Trait rustc_std_workspace_alloc::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)");

Required Methods§

source

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§

source§

impl Display for AsciiChar

1.34.0 · source§

impl Display for Infallible

1.7.0 · source§

impl Display for IpAddr

source§

impl Display for SocketAddr

source§

impl Display for bool

source§

impl Display for char

source§

impl Display for f32

source§

impl Display for f64

source§

impl Display for i8

source§

impl Display for i16

source§

impl Display for i32

source§

impl Display for i64

source§

impl Display for i128

source§

impl Display for isize

source§

impl Display for !

source§

impl Display for str

source§

impl Display for u8

source§

impl Display for u16

source§

impl Display for u32

source§

impl Display for u64

source§

impl Display for u128

source§

impl Display for usize

1.36.0 · source§

impl Display for TryFromSliceError

1.39.0 · source§

impl Display for core::ascii::EscapeDefault

1.13.0 · source§

impl Display for BorrowError

1.13.0 · source§

impl Display for BorrowMutError

1.34.0 · source§

impl Display for CharTryFromError

1.20.0 · source§

impl Display for ParseCharError

1.9.0 · source§

impl Display for DecodeUtf16Error

1.20.0 · source§

impl Display for core::char::EscapeDebug

1.16.0 · source§

impl Display for core::char::EscapeDefault

1.16.0 · source§

impl Display for core::char::EscapeUnicode

1.16.0 · source§

impl Display for ToLowercase

1.16.0 · source§

impl Display for ToUppercase

1.59.0 · source§

impl Display for TryFromCharError

1.69.0 · source§

impl Display for FromBytesUntilNulError

1.17.0 · source§

impl Display for FromBytesWithNulError

source§

impl Display for Ipv4Addr

source§

impl Display for Ipv6Addr

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

1.4.0 · source§

impl Display for AddrParseError

source§

impl Display for SocketAddrV4

source§

impl Display for SocketAddrV6

source§

impl Display for ParseFloatError

source§

impl Display for ParseIntError

1.34.0 · source§

impl Display for TryFromIntError

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

1.26.0 · source§

impl Display for Location<'_>

1.26.0 · source§

impl Display for PanicInfo<'_>

1.66.0 · source§

impl Display for TryFromFloatSecsError

source§

impl Display for AllocError

1.28.0 · source§

impl Display for LayoutError

1.57.0 · source§

impl Display for TryReserveError

1.58.0 · source§

impl Display for FromVecWithNulError

1.7.0 · source§

impl Display for IntoStringError

source§

impl Display for NulError

source§

impl Display for ParseBoolError

source§

impl Display for Utf8Error

source§

impl Display for FromUtf8Error

source§

impl Display for FromUtf16Error

source§

impl Display for String

source§

impl Display for Arguments<'_>

source§

impl Display for Error

1.60.0 · source§

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

1.34.0 · source§

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

1.34.0 · source§

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

1.34.0 · source§

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

source§

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

source§

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

1.33.0 · source§

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

source§

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

source§

impl<T> Display for &mut Twhere 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,

source§

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

1.10.0 · source§

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

source§

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

source§

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

source§

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

source§

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

source§

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