturating_sub(self, rhs: Duration) -> Duration

Saturating Duration subtraction. Computes self - other, returning Duration::ZERO if the result would be negative or if overflow occurred.

§Examples
use std::time::Duration;

assert_eq!(Duration::new(0, 1).saturating_sub(Duration::new(0, 0)), Duration::new(0, 1));
assert_eq!(Duration::new(0, 0).saturating_sub(Duration::new(0, 1)), Duration::ZERO);
1.16.0 (const: 1.58.0) · source

pub const fn checked_mul(self, rhs: u32) -> Option<Duration>

Checked Duration multiplication. Computes self * other, returning None if overflow occurred.

§Examples

Basic usage:

use std::time::Duration;

assert_eq!(Duration::new(0, 500_000_001).checked_mul(2), Some(Duration::new(1, 2)));
assert_eq!(Duration::new(u64::MAX - 1, 0).checked_mul(2), None);
1.53.0 (const: 1.58.0) · source

pub const fn saturating_mul(self, rhs: u32) -> Duration

Saturating Duration multiplication. Computes self * other, returning Duration::MAX if overflow occurred.

§Examples
#![feature(duration_constants)]
use std::time::Duration;

assert_eq!(Duration::new(0, 500_000_001).saturating_mul(2), Duration::new(1, 2));
assert_eq!(Duration::new(u64::MAX - 1, 0).saturating_mul(2), Duration::MAX);
1.16.0 (const: 1.58.0) · source

pub const fn checked_div(self, rhs: u32) -> Option<Duration>

Checked Duration division. Computes self / other, returning None if other == 0.

§Examples

Basic usage:

use std::time::Duration;

assert_eq!(Duration::new(2, 0).checked_div(2), Some(Duration::new(1, 0)));
assert_eq!(Duration::new(1, 0).checked_div(2), Some(Duration::new(0, 500_000_000)));
assert_eq!(Duration::new(2, 0).checked_div(0), None);
1.38.0 (const: unstable) · source

pub fn as_secs_f64(&self) -> f64

Returns the number of seconds contained by this Duration as f64.

The returned value includes the fractional (nanosecond) part of the duration.

§Examples
use std::time::Duration;

let dur = Duration::new(2, 700_000_000);
assert_eq!(dur.as_secs_f64(), 2.7);
1.38.0 (const: unstable) · source

pub fn as_secs_f32(&self) -> f32

Returns the number of seconds contained by this Duration as f32.

The returned value includes the fractional (nanosecond) part of the duration.

§Examples
use std::time::Duration;

let dur = Duration::new(2, 700_000_000);
assert_eq!(dur.as_secs_f32(), 2.7);
source

pub const fn as_millis_f64(&self) -> f64

🔬This is a nightly-only experimental API. (duration_millis_float)

Returns the number of milliseconds contained by this Duration as f64.

The returned value includes the fractional (nanosecond) part of the duration.

§Examples
#![feature(duration_millis_float)]
use std::time::Duration;

let dur = Duration::new(2, 345_678_000);
assert_eq!(dur.as_millis_f64(), 2345.678);
source

pub const fn as_millis_f32(&self) -> f32

🔬This is a nightly-only experimental API. (duration_millis_float)

Returns the number of milliseconds contained by this Duration as f32.

The returned value includes the fractional (nanosecond) part of the duration.

§Examples
#![feature(duration_millis_float)]
use std::time::Duration;

let dur = Duration::new(2, 345_678_000);
assert_eq!(dur.as_millis_f32(), 2345.678);
1.38.0 · source

pub fn from_secs_f64(secs: f64) -> Duration

Creates a new Duration from the specified number of seconds represented as f64.

§Panics

This constructor will panic if secs is negative, overflows Duration or not finite.

