1.0.0[−][src]Trait geng::prelude::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 IpAddr
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impl Display for FromVecWithNulError
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impl Display for FromBytesWithNulError
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impl<T> Display for SendError<T>
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impl<W> Display for IntoInnerError<W>
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impl Display for NulError
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impl Display for StripPrefixError
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impl Display for VarError
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impl Display for SystemTimeError
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impl Display for Ipv4Addr
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impl Display for RecvTimeoutError
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impl Display for AccessError
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impl<'_, T> Display for RwLockReadGuard<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for Backtrace
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impl Display for AddrParseError
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impl Display for IntoStringError
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impl<'_> Display for Display<'_>
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impl Display for TryRecvError
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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 SocketAddrV6
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impl<'_, T> Display for RwLockWriteGuard<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for ExitStatus
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impl Display for JoinPathsError
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impl<T> Display for TryLockError<T>
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impl Display for RecvError
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impl<T> Display for TrySendError<T>
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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 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 NonZeroU16
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impl Display for NonZeroI8
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impl Display for i8
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impl Display for Utf8Error
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impl<'_, T> Display for &'_ T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for EscapeUnicode
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impl Display for i128
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impl<'_> Display for Location<'_>
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impl Display for NonZeroI32
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impl Display for ParseIntError
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impl Display for i32
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impl Display for Utf8Lossy
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impl Display for NonZeroI128
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impl<T> Display for Wrapping<T> where
T: Display,
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T: Display,
impl Display for BorrowMutError
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impl Display for CharTryFromError
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impl Display for u8
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impl Display for char
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impl Display for !
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impl Display for i64
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impl<'a> Display for EscapeDefault<'a>
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impl Display for ParseCharError
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impl Display for ToLowercase
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impl Display for NonZeroI64
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impl Display for isize
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impl Display for u64
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impl Display for NonZeroI16
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impl Display for EscapeDebug
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impl Display for usize
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impl Display for NonZeroU32
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impl Display for f64
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impl Display for bool
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impl Display for u16
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impl Display for NonZeroUsize
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impl<'a> Display for EscapeUnicode<'a>
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impl Display for BorrowError
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impl Display for LayoutError
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impl Display for ParseFloatError
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impl Display for str
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impl Display for u32
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impl Display for ToUppercase
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impl Display for EscapeDefault
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impl Display for ParseBoolError
