Struct Time

#[repr(C)]
pub struct Time { /* private fields */ }

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.

Implementations

impl Time

pub const MIDNIGHT: Self = _

A Time that is exactly midnight. This is the smallest possible value for a Time.

assert_eq!(Time::MIDNIGHT, time!(0:00));

pub const MAX: Self = _

A Time that is one nanosecond before midnight. This is the largest possible value for a Time.

assert_eq!(Time::MAX, time!(23:59:59.999_999_999));

pub const fn from_hms( hour: u8, minute: u8, second: u8, ) -> Result<Self, ComponentRange>

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

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

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

pub const fn from_hms_milli( hour: u8, minute: u8, second: u8, millisecond: u16, ) -> Result<Self, ComponentRange>

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

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

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

pub const fn from_hms_micro( hour: u8, minute: u8, second: u8, microsecond: u32, ) -> Result<Self, ComponentRange>

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

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

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

pub const fn from_hms_nano( hour: u8, minute: u8, second: u8, nanosecond: u32, ) -> Result<Self, ComponentRange>

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

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

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

pub const fn as_hms(self) -> (u8, u8, u8)

Get the clock hour, minute, and second.

assert_eq!(time!(0:00:00).as_hms(), (0, 0, 0));
assert_eq!(time!(23:59:59).as_hms(), (23, 59, 59));

pub const fn as_hms_milli(self) -> (u8, u8, u8, u16)

Get the clock hour, minute, second, and millisecond.

assert_eq!(time!(0:00:00).as_hms_milli(), (0, 0, 0, 0));
assert_eq!(time!(23:59:59.999).as_hms_milli(), (23, 59, 59, 999));

pub const fn as_hms_micro(self) -> (u8, u8, u8, u32)

Get the clock hour, minute, second, and microsecond.

assert_eq!(time!(0:00:00).as_hms_micro(), (0, 0, 0, 0));
assert_eq!(
    time!(23:59:59.999_999).as_hms_micro(),
    (23, 59, 59, 999_999)
);

pub const fn as_hms_nano(self) -> (u8, u8, u8, u32)

Get the clock hour, minute, second, and nanosecond.

assert_eq!(time!(0:00:00).as_hms_nano(), (0, 0, 0, 0));
assert_eq!(
    time!(23:59:59.999_999_999).as_hms_nano(),
    (23, 59, 59, 999_999_999)
);

pub const fn hour(self) -> u8

Get the clock hour.

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

assert_eq!(time!(0:00:00).hour(), 0);
assert_eq!(time!(23:59:59).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!(0:00:00).minute(), 0);
assert_eq!(time!(23:59:59).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!(0:00:00).second(), 0);
assert_eq!(time!(23:59:59).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!(0:00).millisecond(), 0);
assert_eq!(time!(23:59:59.999).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!(0:00).microsecond(), 0);
assert_eq!(time!(23:59:59.999_999).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!(0:00).nanosecond(), 0);
assert_eq!(time!(23:59:59.999_999_999).nanosecond(), 999_999_999);

pub const fn replace_hour(self, hour: u8) -> Result<Self, ComponentRange>

Replace the clock hour.

assert_eq!(
    time!(01:02:03.004_005_006).replace_hour(7),
    Ok(time!(07:02:03.004_005_006))
);
assert!(time!(01:02:03.004_005_006).replace_hour(24).is_err()); // 24 isn't a valid hour

pub const fn replace_minute(self, minute: u8) -> Result<Self, ComponentRange>

Replace the minutes within the hour.

assert_eq!(
    time!(01:02:03.004_005_006).replace_minute(7),
    Ok(time!(01:07:03.004_005_006))
);
assert!(time!(01:02:03.004_005_006).replace_minute(60).is_err()); // 60 isn't a valid minute

pub const fn replace_second(self, second: u8) -> Result<Self, ComponentRange>

Replace the seconds within the minute.

assert_eq!(
    time!(01:02:03.004_005_006).replace_second(7),
    Ok(time!(01:02:07.004_005_006))
);
assert!(time!(01:02:03.004_005_006).replace_second(60).is_err()); // 60 isn't a valid second

pub const fn replace_millisecond( self, millisecond: u16, ) -> Result<Self, ComponentRange>

Replace the milliseconds within the second.

assert_eq!(
    time!(01:02:03.004_005_006).replace_millisecond(7),
    Ok(time!(01:02:03.007))
);
assert!(time!(01:02:03.004_005_006)
    .replace_millisecond(1_000)
    .is_err()); // 1_000 isn't a valid millisecond

pub const fn replace_microsecond( self, microsecond: u32, ) -> Result<Self, ComponentRange>

Replace the microseconds within the second.

assert_eq!(
    time!(01:02:03.004_005_006).replace_microsecond(7_008),
    Ok(time!(01:02:03.007_008))
);
assert!(time!(01:02:03.004_005_006)
    .replace_microsecond(1_000_000)
    .is_err()); // 1_000_000 isn't a valid microsecond

pub const fn replace_nanosecond( self, nanosecond: u32, ) -> Result<Self, ComponentRange>

Replace the nanoseconds within the second.

assert_eq!(
    time!(01:02:03.004_005_006).replace_nanosecond(7_008_009),
    Ok(time!(01:02:03.007_008_009))
);
assert!(time!(01:02:03.004_005_006)
    .replace_nanosecond(1_000_000_000)
    .is_err()); // 1_000_000_000 isn't a valid nanosecond

impl Time

pub fn format_into( self, output: &mut impl Write, format: &(impl Formattable + ?Sized), ) -> Result<usize, Format>

Available on crate feature formatting only.

