Trait chrono::DurationRound [−][src]
pub trait DurationRound: Sized { type Err: Error; fn duration_round(self, duration: Duration) -> Result<Self, Self::Err>; fn duration_trunc(self, duration: Duration) -> Result<Self, Self::Err>; }
Extension trait for rounding or truncating a DateTime by a Duration.
Limitations
Both rounding and truncating are done via Duration::num_nanoseconds
and
DateTime::timestamp_nanos
. This means that they will fail if either the
Duration
or the DateTime
are too big to represented as nanoseconds. They
will also fail if the Duration
is bigger than the timestamp.
Associated Types
Loading content...Required methods
fn duration_round(self, duration: Duration) -> Result<Self, Self::Err>
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Return a copy rounded by Duration.
Example
let dt = Utc.ymd(2018, 1, 11).and_hms_milli(12, 0, 0, 154); assert_eq!( dt.duration_round(Duration::milliseconds(10)).unwrap().to_string(), "2018-01-11 12:00:00.150 UTC" ); assert_eq!( dt.duration_round(Duration::days(1)).unwrap().to_string(), "2018-01-12 00:00:00 UTC" );
fn duration_trunc(self, duration: Duration) -> Result<Self, Self::Err>
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Return a copy truncated by Duration.
Example
let dt = Utc.ymd(2018, 1, 11).and_hms_milli(12, 0, 0, 154); assert_eq!( dt.duration_trunc(Duration::milliseconds(10)).unwrap().to_string(), "2018-01-11 12:00:00.150 UTC" ); assert_eq!( dt.duration_trunc(Duration::days(1)).unwrap().to_string(), "2018-01-11 00:00:00 UTC" );
Implementors
impl<Tz: TimeZone> DurationRound for DateTime<Tz>
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impl<Tz: TimeZone> DurationRound for DateTime<Tz>
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