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impl Display for Infallible
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impl Display for EscapeDefault
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impl Display for u128
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impl Display for NonZeroU64
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impl<'_> Display for PanicInfo<'_>
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impl Display for f32
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impl<'a> Display for EscapeDebug<'a>
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impl<'_> Display for Arguments<'_>
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impl Display for NonZeroU8
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impl Display for NonZeroIsize
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impl Display for TryFromSliceError
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impl Display for DecodeUtf16Error
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impl Display for Error
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impl Display for AllocError
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impl Display for NonZeroU128
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impl<'_, T> Display for &'_ mut T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for TryFromIntError
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impl Display for i16
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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 Display for FromUtf8Error
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impl Display for String
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impl Display for TryReserveError
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impl<T, A> Display for Box<T, A> where
A: AllocRef,
T: Display + ?Sized,
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A: AllocRef,
T: Display + ?Sized,
impl Display for FromUtf16Error
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impl<'a> Display for ANSIGenericStrings<'a, str>
impl Display for Suffix
impl Display for Infix
impl Display for Prefix
impl<'a> Display for ANSIGenericString<'a, str>
impl Display for Error
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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 DwEhPe
impl Display for DwLle
impl Display for DwLnct
impl Display for DwAte
impl Display for DwAddr
impl Display for DwEnd
impl Display for DwIdx
impl Display for DwCc
impl Display for DwVirtuality
impl Display for DwLne
impl Display for DwMacro
impl Display for Error
impl Display for DwId
impl<R, Offset> Display for LineInstruction<R, Offset> where
Offset: ReaderOffset,
R: Reader<Offset = Offset>,
Offset: ReaderOffset,
R: Reader<Offset = Offset>,
impl Display for DwDs
impl Display for DwChildren
impl Display for DwDefaulted
impl Display for DwInl
impl Display for DwLns
impl Display for DwOrd
impl Display for DwLang
impl Display for DwAt
impl Display for DwCfa
impl Display for DwAccess
impl Display for DwDsc
impl Display for DwRle
impl Display for DwVis
impl Display for DwForm
impl Display for DwOp
impl Display for DwTag
impl Display for DwUt
impl Display for Error
impl Display for NaiveDateTime
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The Display
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 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 FixedOffset
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impl Display for RoundingError
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impl Display for ParseError
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impl Display for Utc
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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<'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<Tz> Display for DateTime<Tz> where
Tz: TimeZone,
<Tz as TimeZone>::Offset: Display,
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Tz: TimeZone,
<Tz as TimeZone>::Offset: Display,
impl Display for Weekday
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impl Display for OutOfRangeError
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impl Display for Duration
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impl<'a> Display for TmFmt<'a>
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impl Display for ParseError
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impl Display for SteadyTime
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impl Display for ParseFloatError
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impl Display for ParseColorError
impl Display for ShaderCompilationError
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impl Display for ProgramLinkError
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impl<Enum> Display for TryFromPrimitiveError<Enum> where
Enum: TryFromPrimitive,
Enum: TryFromPrimitive,
impl Display for ContextError
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impl Display for CreationError
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impl Display for OpenError
impl<T> Display for EventLoopClosed<T>
impl Display for BadIcon
impl Display for ExternalError
impl Display for NotSupportedError
impl Display for XError
impl Display for VideoMode
impl Display for OsError
impl Display for XNotSupported
impl<'a, R, T> Display for RwLockWriteGuard<'a, R, T> where
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
impl<'a, R, T> Display for MappedRwLockWriteGuard<'a, R, T> where
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
impl<'a, R, T> Display for MutexGuard<'a, R, T> where
R: 'a + RawMutex,
T: 'a + Display + ?Sized,
