Struct biscuit::Timestamp

pub struct Timestamp(/* private fields */);

Wrapper around DateTime<Utc> to allow us to do custom de(serialization)

Methods from Deref<Target = DateTime<Utc>>

pub fn date(&self) -> Date<Tz>

👎Deprecated since 0.4.23: Use date_naive() instead

Retrieves the date component with an associated timezone.

Unless you are immediately planning on turning this into a DateTime with the same timezone you should use the date_naive method.

NaiveDate is a more well-defined type, and has more traits implemented on it, so should be preferred to Date any time you truly want to operate on dates.

Panics

DateTime internally stores the date and time in UTC with a NaiveDateTime. This method will panic if the offset from UTC would push the local date outside of the representable range of a Date.

pub fn date_naive(&self) -> NaiveDate

Retrieves the date component.

Panics

DateTime internally stores the date and time in UTC with a NaiveDateTime. This method will panic if the offset from UTC would push the local date outside of the representable range of a NaiveDate.

Example

use chrono::prelude::*;

let date: DateTime<Utc> = Utc.with_ymd_and_hms(2020, 1, 1, 0, 0, 0).unwrap();
let other: DateTime<FixedOffset> = FixedOffset::east_opt(23).unwrap().with_ymd_and_hms(2020, 1, 1, 0, 0, 0).unwrap();
assert_eq!(date.date_naive(), other.date_naive());

pub fn time(&self) -> NaiveTime

Retrieves the time component.

pub fn timestamp(&self) -> i64

Returns the number of non-leap seconds since January 1, 1970 0:00:00 UTC (aka “UNIX timestamp”).

The reverse operation of creating a DateTime from a timestamp can be performed using from_timestamp or TimeZone::timestamp_opt.

use chrono::{DateTime, TimeZone, Utc};

let dt: DateTime<Utc> = Utc.with_ymd_and_hms(2015, 5, 15, 0, 0, 0).unwrap();
assert_eq!(dt.timestamp(), 1431648000);

assert_eq!(DateTime::from_timestamp(dt.timestamp(), dt.timestamp_subsec_nanos()).unwrap(), dt);

pub fn timestamp_millis(&self) -> i64

Returns the number of non-leap-milliseconds since January 1, 1970 UTC.

Example

use chrono::{Utc, NaiveDate};

let dt = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap().and_hms_milli_opt(0, 0, 1, 444).unwrap().and_local_timezone(Utc).unwrap();
assert_eq!(dt.timestamp_millis(), 1_444);

let dt = NaiveDate::from_ymd_opt(2001, 9, 9).unwrap().and_hms_milli_opt(1, 46, 40, 555).unwrap().and_local_timezone(Utc).unwrap();
assert_eq!(dt.timestamp_millis(), 1_000_000_000_555);

pub fn timestamp_micros(&self) -> i64

Returns the number of non-leap-microseconds since January 1, 1970 UTC.

Example

use chrono::{Utc, NaiveDate};

let dt = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap().and_hms_micro_opt(0, 0, 1, 444).unwrap().and_local_timezone(Utc).unwrap();
assert_eq!(dt.timestamp_micros(), 1_000_444);

let dt = NaiveDate::from_ymd_opt(2001, 9, 9).unwrap().and_hms_micro_opt(1, 46, 40, 555).unwrap().and_local_timezone(Utc).unwrap();
assert_eq!(dt.timestamp_micros(), 1_000_000_000_000_555);

pub fn timestamp_nanos(&self) -> i64

👎Deprecated since 0.4.31: use timestamp_nanos_opt() instead

Returns the number of non-leap-nanoseconds since January 1, 1970 UTC.

Panics

An i64 with nanosecond precision can span a range of ~584 years. This function panics on an out of range DateTime.

The dates that can be represented as nanoseconds are between 1677-09-21T00:12:44.0 and 2262-04-11T23:47:16.854775804.

pub fn timestamp_nanos_opt(&self) -> Option<i64>

Returns the number of non-leap-nanoseconds since January 1, 1970 UTC.

Panics

An i64 with nanosecond precision can span a range of ~584 years. This function panics on an out of range DateTime.

The dates that can be represented as nanoseconds are between 1677-09-21T00:12:44.0 and 2262-04-11T23:47:16.854775804.

Example

use chrono::{Utc, NaiveDate};

let dt = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap().and_hms_nano_opt(0, 0, 1, 444).unwrap().and_local_timezone(Utc).unwrap();
assert_eq!(dt.timestamp_nanos_opt(), Some(1_000_000_444));

let dt = NaiveDate::from_ymd_opt(2001, 9, 9).unwrap().and_hms_nano_opt(1, 46, 40, 555).unwrap().and_local_timezone(Utc).unwrap();
assert_eq!(dt.timestamp_nanos_opt(), Some(1_000_000_000_000_000_555));

pub fn timestamp_subsec_millis(&self) -> u32

Returns the number of milliseconds since the last second boundary.

In event of a leap second this may exceed 999.

pub fn timestamp_subsec_micros(&self) -> u32

Returns the number of microseconds since the last second boundary.

