Struct time::Time

pub struct Time { /* fields omitted */ }

The clock time within a given date. Nanosecond precision.

All minutes are assumed to have exactly 60 seconds; no attempt is made to handle leap seconds (either positive or negative).

When comparing two Times, they are assumed to be in the same calendar date.

Methods

impl Time

pub const fn midnight() -> Self

Create a Time that is exactly midnight.

assert_eq!(Time::midnight(), Time::try_from_hms(0, 0, 0).unwrap());

pub fn try_from_hms(
    hour: u8,
    minute: u8,
    second: u8
) -> Result<Self, ComponentRangeError>

Attempt to create a Time from the hour, minute, and second.

assert!(Time::try_from_hms(1, 2, 3).is_ok());

Returns None if any component is not valid.

assert!(Time::try_from_hms(24, 0, 0).is_err()); // 24 isn't a valid hour.
assert!(Time::try_from_hms(0, 60, 0).is_err()); // 60 isn't a valid minute.
assert!(Time::try_from_hms(0, 0, 60).is_err()); // 60 isn't a valid second.

pub fn try_from_hms_milli(
    hour: u8,
    minute: u8,
    second: u8,
    millisecond: u16
) -> Result<Self, ComponentRangeError>

Attempt to create a Time from the hour, minute, second, and millisecond.

assert!(Time::try_from_hms_milli(1, 2, 3, 4).is_ok());

Returns None if any component is not valid.

assert!(Time::try_from_hms_milli(24, 0, 0, 0).is_err()); // 24 isn't a valid hour.
assert!(Time::try_from_hms_milli(0, 60, 0, 0).is_err()); // 60 isn't a valid minute.
assert!(Time::try_from_hms_milli(0, 0, 60, 0).is_err()); // 60 isn't a valid second.
assert!(Time::try_from_hms_milli(0, 0, 0, 1_000).is_err()); // 1_000 isn't a valid millisecond.

pub fn try_from_hms_micro(
    hour: u8,
    minute: u8,
    second: u8,
    microsecond: u32
) -> Result<Self, ComponentRangeError>

Attempt to create a Time from the hour, minute, second, and microsecond.

assert!(Time::try_from_hms_micro(1, 2, 3, 4).is_ok());

Returns None if any component is not valid.

assert!(Time::try_from_hms_micro(24, 0, 0, 0).is_err()); // 24 isn't a valid hour.
assert!(Time::try_from_hms_micro(0, 60, 0, 0).is_err()); // 60 isn't a valid minute.
assert!(Time::try_from_hms_micro(0, 0, 60, 0).is_err()); // 60 isn't a valid second.
assert!(Time::try_from_hms_micro(0, 0, 0, 1_000_000).is_err()); // 1_000_000 isn't a valid microsecond.

pub fn try_from_hms_nano(
    hour: u8,
    minute: u8,
    second: u8,
    nanosecond: u32
) -> Result<Self, ComponentRangeError>

Attempt to create a Time from the hour, minute, second, and nanosecond.

assert!(Time::try_from_hms_nano(1, 2, 3, 4).is_ok());

Returns None if any component is not valid.

assert!(Time::try_from_hms_nano(24, 0, 0, 0).is_err()); // 24 isn't a valid hour.
assert!(Time::try_from_hms_nano(0, 60, 0, 0).is_err()); // 60 isn't a valid minute.
assert!(Time::try_from_hms_nano(0, 0, 60, 0).is_err()); // 60 isn't a valid second.
assert!(Time::try_from_hms_nano(0, 0, 0, 1_000_000_000).is_err()); // 1_000_000_000 isn't a valid nanosecond.

pub fn now() -> Self

This is supported on feature="std" only.

Create a Time representing the current time (UTC).

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

pub const fn hour(self) -> u8

Get the clock hour.

The returned value will always be in the range 0..24.

assert_eq!(Time::try_from_hms(0, 0, 0).unwrap().hour(), 0);
assert_eq!(Time::try_from_hms(23, 59, 59).unwrap().hour(), 23);

pub const fn minute(self) -> u8

Get the minute within the hour.

The returned value will always be in the range 0..60.

assert_eq!(Time::try_from_hms(0, 0, 0).unwrap().minute(), 0);
assert_eq!(Time::try_from_hms(23, 59, 59).unwrap().minute(), 59);

pub const fn second(self) -> u8

Get the second within the minute.

