Trait scale_info::prelude::fmt::Display

pub trait Display {
    pub 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

pub 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 Ipv6Addr

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

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

impl Display for SocketAddrV6

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

impl Display for FromBytesWithNulError

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

impl<T> Display for TryLockError<T>

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

impl<T> Display for SendError<T>

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

impl Display for AccessError

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

impl Display for Ipv4Addr

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

impl Display for IntoStringError

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

impl Display for SocketAddr

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

impl Display for IpAddr

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

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

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

impl Display for RecvTimeoutError

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

impl Display for NulError

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

impl Display for JoinPathsError

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

impl Display for TryRecvError

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

impl<T> Display for PoisonError<T>

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

impl Display for FromVecWithNulError

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

impl Display for Backtrace

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

impl<T> Display for TrySendError<T>

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

impl<W> Display for IntoInnerError<W>

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

impl Display for StripPrefixError

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

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

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

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

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

impl Display for SocketAddrV4

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

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

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

impl Display for SystemTimeError

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

impl Display for ExitStatus

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

impl Display for Error

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

impl Display for RecvError

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

impl Display for VarError

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

impl Display for AddrParseError

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

impl Display for CharTryFromError

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

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

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

impl Display for u128

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

impl Display for ParseBoolError

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

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

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

impl<'a> Display for EscapeDebug<'a>

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

impl Display for !

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

impl Display for BorrowMutError

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

impl Display for Utf8Error

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

impl Display for i16

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

impl Display for EscapeUnicode

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

impl Display for str

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

impl Display for BorrowError

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

impl Display for EscapeDefault

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

impl Display for i64

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

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

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

impl Display for Infallible

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

impl Display for LayoutError

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

impl Display for u32

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

impl Display for char

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

impl Display for Utf8Lossy

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

impl Display for i8

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

impl Display for i32

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

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

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

impl Display for TryFromSliceError

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

impl Display for usize

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

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

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

impl<'a> Display for EscapeUnicode<'a>

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

impl Display for isize

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

impl Display for f64

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

impl Display for u64

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

impl Display for u16

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

impl Display for u8

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

impl Display for ToUppercase

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

impl Display for ToLowercase

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

impl Display for ParseCharError

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

impl Display for bool

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

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

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

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

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

impl Display for EscapeDebug

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

impl Display for i128

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

impl Display for DecodeUtf16Error

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

impl Display for EscapeDefault

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

impl<'a> Display for EscapeDefault<'a>

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

impl Display for f32

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

impl Display for AllocError

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

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

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

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

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

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

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

impl Display for Error

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

impl<T> Display for CapacityError<T>

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

impl<A> Display for ArrayString<A> where
    A: Array<Item = u8> + Copy, 

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

impl Display for Error

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

impl<'a> Display for Unexpected<'a>

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

impl Display for Error

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

impl<'a> Display for dyn Expected + 'a

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

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Implementors

impl Display for TryReserveError

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

impl Display for scale_info::prelude::fmt::Error

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

impl Display for NonZeroI8

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

impl Display for NonZeroI16

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

impl Display for NonZeroI32

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

impl Display for NonZeroI64

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

impl Display for NonZeroI128

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

impl Display for NonZeroIsize

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

impl Display for NonZeroU8

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

impl Display for NonZeroU16

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

impl Display for NonZeroU32

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

impl Display for NonZeroU64

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

impl Display for NonZeroU128

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

impl Display for NonZeroUsize

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

impl Display for ParseFloatError

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

impl Display for ParseIntError

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

impl Display for TryFromIntError

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

impl Display for FromUtf8Error

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

impl Display for FromUtf16Error

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

impl Display for String

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

impl Display for Path<PortableForm>

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

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

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

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

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

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

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

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