R: 'a + RawMutex,
T: 'a + Display + ?Sized,
impl<'a, R, G, T> Display for MappedReentrantMutexGuard<'a, R, G, T> where
G: 'a + GetThreadId,
R: 'a + RawMutex,
T: 'a + Display + ?Sized,
G: 'a + GetThreadId,
R: 'a + RawMutex,
T: 'a + Display + ?Sized,
impl<'a, R, T> Display for RwLockReadGuard<'a, R, T> where
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
impl<'a, R, T> Display for RwLockUpgradableReadGuard<'a, R, T> where
R: 'a + RawRwLockUpgrade,
T: 'a + Display + ?Sized,
R: 'a + RawRwLockUpgrade,
T: 'a + Display + ?Sized,
impl<'a, R, G, T> Display for ReentrantMutexGuard<'a, R, G, T> where
G: 'a + GetThreadId,
R: 'a + RawMutex,
T: 'a + Display + ?Sized,
G: 'a + GetThreadId,
R: 'a + RawMutex,
T: 'a + Display + ?Sized,
impl<'a, R, T> Display for MappedRwLockReadGuard<'a, R, T> where
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
impl<'a, R, T> Display for MappedMutexGuard<'a, R, T> where
R: 'a + RawMutex,
T: 'a + Display + ?Sized,
R: 'a + RawMutex,
T: 'a + Display + ?Sized,
impl Display for CollectionAllocErr
impl Display for Error
impl<E> Display for InsertError<E>
impl Display for Signal
impl Display for Gid
impl Display for SockAddr
impl Display for IpAddr
impl Display for Errno
impl Display for TimeSpec
impl Display for LinkAddr
impl Display for Ipv4Addr
impl Display for AlgAddr
impl Display for VsockAddr
impl Display for UnixAddr
impl Display for NetlinkAddr
impl Display for Pid
impl Display for InetAddr
impl Display for Error
impl Display for Uid
impl Display for TimeVal
impl Display for Ipv6Addr
impl Display for GlobalError
impl Display for ConnectError
impl Display for ProtocolError
impl Display for MessageWriteError
impl Display for MessageParseError
impl Display for Argument
impl Display for Image
impl<E> Display for Err<E> where
E: Debug,
E: Debug,
impl Display for CacheReadErr
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impl Display for CacheWriteErr
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impl Display for Tag
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impl<'a, T> Display for ShardedLockReadGuard<'a, T> where
T: Display + ?Sized,
T: Display + ?Sized,
impl<'a, T> Display for ShardedLockWriteGuard<'a, T> where
T: Display + ?Sized,
T: Display + ?Sized,
impl Display for Error
impl Display for BaseDirectoriesError
impl Display for TextPosition
impl<'a> Display for Name<'a>
impl Display for Error
impl Display for XmlVersion
impl Display for OwnedName
impl<'a> Display for Attribute<'a>
impl Display for EmitterError
impl<'a, 'b> Display for ReprDisplay<'a, 'b> where
'b: 'a,
'b: 'a,
impl Display for OwnedAttribute
impl<'a> Display for PercentEncode<'a>
impl<T> Display for SendError<T>
impl<T> Display for TrySendError<T>
impl Display for DecodingError
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impl Display for ParameterError
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impl Display for Error
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impl Display for EncodingError
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impl Display for LimitError
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impl Display for ImageError
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impl Display for UnsupportedError
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impl Display for ImageFormatHint
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impl Display for TiffFormatError
impl Display for TiffError
impl Display for TiffUnsupportedError
impl Display for Error
impl<L, R> Display for Either<L, R> where
L: Display,
R: Display,
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L: Display,
R: Display,
impl Display for ThreadPoolBuildError
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impl Display for RecvError
impl Display for TryRecvError
impl Display for RecvTimeoutError
impl Display for SelectTimeoutError
impl<T> Display for SendTimeoutError<T>
impl<T> Display for SendError<T>
impl<T> Display for TrySendError<T>
impl Display for TrySelectError
impl<'_, T> Display for ShardedLockWriteGuard<'_, T> where
T: Display + ?Sized,
T: Display + ?Sized,
impl<'_, T> Display for ShardedLockReadGuard<'_, T> where
T: Display + ?Sized,
T: Display + ?Sized,
impl Display for LzwError
impl Display for EncodingError
impl Display for DecodingError
impl Display for DecodingFormatError
impl Display for ParseRatioError
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impl<T> Display for Ratio<T> where
T: Clone + Display + Integer,
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T: Clone + Display + Integer,
impl Display for EncodingError
impl Display for DisposeOp
impl Display for DecodingError
impl Display for BlendOp
impl Display for MatchingType
impl Display for PodCastError
impl Display for Error
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impl Display for Frame
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impl Display for OpCode
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impl Display for Response
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impl Display for Request
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impl Display for Message
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impl Display for Error
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impl Display for InvalidChunkSize
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impl Display for InvalidOutputSize
impl Display for ParseError
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impl<S> Display for Host<S> where
S: AsRef<str>,
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S: AsRef<str>,
impl Display for Url
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Display the serialization of this URL.