The returned value will always be in the range 0..60.

assert_eq!(Time::try_from_hms(0, 0, 0).unwrap().second(), 0);
assert_eq!(Time::try_from_hms(23, 59, 59).unwrap().second(), 59);

pub const fn millisecond(self) -> u16

Get the milliseconds within the second.

The returned value will always be in the range 0..1_000.

assert_eq!(
    Time::try_from_hms_milli(0, 0, 0, 0).unwrap().millisecond(),
    0
);
assert_eq!(
    Time::try_from_hms_milli(23, 59, 59, 999)
        .unwrap()
        .millisecond(),
    999
);

pub const fn microsecond(self) -> u32

Get the microseconds within the second.

The returned value will always be in the range 0..1_000_000.

assert_eq!(
    Time::try_from_hms_micro(0, 0, 0, 0).unwrap().microsecond(),
    0
);
assert_eq!(
    Time::try_from_hms_micro(23, 59, 59, 999_999)
        .unwrap()
        .microsecond(),
    999_999
);

pub const fn nanosecond(self) -> u32

Get the nanoseconds within the second.

The returned value will always be in the range 0..1_000_000_000.

assert_eq!(Time::try_from_hms_nano(0, 0, 0, 0).unwrap().nanosecond(), 0);
assert_eq!(
    Time::try_from_hms_nano(23, 59, 59, 999_999_999)
        .unwrap()
        .nanosecond(),
    999_999_999
);

impl Time

Methods that allow formatting the Time.

pub fn format(self, format: &str) -> String

Format the Time using the provided string.

assert_eq!(
    Time::try_from_hms(0, 0, 0).unwrap().format("%r"),
    "12:00:00 am"
);

pub fn parse(s: &str, format: &str) -> Result<Self, ParseError>

Attempt to parse a Time using the provided string.

assert_eq!(
    Time::parse("0:00:00", "%T"),
    Ok(Time::try_from_hms(0, 0, 0).unwrap())
);
assert_eq!(
    Time::parse("23:59:59", "%T"),
    Ok(Time::try_from_hms(23, 59, 59).unwrap())
);
assert_eq!(
    Time::parse("12:00:00 am", "%r"),
    Ok(Time::try_from_hms(0, 0, 0).unwrap())
);
assert_eq!(
    Time::parse("12:00:00 pm", "%r"),
    Ok(Time::try_from_hms(12, 0, 0).unwrap())
);
assert_eq!(
    Time::parse("11:59:59 pm", "%r"),
    Ok(Time::try_from_hms(23, 59, 59).unwrap())
);

Trait Implementations

impl Add<Duration> for Time

type Output = Self

The resulting type after applying the + operator.

fn add(self, duration: Duration) -> Self::Output

Add the sub-day time of the Duration to the Time. Wraps on overflow.

assert_eq!(
    Time::try_from_hms(12, 0, 0).unwrap() + Duration::hours(2),
    Time::try_from_hms(14, 0, 0).unwrap()
);
assert_eq!(
    Time::try_from_hms(0, 0, 1).unwrap() + Duration::seconds(-2),
    Time::try_from_hms(23, 59, 59).unwrap()
);

impl Add<Duration> for Time

type Output = Self

The resulting type after applying the + operator.

fn add(self, duration: StdDuration) -> Self::Output

Add the sub-day time of the std::time::Duration to the Time. Wraps on overflow.

assert_eq!(
    Time::try_from_hms(12, 0, 0).unwrap() + Duration::from_secs(2 * 3_600),
    Time::try_from_hms(14, 0, 0).unwrap()
);
assert_eq!(
    Time::try_from_hms(23, 59, 59).unwrap() + Duration::from_secs(2),
    Time::try_from_hms(0, 0, 1).unwrap()
);

impl AddAssign<Duration> for Time

fn add_assign(&mut self, duration: Duration)

Add the sub-day time of the Duration to the existing Time. Wraps on overflow.

let mut time = Time::try_from_hms(12, 0, 0).unwrap();
time += Duration::hours(2);
assert_eq!(time, Time::try_from_hms(14, 0, 0).unwrap());

let mut time = Time::try_from_hms(0, 0, 1).unwrap();
time += Duration::seconds(-2);
assert_eq!(time, Time::try_from_hms(23, 59, 59).unwrap());

impl AddAssign<Duration> for Time

fn add_assign(&mut self, duration: StdDuration)

Add the sub-day time of the std::time::Duration to the existing Time. Wraps on overflow.

