1.0.0[−][src]Trait cron::lib::std::fmt::Display
Format trait for an empty format, {}
.
Display
is similar to Debug
, but Display
is for user-facing
output, and so cannot be derived.
For more information on formatters, see the module-level documentation.
Examples
Implementing Display
on a type:
use std::fmt; struct Point { x: i32, y: i32, } impl fmt::Display for Point { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "({}, {})", self.x, self.y) } } let origin = Point { x: 0, y: 0 }; assert_eq!(format!("The origin is: {}", origin), "The origin is: (0, 0)");
Required methods
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>
Formats the value using the given formatter.
Examples
use std::fmt; struct Position { longitude: f32, latitude: f32, } impl fmt::Display for Position { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "({}, {})", self.longitude, self.latitude) } } assert_eq!("(1.987, 2.983)", format!("{}", Position { longitude: 1.987, latitude: 2.983, }));
Implementations on Foreign Types
impl Display for Ipv4Addr
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impl<T> Display for SendError<T>
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impl Display for TryRecvError
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impl Display for IpAddr
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impl<'_> Display for Display<'_>
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impl Display for JoinPathsError
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impl Display for AccessError
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impl Display for ExitStatus
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impl Display for Ipv6Addr
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Write an Ipv6Addr, conforming to the canonical style described by RFC 5952.
impl Display for VarError
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impl Display for Error
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impl Display for SocketAddr
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impl<T> Display for PoisonError<T>
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impl Display for NulError
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impl Display for SocketAddrV4
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impl<'_, T> Display for MutexGuard<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for SocketAddrV6
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impl<'_, T> Display for RwLockReadGuard<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<'_, T> Display for RwLockWriteGuard<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for IntoStringError
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impl<W> Display for IntoInnerError<W>
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impl Display for RecvTimeoutError
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impl Display for SystemTimeError
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impl Display for FromBytesWithNulError
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impl<T> Display for TrySendError<T>
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impl<T> Display for TryLockError<T>
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impl Display for StripPrefixError
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impl Display for AddrParseError
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impl Display for RecvError
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impl Display for Backtrace
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impl Display for usize
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impl Display for EscapeDebug
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impl Display for ToLowercase
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impl Display for NonZeroU128
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impl Display for bool
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impl Display for EscapeDefault
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impl<P> Display for Pin<P> where
P: Display,
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P: Display,
impl Display for i16
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impl Display for TryFromIntError
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impl Display for NonZeroIsize
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impl Display for EscapeDefault
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impl Display for char
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impl Display for NonZeroU32
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impl Display for ParseIntError
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impl Display for u32
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impl Display for NonZeroI32
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impl Display for BorrowMutError
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impl Display for LayoutErr
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impl Display for TryFromSliceError
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impl Display for i8
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impl<'_, T> Display for RefMut<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<'_> Display for Location<'_>
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impl Display for ParseFloatError
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impl Display for NonZeroU64
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impl Display for AllocErr
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impl Display for f64
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impl Display for f32
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impl Display for Utf8Lossy
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impl Display for ParseCharError
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impl Display for u64
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impl Display for EscapeUnicode
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impl<T> Display for Wrapping<T> where
T: Display,
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T: Display,
impl<'_, T> Display for &'_ T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for NonZeroU8
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impl Display for str
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impl Display for i128
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impl Display for NonZeroI16
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impl Display for NonZeroI128
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impl Display for NonZeroI8
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impl Display for i64
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impl Display for BorrowError
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impl Display for NonZeroI64
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impl Display for !
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impl<'_, T> Display for &'_ mut T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for u16
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impl<'_, T> Display for Ref<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for DecodeUtf16Error
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impl Display for CharTryFromError
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impl Display for isize
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impl Display for u8
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impl<'_> Display for PanicInfo<'_>
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impl Display for NonZeroU16
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impl Display for i32
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impl Display for ToUppercase
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impl Display for NonZeroUsize
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impl Display for u128
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impl<T> Display for Arc<T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T> Display for Rc<T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<'_, B> Display for Cow<'_, B> where
B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,
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B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,
impl<'a> Display for SymbolName<'a>
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impl<'a> Display for Demangle<'a>
impl<'a> Display for TmFmt<'a>
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impl Display for OutOfRangeError
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impl Display for SteadyTime
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impl Display for ParseError
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impl Display for ParseFloatError
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impl<'a> Display for SymbolName<'a>
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impl<'a> Display for BytesOrWideString<'a>
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impl<'a> Display for Demangle<'a>
impl Display for DwRle
impl Display for DwLne
impl Display for DwUt
impl Display for Error
impl<R, Offset> Display for LineInstruction<R, Offset> where
Offset: ReaderOffset,
R: Reader<Offset = Offset>,
Offset: ReaderOffset,
R: Reader<Offset = Offset>,
impl Display for DwVirtuality
impl Display for DwAccess
impl Display for DwTag
impl Display for DwChildren
impl Display for DwForm
impl Display for DwEnd
impl Display for DwEhPe
impl Display for DwCfa
impl Display for DwLns
impl Display for DwLang
impl Display for DwAte
impl Display for DwCc
impl Display for DwDsc
impl Display for DwId
impl Display for DwAddr
impl Display for DwMacro
impl Display for DwVis
impl Display for DwDefaulted
impl Display for DwOp
impl Display for DwDs
impl Display for DwAt
impl Display for DwInl
impl Display for DwOrd
impl Display for DwLnct
impl Display for DwIdx
impl Display for DwLle
impl Display for Error
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Implementors
impl Display for Weekday
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impl Display for cron::error::ErrorKind
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impl Display for cron::example_generated::ErrorKind
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impl Display for cron::example_generated::inner::ErrorKind
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impl Display for TryReserveError
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impl Display for Infallible
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impl Display for cron::error::Error
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impl Display for cron::example_generated::inner::Error
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impl Display for cron::example_generated::Error
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impl Display for cron::lib::std::fmt::Error
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impl Display for ParseBoolError
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impl Display for Utf8Error
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impl Display for FromUtf16Error
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impl Display for FromUtf8Error
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impl Display for String
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impl Display for Duration
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impl Display for FixedOffset
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impl Display for NaiveDate
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The Display
output of the naive date d
is the same as
d.format("%Y-%m-%d")
.
