Struct DateTime

pub struct DateTime { /* private fields */ }

DateTime in time.

DateTime in time represented as seconds and sub-second nanos since the Unix epoch (January 1, 1970 at midnight UTC/GMT).

This type can be converted to/from the standard library’s SystemTime:

let the_millennium_as_system_time = SystemTime::try_from(DateTime::from_secs(946_713_600))?;
let now_as_date_time = DateTime::from(SystemTime::now());

The aws-smithy-types-convert crate can be used for conversions to/from other libraries, such as time or chrono.

Implementations

impl DateTime

pub fn from_secs(epoch_seconds: i64) -> DateTime

Creates a DateTime from a number of seconds since the Unix epoch.

pub fn from_millis(epoch_millis: i64) -> DateTime

Creates a DateTime from a number of milliseconds since the Unix epoch.

pub fn from_nanos(epoch_nanos: i128) -> Result<DateTime, ConversionError>

Creates a DateTime from a number of nanoseconds since the Unix epoch.

pub fn as_nanos(&self) -> i128

Returns the number of nanoseconds since the Unix epoch that this DateTime represents.

pub fn from_fractional_secs(epoch_seconds: i64, fraction: f64) -> DateTime

Creates a DateTime from a number of seconds and a fractional second since the Unix epoch.

Example

assert_eq!(
    DateTime::from_secs_and_nanos(1, 500_000_000u32),
    DateTime::from_fractional_secs(1, 0.5),
);

pub fn from_secs_and_nanos(seconds: i64, subsecond_nanos: u32) -> DateTime

Creates a DateTime from a number of seconds and sub-second nanos since the Unix epoch.

Panics

This function will panic if subsecond_nanos is >= 1_000_000_000

Example

assert_eq!(
    DateTime::from_fractional_secs(1, 0.5),
    DateTime::from_secs_and_nanos(1, 500_000_000u32),
);

pub fn as_secs_f64(&self) -> f64

Returns the DateTime value as an f64 representing the seconds since the Unix epoch.

Note: This conversion will lose precision due to the nature of floating point numbers.

pub fn from_secs_f64(epoch_seconds: f64) -> DateTime

Creates a DateTime from an f64 representing the number of seconds since the Unix epoch.

Example

assert_eq!(
    DateTime::from_fractional_secs(1, 0.5),
    DateTime::from_secs_f64(1.5),
);

pub fn from_str(s: &str, format: Format) -> Result<DateTime, DateTimeParseError>

Parses a DateTime from a string using the given format.

pub fn has_subsec_nanos(&self) -> bool

Returns true if sub-second nanos is greater than zero.

pub fn secs(&self) -> i64

Returns the epoch seconds component of the DateTime.

Note: this does not include the sub-second nanos.

pub fn set_seconds(&mut self, seconds: i64) -> &mut DateTime

Set the seconds component of this DateTime.

pub fn subsec_nanos(&self) -> u32

Returns the sub-second nanos component of the DateTime.

Note: this does not include the number of seconds since the epoch.

pub fn set_subsec_nanos(&mut self, subsec_nanos: u32) -> &mut DateTime

Set the “sub-second” nanoseconds of this DateTime.

pub fn to_millis(self) -> Result<i64, ConversionError>

Converts the DateTime to the number of milliseconds since the Unix epoch.

This is fallible since DateTime holds more precision than an i64, and will return a ConversionError for DateTime values that can’t be converted.

pub fn read( s: &str, format: Format, delim: char, ) -> Result<(DateTime, &str), DateTimeParseError>

Read 1 date of format from s, expecting either delim or EOF

Enable parsing multiple dates from the same string

pub fn fmt(&self, format: Format) -> Result<String, DateTimeFormatError>

Formats the DateTime to a string using the given format.

Returns an error if the given DateTime cannot be represented by the desired format.

Trait Implementations

impl Clone for DateTime

fn clone(&self) -> DateTime

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DateTime

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

Formats the value using the given formatter.

impl Display for DateTime

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

Formats the value using the given formatter.

impl From<SystemTime> for DateTime

fn from(time: SystemTime) -> DateTime

Converts to this type from the input type.

impl Hash for DateTime

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 DateTime

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

fn eq(&self, other: &DateTime) -> 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 DateTime

fn partial_cmp(&self, other: &DateTime) -> 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 Copy for DateTime

impl Eq for DateTime

impl StructuralPartialEq for DateTime