Trait std::fmt::Display

1.0.0 · source ·

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

Expand description

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, }));

Implementors

1.34.0 · source

impl Display for Infallible

impl Display for VarError

1.60.0 · source

impl Display for ErrorKind

1.7.0 · source

impl Display for IpAddr

impl Display for SocketAddr

1.15.0 · source

impl Display for RecvTimeoutError

impl Display for TryRecvError

impl Display for bool

impl Display for char

impl Display for f32

impl Display for f64

impl Display for i8

impl Display for i16

impl Display for i32

impl Display for i64

impl Display for i128

impl Display for isize

impl Display for !

impl Display for str

impl Display for u8

impl Display for u16

impl Display for u32

impl Display for u64

impl Display for u128

impl Display for usize

impl Display for FromBytesUntilNulError

impl Display for Utf8Lossy

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

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

1.16.0 · source

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

1.57.0 · source

impl Display for TryReserveError

impl Display for JoinPathsError

impl Display for Report<Box<dyn Error>>

1.17.0 · source

impl Display for FromBytesWithNulError

1.58.0 · source

impl Display for FromVecWithNulError

1.7.0 · source

impl Display for IntoStringError

impl Display for NulError

impl Display for std::io::Error

1.56.0 · source

impl Display for WriterPanicked

1.4.0 · source

impl Display for AddrParseError

impl Display for Ipv4Addr

impl Display for Ipv6Addr

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

impl Display for SocketAddrV4

impl Display for SocketAddrV6

1.34.0 · source

impl Display for NonZeroI8

1.34.0 · source

impl Display for NonZeroI16

1.34.0 · source

impl Display for NonZeroI32

1.34.0 · source

impl Display for NonZeroI64

1.34.0 · source

impl Display for NonZeroI128

1.34.0 · source

impl Display for NonZeroIsize

1.28.0 · source

impl Display for NonZeroU8

1.28.0 · source

impl Display for NonZeroU16

1.28.0 · source

impl Display for NonZeroU32

1.28.0 · source

impl Display for NonZeroU64

1.28.0 · source

impl Display for NonZeroU128

1.28.0 · source

impl Display for NonZeroUsize

impl Display for ParseFloatError

impl Display for ParseIntError

1.34.0 · source

impl Display for TryFromIntError

1.63.0 · source

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<'_>

impl Display for Display<'_>

1.7.0 · source

impl Display for StripPrefixError

impl Display for ExitStatus

impl Display for ExitStatusError

impl Display for ParseBoolError

impl Display for Utf8Error

impl Display for FromUtf8Error

impl Display for FromUtf16Error

impl Display for String

impl Display for RecvError

1.26.0 · source

impl Display for AccessError

impl Display for FromFloatSecsError

1.8.0 · source

impl Display for SystemTimeError

impl Display for Arguments<'_>

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>

1.34.0 · source

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

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,

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

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

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

1.33.0 · source

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

impl<T> Display for TryLockError<T>

impl<T> Display for TrySendError<T>

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

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

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,

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

1.10.0 · source

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

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

impl<T> Display for SendError<T>

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

impl<T> Display for PoisonError<T>

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

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>

impl<W> Display for IntoInnerError<W>