§Examples
use std::time::Duration;

let res = Duration::from_secs_f64(0.0);
assert_eq!(res, Duration::new(0, 0));
let res = Duration::from_secs_f64(1e-20);
assert_eq!(res, Duration::new(0, 0));
let res = Duration::from_secs_f64(4.2e-7);
assert_eq!(res, Duration::new(0, 420));
let res = Duration::from_secs_f64(2.7);
assert_eq!(res, Duration::new(2, 700_000_000));
let res = Duration::from_secs_f64(3e10);
assert_eq!(res, Duration::new(30_000_000_000, 0));
// subnormal float
let res = Duration::from_secs_f64(f64::from_bits(1));
assert_eq!(res, Duration::new(0, 0));
// conversion uses rounding
let res = Duration::from_secs_f64(0.999e-9);
assert_eq!(res, Duration::new(0, 1));
1.38.0 · source

pub fn from_secs_f32(secs: f32) -> Duration

Creates a new Duration from the specified number of seconds represented as f32.

§Panics

This constructor will panic if secs is negative, overflows Duration or not finite.

§Examples
use std::time::Duration;

let res = Duration::from_secs_f32(0.0);
assert_eq!(res, Duration::new(0, 0));
let res = Duration::from_secs_f32(1e-20);
assert_eq!(res, Duration::new(0, 0));
let res = Duration::from_secs_f32(4.2e-7);
assert_eq!(res, Duration::new(0, 420));
let res = Duration::from_secs_f32(2.7);
assert_eq!(res, Duration::new(2, 700_000_048));
let res = Duration::from_secs_f32(3e10);
assert_eq!(res, Duration::new(30_000_001_024, 0));
// subnormal float
let res = Duration::from_secs_f32(f32::from_bits(1));
assert_eq!(res, Duration::new(0, 0));
// conversion uses rounding
let res = Duration::from_secs_f32(0.999e-9);
assert_eq!(res, Duration::new(0, 1));
1.38.0 · source

pub fn mul_f64(self, rhs: f64) -> Duration

Multiplies Duration by f64.

§Panics

This method will panic if result is negative, overflows Duration or not finite.

§Examples
use std::time::Duration;

let dur = Duration::new(2, 700_000_000);
assert_eq!(dur.mul_f64(3.14), Duration::new(8, 478_000_000));
assert_eq!(dur.mul_f64(3.14e5), Duration::new(847_800, 0));
1.38.0 · source

pub fn mul_f32(self, rhs: f32) -> Duration

Multiplies Duration by f32.

§Panics

This method will panic if result is negative, overflows Duration or not finite.

§Examples
use std::time::Duration;

let dur = Duration::new(2, 700_000_000);
assert_eq!(dur.mul_f32(3.14), Duration::new(8, 478_000_641));
assert_eq!(dur.mul_f32(3.14e5), Duration::new(847800, 0));
1.38.0 · source

pub fn div_f64(self, rhs: f64) -> Duration

Divides Duration by f64.

§Panics

This method will panic if result is negative, overflows Duration or not finite.

§Examples
use std::time::Duration;

let dur = Duration::new(2, 700_000_000);
assert_eq!(dur.div_f64(3.14), Duration::new(0, 859_872_611));
assert_eq!(dur.div_f64(3.14e5), Duration::new(0, 8_599));
1.38.0 · source

pub fn div_f32(self, rhs: f32) -> Duration

Divides Duration by f32.

§Panics

This method will panic if result is negative, overflows Duration or not finite.

§Examples
use std::time::Duration;

let dur = Duration::new(2, 700_000_000);
// note that due to rounding errors result is slightly
// different from 0.859_872_611
assert_eq!(dur.div_f32(3.14), Duration::new(0, 859_872_580));
assert_eq!(dur.div_f32(3.14e5), Duration::new(0, 8_599));
1.80.0 (const: unstable) · source

pub fn div_duration_f64(self, rhs: Duration) -> f64

Divides Duration by Duration and returns f64.