The string printed can be readily parsed via the parse
method on str
.
Example
use chrono::NaiveDate; assert_eq!(format!("{}", NaiveDate::from_ymd(2015, 9, 5)), "2015-09-05"); assert_eq!(format!("{}", NaiveDate::from_ymd( 0, 1, 1)), "0000-01-01"); assert_eq!(format!("{}", NaiveDate::from_ymd(9999, 12, 31)), "9999-12-31");
ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE.
assert_eq!(format!("{}", NaiveDate::from_ymd( -1, 1, 1)), "-0001-01-01"); assert_eq!(format!("{}", NaiveDate::from_ymd(10000, 12, 31)), "+10000-12-31");
impl Display for NaiveDateTime
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The Debug
output of the naive date and time dt
is the same as
dt.format("%Y-%m-%d %H:%M:%S%.f")
.
It should be noted that, for leap seconds not on the minute boundary, it may print a representation not distinguishable from non-leap seconds. This doesn't matter in practice, since such leap seconds never happened. (By the time of the first leap second on 1972-06-30, every time zone offset around the world has standardized to the 5-minute alignment.)
Example
use chrono::NaiveDate; let dt = NaiveDate::from_ymd(2016, 11, 15).and_hms(7, 39, 24); assert_eq!(format!("{}", dt), "2016-11-15 07:39:24");
Leap seconds may also be used.
let dt = NaiveDate::from_ymd(2015, 6, 30).and_hms_milli(23, 59, 59, 1_500); assert_eq!(format!("{}", dt), "2015-06-30 23:59:60.500");
impl Display for NaiveTime
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The Display
output of the naive time t
is the same as
t.format("%H:%M:%S%.f")
.
The string printed can be readily parsed via the parse
method on str
.
It should be noted that, for leap seconds not on the minute boundary, it may print a representation not distinguishable from non-leap seconds. This doesn't matter in practice, since such leap seconds never happened. (By the time of the first leap second on 1972-06-30, every time zone offset around the world has standardized to the 5-minute alignment.)
Example
use chrono::NaiveTime; assert_eq!(format!("{}", NaiveTime::from_hms(23, 56, 4)), "23:56:04"); assert_eq!(format!("{}", NaiveTime::from_hms_milli(23, 56, 4, 12)), "23:56:04.012"); assert_eq!(format!("{}", NaiveTime::from_hms_micro(23, 56, 4, 1234)), "23:56:04.001234"); assert_eq!(format!("{}", NaiveTime::from_hms_nano(23, 56, 4, 123456)), "23:56:04.000123456");
Leap seconds may also be used.
assert_eq!(format!("{}", NaiveTime::from_hms_milli(6, 59, 59, 1_500)), "06:59:60.500");
impl Display for cron::ParseError
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impl Display for Utc
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impl<'_> Display for Arguments<'_>
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impl<'a> Display for cron::lib::std::str::EscapeDebug<'a>
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impl<'a> Display for cron::lib::std::str::EscapeDefault<'a>
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impl<'a> Display for cron::lib::std::str::EscapeUnicode<'a>
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impl<'a> Display for CompleteStr<'a>
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impl<'a, I, B> Display for DelayedFormat<I> where
B: Borrow<Item<'a>>,
I: Clone + Iterator<Item = B>,
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B: Borrow<Item<'a>>,
I: Clone + Iterator<Item = B>,
impl<'a, T> Display for cron::Display<'a, T> where
T: ChainedError,
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T: ChainedError,
impl<I, E> Display for Err<I, E> where
E: Debug,
I: Debug,
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E: Debug,
I: Debug,
impl<T> Display for Box<T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<Tz> Display for Date<Tz> where
Tz: TimeZone,
<Tz as TimeZone>::Offset: Display,
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Tz: TimeZone,
<Tz as TimeZone>::Offset: Display,
impl<Tz> Display for DateTime<Tz> where
Tz: TimeZone,
<Tz as TimeZone>::Offset: Display,
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Tz: TimeZone,
<Tz as TimeZone>::Offset: Display,