Trait sp_std::fmt::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 Error

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

impl Display for Backtrace

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

impl Display for IntoStringError

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

impl Display for NulError

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

impl Display for SocketAddrV4

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

impl<W> Display for IntoInnerError<W>

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

impl Display for JoinPathsError

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

impl Display for ExitStatus

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

impl Display for VarError

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

impl Display for IpAddr

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

impl Display for FromBytesWithNulError

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

impl Display for Ipv4Addr

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

impl Display for AccessError

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

impl Display for Ipv6Addr

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

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

impl Display for SocketAddr

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

impl<'_> Display for Display<'_>

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

impl Display for SocketAddrV6

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

impl Display for StripPrefixError

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

impl Display for SystemTimeError

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

impl Display for AddrParseError

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

impl Display for FromVecWithNulError

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

impl Display for f32

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

impl Display for CharTryFromError

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

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

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

impl Display for !

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

impl Display for u128

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

impl Display for ParseCharError

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

impl Display for usize

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

impl Display for u32

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

impl Display for EscapeDebug

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

impl Display for DecodeUtf16Error

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

impl Display for Utf8Lossy

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

impl Display for TryFromSliceError

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

impl Display for f64

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

impl<P> Display for Pin<P> where
    P: Display, 

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

impl Display for i32

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

impl Display for i64

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

impl<'_> Display for Location<'_>

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

impl Display for EscapeDefault

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

impl Display for i128

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

impl Display for i16

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

impl<'_> Display for PanicInfo<'_>

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

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

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

impl Display for i8

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

impl Display for isize

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

impl Display for ToLowercase

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

impl Display for ToUppercase

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

impl Display for str

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

impl Display for u8

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

impl Display for u16

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

impl Display for EscapeUnicode

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

impl Display for u64

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

impl Display for char

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

impl Display for EscapeDefault

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

impl Display for bool

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

impl Display for String

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

impl Display for TryReserveError

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

impl Display for FromUtf8Error

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

impl Display for FromUtf16Error

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

impl<'a> Display for Demangle<'a>

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

impl Display for DwRle

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

impl Display for DwOp

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

impl Display for DwLne

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

impl Display for DwAccess

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

impl Display for DwCfa

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

impl Display for DwLns

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

impl Display for DwEnd

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

impl Display for DwUt

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

impl Display for DwCc

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

impl Display for DwDs

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

impl Display for DwId

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

impl Display for DwVis

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

impl Display for DwDefaulted

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

impl Display for DwOrd

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

impl Display for DwMacro

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

impl Display for DwChildren

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

impl<R, Offset> Display for LineInstruction<R, Offset> where
    Offset: ReaderOffset,
    R: Reader<Offset = Offset>, 

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

impl Display for DwInl

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

impl Display for DwForm

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

impl Display for DwVirtuality

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

impl Display for DwEhPe

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

impl Display for DwTag

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

impl Display for DwAt

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

impl Display for DwAddr

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

impl Display for DwLnct

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

impl Display for DwIdx

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

impl Display for DwDsc

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

impl Display for Error

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

impl Display for DwLle

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

impl Display for DwAte

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

impl Display for DwLang

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

impl Display for Error

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

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Implementors

impl Display for Infallible

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

impl Display for RecvTimeoutError

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

impl Display for TryRecvError

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

impl Display for AllocErr

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

impl Display for LayoutErr

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

impl Display for BorrowError

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

impl Display for BorrowMutError

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

impl Display for sp_std::fmt::Error

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

impl Display for NonZeroI8

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

impl Display for NonZeroI16

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

impl Display for NonZeroI32

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

impl Display for NonZeroI64

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

impl Display for NonZeroI128

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

impl Display for NonZeroIsize

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

impl Display for NonZeroU8

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

impl Display for NonZeroU16

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

impl Display for NonZeroU32

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

impl Display for NonZeroU64

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

impl Display for NonZeroU128

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

impl Display for NonZeroUsize

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

impl Display for ParseFloatError

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

impl Display for ParseIntError

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

impl Display for TryFromIntError

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

impl Display for ParseBoolError

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

impl Display for Utf8Error

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

impl Display for RecvError

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

impl<'_> Display for Arguments<'_>

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

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

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

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

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

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

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

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

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

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

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

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

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

impl<'a> Display for sp_std::str::EscapeDebug<'a>

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

impl<'a> Display for sp_std::str::EscapeDefault<'a>

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

impl<'a> Display for sp_std::str::EscapeUnicode<'a>

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

impl<T> Display for TryLockError<T>

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

impl<T> Display for TrySendError<T>

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

impl<T> Display for Wrapping<T> where
    T: Display, 

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

impl<T> Display for Box<T> where
    T: Display + ?Sized, 

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

impl<T> Display for Rc<T> where
    T: Display + ?Sized, 

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

impl<T> Display for SendError<T>

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

impl<T> Display for Arc<T> where
    T: Display + ?Sized, 

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

impl<T> Display for PoisonError<T>

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

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