§Examples
use std::time::Duration;

let dur1 = Duration::new(2, 700_000_000);
let dur2 = Duration::new(5, 400_000_000);
assert_eq!(dur1.div_duration_f64(dur2), 0.5);
1.80.0 (const: unstable) · source

pub fn div_duration_f32(self, rhs: Duration) -> f32

Divides Duration by Duration and returns f32.

§Examples
use std::time::Duration;

let dur1 = Duration::new(2, 700_000_000);
let dur2 = Duration::new(5, 400_000_000);
assert_eq!(dur1.div_duration_f32(dur2), 0.5);
source§

impl Duration

1.66.0 · source

pub fn try_from_secs_f32(secs: f32) -> Result<Duration, TryFromFloatSecsError>

The checked version of from_secs_f32.

This constructor will return an Err if secs is negative, overflows Duration or not finite.

§Examples
use std::time::Duration;

let res = Duration::try_from_secs_f32(0.0);
assert_eq!(res, Ok(Duration::new(0, 0)));
let res = Duration::try_from_secs_f32(1e-20);
assert_eq!(res, Ok(Duration::new(0, 0)));
let res = Duration::try_from_secs_f32(4.2e-7);
assert_eq!(res, Ok(Duration::new(0, 420)));
let res = Duration::try_from_secs_f32(2.7);
assert_eq!(res, Ok(Duration::new(2, 700_000_048)));
let res = Duration::try_from_secs_f32(3e10);
assert_eq!(res, Ok(Duration::new(30_000_001_024, 0)));
// subnormal float:
let res = Duration::try_from_secs_f32(f32::from_bits(1));
assert_eq!(res, Ok(Duration::new(0, 0)));

let res = Duration::try_from_secs_f32(-5.0);
assert!(res.is_err());
let res = Duration::try_from_secs_f32(f32::NAN);
assert!(res.is_err());
let res = Duration::try_from_secs_f32(2e19);
assert!(res.is_err());

// the conversion uses rounding with tie resolution to even
let res = Duration::try_from_secs_f32(0.999e-9);
assert_eq!(res, Ok(Duration::new(0, 1)));

// this float represents exactly 976562.5e-9
let val = f32::from_bits(0x3A80_0000);
let res = Duration::try_from_secs_f32(val);
assert_eq!(res, Ok(Duration::new(0, 976_562)));

// this float represents exactly 2929687.5e-9
let val = f32::from_bits(0x3B40_0000);
let res = Duration::try_from_secs_f32(val);
assert_eq!(res, Ok(Duration::new(0, 2_929_688)));

// this float represents exactly 1.000_976_562_5
let val = f32::from_bits(0x3F802000);
let res = Duration::try_from_secs_f32(val);
assert_eq!(res, Ok(Duration::new(1, 976_562)));

// this float represents exactly 1.002_929_687_5
let val = f32::from_bits(0x3F806000);
let res = Duration::try_from_secs_f32(val);
assert_eq!(res, Ok(Duration::new(1, 2_929_688)));
1.66.0 · source

pub fn try_from_secs_f64(secs: f64) -> Result<Duration, TryFromFloatSecsError>

The checked version of from_secs_f64.

This constructor will return an Err if secs is negative, overflows Duration or not finite.

§Examples
use std::time::Duration;

let res = Duration::try_from_secs_f64(0.0);
assert_eq!(res, Ok(Duration::new(0, 0)));
let res = Duration::try_from_secs_f64(1e-20);
assert_eq!(res, Ok(Duration::new(0, 0)));
let res = Duration::try_from_secs_f64(4.2e-7);
assert_eq!(res, Ok(Duration::new(0, 420)));
let res = Duration::try_from_secs_f64(2.7);
assert_eq!(res, Ok(Duration::new(2, 700_000_000)));
let res = Duration::try_from_secs_f64(3e10);
assert_eq!(res, Ok(Duration::new(30_000_000_000, 0)));
// subnormal float
let res = Duration::try_from_secs_f64(f64::from_bits(1));
assert_eq!(res, Ok(Duration::new(0, 0)));

let res = Duration::try_from_secs_f64(-5.0);
assert!(res.is_err());
let res = Duration::try_from_secs_f64(f64::NAN);
assert!(res.is_err());
let res = Duration::try_from_secs_f64(2e19);
assert!(res.is_err());

