Trait std::fmt::Display

1.0.0 · source ·
pub trait Display {
    // Required method
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>;
}
Expand description

Format trait for an empty format, {}.

Implementing this trait for a type will automatically implement the ToString trait for the type, allowing the usage of the .to_string() method. Prefer implementing the Display trait for a type, rather than ToString.

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)");
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Required Methods§

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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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impl Display for AsciiChar

1.34.0 · source§

impl Display for Infallible

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impl Display for VarError

1.60.0 · source§

impl Display for ErrorKind

1.7.0 · source§

impl Display for IpAddr

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impl Display for SocketAddr

1.15.0 · source§

impl Display for RecvTimeoutError

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impl Display for TryRecvError

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impl Display for gimli::read::Error

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impl Display for bool

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impl Display for char

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impl Display for f32

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impl Display for f64

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impl Display for i8

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impl Display for i16

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impl Display for i32

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impl Display for i64

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impl Display for i128

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impl Display for isize

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impl Display for !

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impl Display for str

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impl Display for u8

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impl Display for u16

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impl Display for u32

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impl Display for u64

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impl Display for u128

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impl Display for usize

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impl Display for AllocError

1.28.0 · source§

impl Display for LayoutError

1.36.0 · source§

impl Display for TryFromSliceError

1.39.0 · source§

impl Display for std::ascii::EscapeDefault

1.65.0 · source§

impl Display for Backtrace

1.13.0 · source§

impl Display for BorrowError

1.13.0 · source§

impl Display for BorrowMutError

1.34.0 · source§

impl Display for CharTryFromError

1.9.0 · source§

impl Display for DecodeUtf16Error

1.20.0 · source§

impl Display for std::char::EscapeDebug

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impl Display for std::char::EscapeDefault

1.16.0 · source§

impl Display for std::char::EscapeUnicode

1.20.0 · source§

impl Display for ParseCharError

1.16.0 · source§

impl Display for ToLowercase

1.16.0 · source§

impl Display for ToUppercase

1.59.0 · source§

impl Display for TryFromCharError

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impl Display for UnorderedKeyError

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impl Display for TryReserveError

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impl Display for JoinPathsError

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impl Display for std::ffi::os_str::Display<'_>

1.69.0 · source§

impl Display for FromBytesUntilNulError

1.17.0 · source§

impl Display for FromBytesWithNulError

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impl Display for FromVecWithNulError

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impl Display for IntoStringError

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impl Display for NulError

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impl Display for std::io::Error

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impl Display for WriterPanicked

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impl Display for AddrParseError

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impl Display for Ipv4Addr

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impl Display for Ipv6Addr

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

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impl Display for SocketAddrV4

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impl Display for SocketAddrV6

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impl Display for ParseFloatError

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impl Display for ParseIntError

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impl Display for TryFromIntError

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impl Display for InvalidHandleError

Available on Windows only.
1.63.0 · source§

impl Display for NullHandleError

Available on Windows only.
1.26.0 · source§

impl Display for Location<'_>

1.26.0 · source§

impl Display for PanicInfo<'_>

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impl Display for std::path::Display<'_>

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impl Display for StripPrefixError

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impl Display for ExitStatus

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impl Display for ExitStatusError

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impl Display for ParseBoolError

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impl Display for Utf8Error

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impl Display for FromUtf8Error

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impl Display for FromUtf16Error

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impl Display for String

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impl Display for RecvError

1.26.0 · source§

impl Display for AccessError

1.8.0 · source§

impl Display for SystemTimeError

1.66.0 · source§

impl Display for TryFromFloatSecsError

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impl Display for DwAccess

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impl Display for DwAddr

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impl Display for DwAt

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impl Display for DwAte

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impl Display for DwCc

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impl Display for DwCfa

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impl Display for DwChildren

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impl Display for DwDefaulted

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impl Display for DwDs

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impl Display for DwDsc

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impl Display for DwEhPe

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impl Display for DwEnd

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impl Display for DwForm

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impl Display for DwId

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impl Display for DwIdx

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impl Display for DwInl

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impl Display for DwLang

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impl Display for DwLle

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impl Display for DwLnct

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impl Display for DwLne

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impl Display for DwLns

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impl Display for DwMacro

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impl Display for DwOp

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impl Display for DwOrd

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impl Display for DwRle

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impl Display for DwSect

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impl Display for DwSectV2

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impl Display for DwTag

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impl Display for DwUt

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impl Display for DwVirtuality

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impl Display for DwVis

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impl Display for Arguments<'_>

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impl Display for std::fmt::Error

1.60.0 · source§

impl<'a> Display for EscapeAscii<'a>

1.34.0 · source§

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

1.34.0 · source§

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

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

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impl<'a, K, V, A> Display for std::collections::btree_map::OccupiedError<'a, K, V, A>
where K: Debug + Ord, V: Debug, A: Allocator + Clone,

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impl<'a, K: Debug, V: Debug> Display for std::collections::hash_map::OccupiedError<'a, K, V>

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

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impl<E> Display for Report<E>
where E: Error,

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impl<F> Display for FormatterFn<F>
where F: Fn(&mut Formatter<'_>) -> Result<(), Error>,

1.33.0 · source§

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

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

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impl<T> Display for TryLockError<T>

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impl<T> Display for TrySendError<T>

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

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

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

1.20.0 · source§

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

1.20.0 · source§

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

1.28.0 · source§

impl<T> Display for NonZero<T>

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

1.10.0 · source§

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

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impl<T> Display for SendError<T>

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impl<T> Display for PoisonError<T>

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

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

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

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

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

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

1.20.0 · source§

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

1.20.0 · source§

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

1.20.0 · source§

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

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impl<W> Display for IntoInnerError<W>

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impl<const N: usize> Display for GetManyMutError<N>