1.0.0[][src]Trait geng::prelude::Display

pub trait Display {
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>;
}

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, }));
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Implementations on Foreign Types

impl Display for IpAddr[src]

impl Display for FromVecWithNulError[src]

impl Display for FromBytesWithNulError[src]

impl<T> Display for SendError<T>[src]

impl<W> Display for IntoInnerError<W>[src]

impl Display for NulError[src]

impl Display for StripPrefixError[src]

impl Display for VarError[src]

impl Display for SystemTimeError[src]

impl Display for Ipv4Addr[src]

impl Display for RecvTimeoutError[src]

impl Display for AccessError[src]

impl<'_, T> Display for RwLockReadGuard<'_, T> where
    T: Display + ?Sized
[src]

impl Display for Backtrace[src]

impl Display for AddrParseError[src]

impl Display for IntoStringError[src]

impl<'_> Display for Display<'_>[src]

impl Display for TryRecvError[src]

impl Display for SocketAddr[src]

impl<T> Display for PoisonError<T>[src]

impl Display for SocketAddrV6[src]

impl<'_, T> Display for RwLockWriteGuard<'_, T> where
    T: Display + ?Sized
[src]

impl Display for ExitStatus[src]

impl Display for JoinPathsError[src]

impl<T> Display for TryLockError<T>[src]

impl Display for RecvError[src]

impl<T> Display for TrySendError<T>[src]

impl Display for Ipv6Addr[src]

Write an Ipv6Addr, conforming to the canonical style described by RFC 5952.

impl Display for SocketAddrV4[src]

impl<'_, T> Display for MutexGuard<'_, T> where
    T: Display + ?Sized
[src]

impl Display for NonZeroU16[src]

impl Display for NonZeroI8[src]

impl Display for i8[src]

impl Display for Utf8Error[src]

impl<'_, T> Display for &'_ T where
    T: Display + ?Sized
[src]

impl Display for EscapeUnicode[src]

impl Display for i128[src]

impl<'_> Display for Location<'_>[src]

impl Display for NonZeroI32[src]

impl Display for ParseIntError[src]

impl Display for i32[src]

impl Display for Utf8Lossy[src]

impl Display for NonZeroI128[src]

impl<T> Display for Wrapping<T> where
    T: Display
[src]

impl Display for BorrowMutError[src]

impl Display for CharTryFromError[src]

impl Display for u8[src]

impl Display for char[src]

impl Display for ![src]

impl Display for i64[src]

impl<'a> Display for EscapeDefault<'a>[src]

impl Display for ParseCharError[src]

impl Display for ToLowercase[src]

impl Display for NonZeroI64[src]

impl Display for isize[src]

impl Display for u64[src]

impl Display for NonZeroI16[src]

impl Display for EscapeDebug[src]

impl Display for usize[src]

impl Display for NonZeroU32[src]

impl Display for f64[src]

impl Display for bool[src]

impl Display for u16[src]

impl Display for NonZeroUsize[src]

impl<'a> Display for EscapeUnicode<'a>[src]

impl Display for BorrowError[src]

impl Display for LayoutError[src]

impl Display for ParseFloatError[src]

impl Display for str[src]

impl Display for u32[src]

impl Display for ToUppercase[src]

impl Display for EscapeDefault[src]

impl Display for ParseBoolError[src]

impl Display for Infallible[src]

impl Display for EscapeDefault[src]

impl Display for u128[src]

impl Display for NonZeroU64[src]

impl<'_> Display for PanicInfo<'_>[src]

impl Display for f32[src]

impl<'a> Display for EscapeDebug<'a>[src]

impl<'_> Display for Arguments<'_>[src]

impl Display for NonZeroU8[src]

impl Display for NonZeroIsize[src]

impl Display for TryFromSliceError[src]

impl Display for DecodeUtf16Error[src]

impl Display for Error[src]

impl Display for AllocError[src]

impl Display for NonZeroU128[src]

impl<'_, T> Display for &'_ mut T where
    T: Display + ?Sized
[src]

impl Display for TryFromIntError[src]

impl Display for i16[src]

impl<'_, B> Display for Cow<'_, B> where
    B: Display + ToOwned + ?Sized,
    <B as ToOwned>::Owned: Display
[src]

impl Display for FromUtf8Error[src]

impl Display for String[src]

impl Display for TryReserveError[src]

impl<T, A> Display for Box<T, A> where
    A: AllocRef,
    T: Display + ?Sized
[src]

impl Display for FromUtf16Error[src]

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[src]

impl<'a> Display for SymbolName<'a>[src]

impl<'a> Display for BytesOrWideString<'a>[src]

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>, 

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[src]

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[src]

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[src]

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[src]

impl Display for RoundingError[src]

impl Display for ParseError[src]

impl Display for Utc[src]

impl<Tz> Display for Date<Tz> where
    Tz: TimeZone,
    <Tz as TimeZone>::Offset: Display
[src]

impl<'a, I, B> Display for DelayedFormat<I> where
    B: Borrow<Item<'a>>,
    I: Clone + Iterator<Item = B>, 
[src]

impl<Tz> Display for DateTime<Tz> where
    Tz: TimeZone,
    <Tz as TimeZone>::Offset: Display
[src]

impl Display for Weekday[src]

impl Display for OutOfRangeError[src]

impl Display for Duration[src]

impl<'a> Display for TmFmt<'a>[src]

impl Display for ParseError[src]

impl Display for SteadyTime[src]

impl Display for ParseFloatError[src]

impl Display for ParseColorError

impl Display for ShaderCompilationError[src]

impl Display for ProgramLinkError[src]

impl<Enum> Display for TryFromPrimitiveError<Enum> where
    Enum: TryFromPrimitive, 

impl Display for ContextError[src]

impl Display for CreationError[src]