// the conversion uses rounding with tie resolution to even
let res = Duration::try_from_secs_f64(0.999e-9);
assert_eq!(res, Ok(Duration::new(0, 1)));
let res = Duration::try_from_secs_f64(0.999_999_999_499);
assert_eq!(res, Ok(Duration::new(0, 999_999_999)));
let res = Duration::try_from_secs_f64(0.999_999_999_501);
assert_eq!(res, Ok(Duration::new(1, 0)));
let res = Duration::try_from_secs_f64(42.999_999_999_499);
assert_eq!(res, Ok(Duration::new(42, 999_999_999)));
let res = Duration::try_from_secs_f64(42.999_999_999_501);
assert_eq!(res, Ok(Duration::new(43, 0)));

// this float represents exactly 976562.5e-9
let val = f64::from_bits(0x3F50_0000_0000_0000);
let res = Duration::try_from_secs_f64(val);
assert_eq!(res, Ok(Duration::new(0, 976_562)));

// this float represents exactly 2929687.5e-9
let val = f64::from_bits(0x3F68_0000_0000_0000);
let res = Duration::try_from_secs_f64(val);
assert_eq!(res, Ok(Duration::new(0, 2_929_688)));

// this float represents exactly 1.000_976_562_5
let val = f64::from_bits(0x3FF0_0400_0000_0000);
let res = Duration::try_from_secs_f64(val);
assert_eq!(res, Ok(Duration::new(1, 976_562)));

// this float represents exactly 1.002_929_687_5
let val = f64::from_bits(0x3_FF00_C000_0000_000);
let res = Duration::try_from_secs_f64(val);
assert_eq!(res, Ok(Duration::new(1, 2_929_688)));

Trait Implementations§

1.3.0 · source§

impl Add for Duration

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type Output = Duration

The resulting type after applying the + operator.
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fn add(self, rhs: Duration) -> Duration

Performs the + operation. Read more
1.9.0 · source§

impl AddAssign for Duration

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fn add_assign(&mut self, rhs: Duration)

Performs the += operation. Read more
1.3.0 · source§

impl Clone for Duration

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fn clone(&self) -> Duration

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
1.27.0 · source§

impl Debug for Duration

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

Formats the value using the given formatter. Read more
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impl Decode for Duration

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fn decode<I>(input: &mut I) -> Result<Duration, Error>
where I: Input,

Attempt to deserialise the value from input.
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fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>
where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory. Read more
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fn skip<I>(input: &mut I) -> Result<(), Error>
where I: Input,

Attempt to skip the encoded value from input. Read more
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fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more
1.3.0 · source§

impl Default for Duration

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fn default() -> Duration

Returns the “default value” for a type. Read more
1.3.0 · source§

impl Div<u32> for Duration

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type Output = Duration

The resulting type after applying the / operator.
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fn div(self, rhs: u32) -> Duration

Performs the / operation. Read more
1.9.0 · source§

impl DivAssign<u32> for Duration

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fn div_assign(&mut self, rhs: u32)

Performs the /= operation. Read more
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impl Encode for Duration

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fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more
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fn encode(&self) -> Vec<u8>

Convert self to an owned vector.
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fn encode_to<T>(&self, dest: &mut T)
where T: Output + ?Sized,

Convert self to a slice and append it to the destination.
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fn using_encoded<R, F>(&self, f: F) -> R
where F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.
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fn encoded_size(&self) -> usize

Calculates the encoded size. Read more
1.3.0 · source§

impl Hash for Duration

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

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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

Feeds a slice of this type into the given Hasher. Read more
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impl MaxEncodedLen for Duration