Format the Time using the provided format description.

pub fn format( self, format: &(impl Formattable + ?Sized), ) -> Result<String, Format>

Available on crate feature formatting only.

Format the Time using the provided format description.

let format = format_description::parse("[hour]:[minute]:[second]")?;
assert_eq!(time!(12:00).format(&format)?, "12:00:00");

impl Time

pub fn parse( input: &str, description: &(impl Parsable + ?Sized), ) -> Result<Self, Parse>

Available on crate feature parsing only.

Parse a Time from the input using the provided format description.

let format = format_description!("[hour]:[minute]:[second]");
assert_eq!(Time::parse("12:00:00", &format)?, time!(12:00));

Trait Implementations

impl Add<Duration> for Time

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

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

assert_eq!(time!(12:00) + 2.hours(), time!(14:00));
assert_eq!(time!(0:00:01) + (-2).seconds(), time!(23:59:59));

type Output = Time

The resulting type after applying the + operator.

impl Add<Duration> for Time

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!(12:00) + 2.std_hours(), time!(14:00));
assert_eq!(time!(23:59:59) + 2.std_seconds(), time!(0:00:01));

type Output = Time

The resulting type after applying the + operator.

impl AddAssign<Duration> for Time

fn add_assign(&mut self, rhs: Duration)

Performs the += operation.

impl AddAssign<Duration> for Time

fn add_assign(&mut self, rhs: StdDuration)

Performs the += operation.

impl Arbitrary for Time

Available on crate feature quickcheck only.

fn arbitrary(g: &mut Gen) -> Self

Return an arbitrary value.

fn shrink(&self) -> Box<dyn Iterator<Item = Self>>

Return an iterator of values that are smaller than itself.

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 Debug for Time

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

Formats the value using the given formatter.

impl<'a> Deserialize<'a> for Time

Available on crate feature serde only.

fn deserialize<D: Deserializer<'a>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Display for Time

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

Formats the value using the given formatter.

impl Distribution<Time> for Standard

Available on crate feature rand only.

fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> Time

Generate a random value of T, using rng as the source of randomness.

fn sample_iter<R>(self, rng: R) -> DistIter<Self, R, T>

where R: Rng, Self: Sized,

Create an iterator that generates random values of T, using rng as the source of randomness.

fn map<F, S>(self, func: F) -> DistMap<Self, F, T, S>

where F: Fn(T) -> S, Self: Sized,

Create a distribution of values of ‘S’ by mapping the output of Self through the closure F

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, Self: Sized,

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

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 Time

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

fn partial_cmp(&self, other: &Self) -> 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 Serialize for Time

Available on crate feature serde only.

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl SmartDisplay for Time

type Metadata = TimeMetadata

User-provided metadata type.

fn metadata(&self, _: FormatterOptions) -> Metadata<'_, Self>

Compute any information needed to format the value. This must, at a minimum, determine the width of the value before any padding is added by the formatter.

fn fmt_with_metadata( &self, f: &mut Formatter<'_>, metadata: Metadata<'_, Self>, ) -> Result

Format the value using the given formatter and metadata. The formatted output should have the width indicated by the metadata. This is before any padding is added by the formatter.

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

Format the value using the given formatter. This is the same as Display::fmt.

impl Sub<Duration> for Time

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

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

assert_eq!(time!(14:00) - 2.hours(), time!(12:00));
assert_eq!(time!(23:59:59) - (-2).seconds(), time!(0:00:01));

type Output = Time

The resulting type after applying the - operator.

impl Sub<Duration> for Time

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!(14:00) - 2.std_hours(), time!(12:00));
assert_eq!(time!(0:00:01) - 2.std_seconds(), time!(23:59:59));

type Output = Time

The resulting type after applying the - operator.

impl Sub for Time

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

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

assert_eq!(time!(0:00) - time!(0:00), 0.seconds());
assert_eq!(time!(1:00) - time!(0:00), 1.hours());
assert_eq!(time!(0:00) - time!(1:00), (-1).hours());
assert_eq!(time!(0:00) - time!(23:00), (-23).hours());

type Output = Duration

The resulting type after applying the - operator.

impl SubAssign<Duration> for Time

fn sub_assign(&mut self, rhs: Duration)

Performs the -= operation.

impl SubAssign<Duration> for Time

fn sub_assign(&mut self, rhs: StdDuration)

Performs the -= operation.

impl TryFrom<Parsed> for Time

Available on crate feature parsing only.

type Error = TryFromParsed

The type returned in the event of a conversion error.

fn try_from(parsed: Parsed) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for Time

impl Eq for Time