let mut time = Time::try_from_hms(12, 0, 0).unwrap();
time += Duration::from_secs(2 * 3_600);
assert_eq!(time, Time::try_from_hms(14, 0, 0).unwrap());

let mut time = Time::try_from_hms(23, 59, 59).unwrap();
time += Duration::from_secs(2);
assert_eq!(time, Time::try_from_hms(0, 0, 1).unwrap());

impl Clone for Time

fn clone(&self) -> Time

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Time

impl Debug for Time

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for Time

impl Hash for Time

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

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 Time

fn cmp(&self, other: &Self) -> 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

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

Restrict a value to a certain interval.

impl PartialEq<Time> for Time

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

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

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

This method tests for !=.

impl PartialOrd<Time> for Time

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

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

#[must_use] fn lt(&self, other: &Rhs) -> bool

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

#[must_use] fn le(&self, other: &Rhs) -> bool

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

#[must_use] fn gt(&self, other: &Rhs) -> bool

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

#[must_use] 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 StructuralEq for Time

impl StructuralPartialEq for Time

impl Sub<Duration> for Time

type Output = Self

The resulting type after applying the - operator.

fn sub(self, duration: Duration) -> Self::Output

Subtract the sub-day time of the Duration from the Time. Wraps on overflow.

assert_eq!(
    Time::try_from_hms(14, 0, 0).unwrap() - Duration::hours(2),
    Time::try_from_hms(12, 0, 0).unwrap()
);
assert_eq!(
    Time::try_from_hms(23, 59, 59).unwrap() - Duration::seconds(-2),
    Time::try_from_hms(0, 0, 1).unwrap()
);

impl Sub<Duration> for Time

type Output = Self

The resulting type after applying the - operator.

fn sub(self, duration: StdDuration) -> Self::Output

Subtract the sub-day time of the std::time::Duration from the Time. Wraps on overflow.

assert_eq!(
    Time::try_from_hms(14, 0, 0).unwrap() - Duration::from_secs(2 * 3_600),
    Time::try_from_hms(12, 0, 0).unwrap()
);
assert_eq!(
    Time::try_from_hms(0, 0, 1).unwrap() - Duration::from_secs(2),
    Time::try_from_hms(23, 59, 59).unwrap()
);

impl Sub<Time> for Time

type Output = Duration

The resulting type after applying the - operator.

fn sub(self, rhs: Self) -> Self::Output

Subtract two Times, returning the Duration between. This assumes both Times are in the same calendar day.

use time::{Duration, Time};
assert_eq!(
    Time::try_from_hms(0, 0, 0).unwrap() - Time::try_from_hms(0, 0, 0).unwrap(),
    Duration::zero()
);
assert_eq!(
    Time::try_from_hms(1, 0, 0).unwrap() - Time::try_from_hms(0, 0, 0).unwrap(),
    Duration::hour()
);
assert_eq!(
    Time::try_from_hms(0, 0, 0).unwrap() - Time::try_from_hms(1, 0, 0).unwrap(),
    Duration::hours(-1)
);
assert_eq!(
    Time::try_from_hms(0, 0, 0).unwrap() - Time::try_from_hms(23, 0, 0).unwrap(),
    Duration::hours(-23)
);

impl SubAssign<Duration> for Time

fn sub_assign(&mut self, duration: Duration)

Subtract the sub-day time of the Duration from the existing Time. Wraps on overflow.

let mut time = Time::try_from_hms(14, 0, 0).unwrap();
time -= Duration::hours(2);
assert_eq!(time, Time::try_from_hms(12, 0, 0).unwrap());

let mut time = Time::try_from_hms(23, 59, 59).unwrap();
time -= Duration::seconds(-2);
assert_eq!(time, Time::try_from_hms(0, 0, 1).unwrap());

impl SubAssign<Duration> for Time

fn sub_assign(&mut self, duration: StdDuration)

Subtract the sub-day time of the std::time::Duration from the existing Time. Wraps on overflow.

let mut time = Time::try_from_hms(14, 0, 0).unwrap();
time -= Duration::from_secs(2 * 3_600);
assert_eq!(time, Time::try_from_hms(12, 0, 0).unwrap());

let mut time = Time::try_from_hms(0, 0, 1).unwrap();
time -= Duration::from_secs(2);
assert_eq!(time, Time::try_from_hms(23, 59, 59).unwrap());