impl Display for SyntaxViolation
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impl<I> Display for Recompositions<I> where
I: Clone + Iterator<Item = char>,
I: Clone + Iterator<Item = char>,
impl<I> Display for Decompositions<I> where
I: Clone + Iterator<Item = char>,
I: Clone + Iterator<Item = char>,
impl<'s, T> Display for SliceVec<'s, T> where
T: Display,
T: Display,
impl<A> Display for TinyVec<A> where
A: Array,
<A as Array>::Item: Display,
A: Array,
<A as Array>::Item: Display,
impl<A> Display for ArrayVec<A> where
A: Array,
<A as Array>::Item: Display,
A: Array,
<A as Array>::Item: Display,
impl Display for PlayError
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impl Display for DecoderError
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impl Display for StreamError
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impl Display for DeviceNameError
impl Display for DefaultStreamConfigError
impl Display for PauseStreamError
impl Display for PlayStreamError
impl Display for BuildStreamError
impl Display for StreamError
impl Display for SupportedStreamConfigsError
impl Display for DevicesError
impl Display for HostUnavailable
impl Display for BackendSpecificError
impl Display for Chmap
impl Display for SelemChannelId
impl Display for Output
impl Display for Error
impl Display for ChmapPosition
impl Display for Ipv6Addr
impl Display for AlgAddr
impl Display for TimeSpec
impl Display for Signal
impl Display for Gid
impl Display for VsockAddr
impl Display for SockAddr
impl Display for NetlinkAddr
impl Display for Errno
impl Display for TimeVal
impl Display for LinkAddr
impl Display for Ipv4Addr
impl Display for Pid
impl Display for IpAddr
impl Display for InetAddr
impl Display for UnixAddr
impl Display for Error
impl Display for Uid
impl Display for Void
impl Display for Error
impl Display for Error
impl Display for AudioReadError
impl Display for HeaderReadError
impl Display for VorbisError
impl<A> Display for TinyVec<A> where
A: Array,
<A as Array>::Item: Display,
A: Array,
<A as Array>::Item: Display,
impl<A> Display for ArrayVec<A> where
A: Array,
<A as Array>::Item: Display,
A: Array,
<A as Array>::Item: Display,
impl Display for OggReadError
impl Display for Error
impl Display for Error
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impl Display for FileTime
Loading content...Implementors
impl Display for ErrorKind
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impl Display for BernoulliError
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impl Display for WeightedError
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impl Display for Level
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impl Display for LevelFilter
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impl Display for Value
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pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>
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Display a JSON value as a string.
let json = json!({ "city": "London", "street": "10 Downing Street" }); // Compact format: // // {"city":"London","street":"10 Downing Street"} let compact = format!("{}", json); assert_eq!(compact, "{\"city\":\"London\",\"street\":\"10 Downing Street\"}"); // Pretty format: // // { // "city": "London", // "street": "10 Downing Street" // } let pretty = format!("{:#}", json); assert_eq!(pretty, "{\n \"city\": \"London\",\n \"street\": \"10 Downing Street\"\n}");
impl Display for Shell
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impl Display for geng::prelude::anyhow::Error
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impl Display for geng::prelude::futures::channel::mpsc::SendError
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impl Display for geng::prelude::futures::channel::mpsc::TryRecvError
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impl Display for Canceled
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impl Display for EnterError
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impl Display for Aborted
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impl Display for geng::prelude::futures::io::Error
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impl Display for SpawnError
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impl Display for ParseLevelError
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impl Display for SetLoggerError
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impl Display for ReadError
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impl Display for geng::prelude::rand::Error
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impl Display for geng::prelude::serde::de::value::Error
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impl Display for geng::prelude::serde_json::Error
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impl Display for Number
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impl Display for geng::prelude::structopt::clap::Error
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impl<'_, T> Display for Ref<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<'_, T> Display for RefMut<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<'a> Display for Unexpected<'a>
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impl<'a> Display for dyn Expected + 'a
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impl<'n, 'e> Display for App<'n, 'e>
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impl<P> Display for Pin<P> where
P: Display,
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P: Display,
impl<T> Display for geng::prelude::futures::channel::mpsc::TrySendError<T>
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impl<T> Display for geng::prelude::futures::io::ReuniteError<T>
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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 Color<T> where
T: ColorComponent,
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T: ColorComponent,
impl<T> Display for Rc<T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T> Display for RealImpl<T> where
T: Float,
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T: Float,
impl<T> Display for Vec2<T> where
T: Display,
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T: Display,
impl<T> Display for Vec3<T> where
T: Display,
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T: Display,
impl<T> Display for Vec4<T> where
T: Display,
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T: Display,