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

impl<'a, R, T> Display for MappedRwLockWriteGuard<'a, R, T> where
    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

impl<'a, R, G, T> Display for MappedReentrantMutexGuard<'a, R, G, T> where
    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

impl<'a, R, T> Display for RwLockUpgradableReadGuard<'a, R, T> where
    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

impl<'a, R, T> Display for MappedRwLockReadGuard<'a, R, T> where
    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

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

impl Display for CacheReadErr[src]

impl Display for CacheWriteErr[src]

impl Display for Tag[src]

impl<'a, T> Display for ShardedLockReadGuard<'a, T> where
    T: Display + ?Sized

impl<'a, T> Display for ShardedLockWriteGuard<'a, T> where
    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, 

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[src]

impl Display for ParameterError[src]

impl Display for Error[src]

impl Display for EncodingError[src]

impl Display for LimitError[src]

impl Display for ImageError[src]

impl Display for UnsupportedError[src]

impl Display for ImageFormatHint[src]

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
[src]

impl Display for ThreadPoolBuildError[src]

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

impl<'_, T> Display for ShardedLockReadGuard<'_, T> where
    T: Display + ?Sized

impl Display for LzwError

impl Display for EncodingError

impl Display for DecodingError

impl Display for DecodingFormatError

impl Display for ParseRatioError[src]

impl<T> Display for Ratio<T> where
    T: Clone + Display + Integer
[src]

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[src]

impl Display for Frame[src]

impl Display for OpCode[src]

impl Display for Response[src]

impl Display for Request[src]

impl Display for Message[src]

impl Display for Error[src]

impl Display for InvalidChunkSize[src]

impl Display for InvalidOutputSize

impl Display for ParseError[src]

impl<S> Display for Host<S> where
    S: AsRef<str>, 
[src]

impl Display for Url[src]

Display the serialization of this URL.

impl Display for SyntaxViolation[src]

impl<I> Display for Recompositions<I> where
    I: Clone + Iterator<Item = char>, 

impl<I> Display for Decompositions<I> where
    I: Clone + Iterator<Item = char>, 

impl<'s, T> Display for SliceVec<'s, T> where
    T: Display

impl<A> Display for TinyVec<A> where
    A: Array,
    <A as Array>::Item: Display

impl<A> Display for ArrayVec<A> where
    A: Array,
    <A as Array>::Item: Display

impl Display for PlayError[src]

impl Display for DecoderError[src]

impl Display for StreamError[src]

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

impl<A> Display for ArrayVec<A> where
    A: Array,
    <A as Array>::Item: Display

impl Display for OggReadError

impl Display for Error

impl Display for Error[src]

impl Display for FileTime

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Implementors

impl Display for ErrorKind[src]

impl Display for BernoulliError[src]

impl Display for WeightedError[src]

impl Display for Level[src]

impl Display for LevelFilter[src]

impl Display for Value[src]

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

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[src]

impl Display for geng::prelude::anyhow::Error[src]

impl Display for geng::prelude::futures::channel::mpsc::SendError[src]

impl Display for geng::prelude::futures::channel::mpsc::TryRecvError[src]

impl Display for Canceled[src]

impl Display for EnterError[src]

impl Display for Aborted[src]

impl Display for geng::prelude::futures::io::Error[src]

impl Display for SpawnError[src]

impl Display for ParseLevelError[src]

impl Display for SetLoggerError[src]

impl Display for ReadError[src]

impl Display for geng::prelude::rand::Error[src]

impl Display for geng::prelude::serde::de::value::Error[src]

impl Display for geng::prelude::serde_json::Error[src]

impl Display for Number[src]

impl Display for geng::prelude::structopt::clap::Error[src]

impl<'_, T> Display for Ref<'_, T> where
    T: Display + ?Sized
[src]

impl<'_, T> Display for RefMut<'_, T> where
    T: Display + ?Sized
[src]

impl<'a> Display for Unexpected<'a>[src]

impl<'a> Display for dyn Expected + 'a[src]

impl<'n, 'e> Display for App<'n, 'e>[src]

impl<P> Display for Pin<P> where
    P: Display
[src]

impl<T> Display for geng::prelude::futures::channel::mpsc::TrySendError<T>[src]

impl<T> Display for geng::prelude::futures::io::ReuniteError<T>[src]

impl<T> Display for Arc<T> where
    T: Display + ?Sized
[src]

impl<T> Display for Color<T> where
    T: ColorComponent
[src]

impl<T> Display for Rc<T> where
    T: Display + ?Sized
[src]

impl<T> Display for RealImpl<T> where
    T: Float
[src]

impl<T> Display for Vec2<T> where
    T: Display
[src]

impl<T> Display for Vec3<T> where
    T: Display
[src]

impl<T> Display for Vec4<T> where
    T: Display
[src]

impl<T, Item> Display for geng::prelude::futures::prelude::stream::ReuniteError<T, Item>[src]

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