In event of a leap second this may exceed 999,999.

pub fn timestamp_subsec_nanos(&self) -> u32

Returns the number of nanoseconds since the last second boundary

In event of a leap second this may exceed 999,999,999.

pub fn offset(&self) -> &<Tz as TimeZone>::Offset

Retrieves an associated offset from UTC.

pub fn timezone(&self) -> Tz

Retrieves an associated time zone.

pub fn with_timezone<Tz2>(&self, tz: &Tz2) -> DateTime<Tz2>where Tz2: TimeZone,

Changes the associated time zone. The returned DateTime references the same instant of time from the perspective of the provided time zone.

pub fn fixed_offset(&self) -> DateTime<FixedOffset>

Fix the offset from UTC to its current value, dropping the associated timezone information. This it useful for converting a generic DateTime<Tz: Timezone> to DateTime<FixedOffset>.

pub fn naive_utc(&self) -> NaiveDateTime

Returns a view to the naive UTC datetime.

pub fn naive_local(&self) -> NaiveDateTime

Returns a view to the naive local datetime.

Panics

DateTime internally stores the date and time in UTC with a NaiveDateTime. This method will panic if the offset from UTC would push the local datetime outside of the representable range of a NaiveDateTime.

pub fn years_since(&self, base: DateTime<Tz>) -> Option<u32>

Retrieve the elapsed years from now to the given DateTime.

Errors

Returns None if base < self.

pub fn to_rfc2822(&self) -> String

Returns an RFC 2822 date and time string such as Tue, 1 Jul 2003 10:52:37 +0200.

Panics

Panics if the date can not be represented in this format: the year may not be negative and can not have more than 4 digits.

pub fn to_rfc3339(&self) -> String

Returns an RFC 3339 and ISO 8601 date and time string such as 1996-12-19T16:39:57-08:00.

pub fn to_rfc3339_opts(&self, secform: SecondsFormat, use_z: bool) -> String

Return an RFC 3339 and ISO 8601 date and time string with subseconds formatted as per SecondsFormat.

If use_z is true and the timezone is UTC (offset 0), uses Z as per Fixed::TimezoneOffsetColonZ. If use_z is false, uses Fixed::TimezoneOffsetColon

Examples

let dt = NaiveDate::from_ymd_opt(2018, 1, 26).unwrap().and_hms_micro_opt(18, 30, 9, 453_829).unwrap().and_local_timezone(Utc).unwrap();
assert_eq!(dt.to_rfc3339_opts(SecondsFormat::Millis, false),
           "2018-01-26T18:30:09.453+00:00");
assert_eq!(dt.to_rfc3339_opts(SecondsFormat::Millis, true),
           "2018-01-26T18:30:09.453Z");
assert_eq!(dt.to_rfc3339_opts(SecondsFormat::Secs, true),
           "2018-01-26T18:30:09Z");

let pst = FixedOffset::east_opt(8 * 60 * 60).unwrap();
let dt = pst.from_local_datetime(&NaiveDate::from_ymd_opt(2018, 1, 26).unwrap().and_hms_micro_opt(10, 30, 9, 453_829).unwrap()).unwrap();
assert_eq!(dt.to_rfc3339_opts(SecondsFormat::Secs, true),
           "2018-01-26T10:30:09+08:00");

pub const MIN_UTC: DateTime<Utc> = _

pub const MAX_UTC: DateTime<Utc> = _

pub const UNIX_EPOCH: DateTime<Utc> = _

pub fn format_with_items<'a, I, B>(&self, items: I) -> DelayedFormat<I>where I: Iterator<Item = B> + Clone, B: Borrow<Item<'a>>,

Formats the combined date and time with the specified formatting items.

pub fn format<'a>(&self, fmt: &'a str) -> DelayedFormat<StrftimeItems<'a>>

Formats the combined date and time per the specified format string.

See the crate::format::strftime module for the supported escape sequences.

Example

use chrono::prelude::*;

let date_time: DateTime<Utc> = Utc.with_ymd_and_hms(2017, 04, 02, 12, 50, 32).unwrap();
let formatted = format!("{}", date_time.format("%d/%m/%Y %H:%M"));
assert_eq!(formatted, "02/04/2017 12:50");

Trait Implementations

impl Clone for Timestamp

fn clone(&self) -> Timestamp

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Timestamp

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

Formats the value using the given formatter.

impl Deref for Timestamp

type Target = DateTime<Utc>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'de> Deserialize<'de> for Timestamp

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

Deserialize this value from the given Serde deserializer.

impl From<DateTime<Utc>> for Timestamp

fn from(datetime: DateTime<Utc>) -> Self

Converts to this type from the input type.

impl From<Timestamp> for DateTime<Utc>

fn from(ts: Timestamp) -> Self

Converts to this type from the input type.

impl From<i64> for Timestamp

fn from(timestamp: i64) -> Self

Converts to this type from the input type.

impl PartialEq for Timestamp

fn eq(&self, other: &Timestamp) -> 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 !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Timestamp

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

Serialize this value into the given Serde serializer.

impl Copy for Timestamp

impl Eq for Timestamp

impl StructuralEq for Timestamp

impl StructuralPartialEq for Timestamp