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fn max_encoded_len() -> usize

Upper bound, in bytes, of the maximum encoded size of this item.
1.31.0 · source§

impl Mul<Duration> for u32

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type Output = Duration

The resulting type after applying the * operator.
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fn mul(self, rhs: Duration) -> Duration

Performs the * operation. Read more
1.3.0 · source§

impl Mul<u32> for Duration

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type Output = Duration

The resulting type after applying the * operator.
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fn mul(self, rhs: u32) -> Duration

Performs the * operation. Read more
1.9.0 · source§

impl MulAssign<u32> for Duration

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fn mul_assign(&mut self, rhs: u32)

Performs the *= operation. Read more
1.3.0 · source§

impl Ord for Duration

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

This method returns an Ordering between self and other. Read more
1.21.0 · source§

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

Compares and returns the maximum of two values. Read more
1.21.0 · source§

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

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
1.3.0 · source§

impl PartialEq for Duration

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

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

impl PartialOrd for Duration

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

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

Tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

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

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.3.0 · source§

impl Sub for Duration

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type Output = Duration

The resulting type after applying the - operator.
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fn sub(self, rhs: Duration) -> Duration

Performs the - operation. Read more
1.9.0 · source§

impl SubAssign for Duration

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fn sub_assign(&mut self, rhs: Duration)

Performs the -= operation. Read more
1.16.0 · source§

impl<'a> Sum<&'a Duration> for Duration

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fn sum<I>(iter: I) -> Duration
where I: Iterator<Item = &'a Duration>,

Takes an iterator and generates Self from the elements by “summing up” the items.
1.16.0 · source§

impl Sum for Duration

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fn sum<I>(iter: I) -> Duration
where I: Iterator<Item = Duration>,

Takes an iterator and generates Self from the elements by “summing up” the items.
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impl TypeInfo for Duration

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type Identity = Duration

The type identifying for which type info is provided. Read more
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fn type_info() -> Type

Returns the static type identifier for Self.
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impl ConstEncodedLen for Duration

1.3.0 · source§

impl Copy for Duration

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impl EncodeLike for Duration

1.3.0 · source§

impl Eq for Duration

1.3.0 · source§

impl StructuralPartialEq for Duration

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> DecodeAll for T
where T: Decode,

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fn decode_all(input: &mut &[u8]) -> Result<T, Error>

Decode Self and consume all of the given input data. Read more
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impl<T> DecodeLimit for T
where T: Decode,

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fn decode_all_with_depth_limit( limit: u32, input: &mut &[u8], ) -> Result<T, Error>

Decode Self and consume all of the given input data. Read more
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fn decode_with_depth_limit<I>(limit: u32, input: &mut I) -> Result<T, Error>
where I: Input,

Decode Self with the given maximum recursion depth and advance input by the number of bytes consumed. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> KeyedVec for T
where T: Codec,

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fn to_keyed_vec(&self, prepend_key: &[u8]) -> Vec<u8>

Return an encoding of Self prepended by given slice.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<S> Codec for S
where S: Decode + Encode,

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impl<T> EncodeLike<&&T> for T
where T: Encode,

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impl<T> EncodeLike<&T> for T
where T: Encode,

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impl<T> EncodeLike<&mut T> for T
where T: Encode,

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impl<T> EncodeLike<Arc<T>> for T
where T: Encode,

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impl<T> EncodeLike<Box<T>> for T
where T: Encode,

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impl<'a, T> EncodeLike<Cow<'a, T>> for T
where T: ToOwned + Encode,

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impl<T> EncodeLike<Rc<T>> for T
where T: Encode,

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impl<S> FullCodec for S
where S: Decode + FullEncode,

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impl<S> FullEncode for S
where S: Encode + EncodeLike,

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impl<T> JsonSchemaMaybe for T

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impl<T> StaticTypeInfo for T
where T: TypeInfo + 'static,