1.0.0[][src]Trait frame_support::dispatch::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<'_, T> Display for RwLockReadGuard<'_, T> where
    T: Display + ?Sized
[src]

impl<T> Display for PoisonError<T>[src]

impl Display for Error[src]

impl Display for Backtrace[src]

impl<T> Display for TrySendError<T>[src]

impl Display for RecvTimeoutError[src]

impl Display for IntoStringError[src]

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

impl<T> Display for TryLockError<T>[src]

impl Display for NulError[src]

impl Display for SocketAddrV4[src]

impl Display for TryRecvError[src]

impl<W> Display for IntoInnerError<W>[src]

impl Display for JoinPathsError[src]

impl Display for ExitStatus[src]

impl Display for VarError[src]

impl<T> Display for SendError<T>[src]

impl Display for IpAddr[src]

impl Display for FromBytesWithNulError[src]

impl Display for Ipv4Addr[src]

impl Display for AccessError[src]

impl Display for Ipv6Addr[src]

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

impl Display for SocketAddr[src]

impl<'_> Display for Display<'_>[src]

impl Display for SocketAddrV6[src]

impl Display for StripPrefixError[src]

impl Display for SystemTimeError[src]

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

impl Display for AddrParseError[src]

impl Display for RecvError[src]

impl Display for FromVecWithNulError[src]

impl Display for ParseIntError[src]

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

impl Display for f32[src]

impl Display for NonZeroI64[src]

impl Display for CharTryFromError[src]

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

impl Display for ![src]

impl Display for LayoutErr[src]

impl Display for u128[src]

impl Display for ParseCharError[src]

impl Display for NonZeroU128[src]

impl Display for usize[src]

impl Display for u32[src]

impl Display for EscapeDebug[src]

impl Display for ParseFloatError[src]

impl Display for ParseBoolError[src]

impl Display for DecodeUtf16Error[src]

impl Display for Utf8Lossy[src]

impl Display for AllocErr[src]

impl Display for TryFromSliceError[src]

impl Display for BorrowMutError[src]

impl Display for NonZeroI16[src]

impl Display for f64[src]

impl Display for NonZeroI8[src]

impl<P> Display for Pin<P> where
    P: Display
[src]

impl Display for NonZeroU32[src]

impl Display for i32[src]

impl<'a> Display for EscapeDefault<'a>[src]

impl Display for Infallible[src]

impl Display for i64[src]

impl Display for NonZeroI128[src]

impl Display for TryFromIntError[src]

impl<T> Display for Wrapping<T> where
    T: Display
[src]

impl Display for NonZeroU8[src]

impl Display for Utf8Error[src]

impl<'_> Display for Location<'_>[src]

impl Display for EscapeDefault[src]

impl Display for i128[src]

impl Display for i16[src]

impl Display for NonZeroI32[src]

impl<'_> Display for PanicInfo<'_>[src]

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

impl Display for i8[src]

impl Display for isize[src]

impl<'a> Display for EscapeDebug<'a>[src]

impl Display for ToLowercase[src]

impl Display for ToUppercase[src]

impl Display for str[src]

impl Display for u8[src]

impl Display for BorrowError[src]

impl Display for u16[src]

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

impl Display for EscapeUnicode[src]

impl Display for u64[src]

impl Display for NonZeroUsize[src]

impl Display for char[src]

impl Display for NonZeroU16[src]

impl Display for EscapeDefault[src]

impl Display for NonZeroIsize[src]

impl Display for NonZeroU64[src]

impl Display for bool[src]

impl<'a> Display for EscapeUnicode<'a>[src]

impl Display for String[src]

impl<T> Display for Rc<T> where
    T: Display + ?Sized
[src]

impl Display for TryReserveError[src]

impl Display for FromUtf8Error[src]

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

impl<T> Display for Box<T> where
    T: Display + ?Sized
[src]

impl Display for FromUtf16Error[src]

impl<T> Display for Arc<T> where
    T: Display + ?Sized
[src]

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

impl Display for DwRle

impl Display for DwOp

impl Display for DwLne

impl Display for DwAccess

impl Display for DwCfa

impl Display for DwLns

impl Display for DwEnd

impl Display for DwUt

impl Display for DwCc

impl Display for DwDs

impl Display for DwId

impl Display for DwVis

impl Display for DwDefaulted

impl Display for DwOrd

impl Display for DwMacro

impl Display for DwChildren

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

impl Display for DwInl

impl Display for DwForm

impl Display for DwVirtuality

impl Display for DwEhPe

impl Display for DwTag

impl Display for DwAt

impl Display for DwAddr

impl Display for DwLnct

impl Display for DwIdx

impl Display for DwDsc

impl Display for Error

impl Display for DwLle

impl Display for DwAte

impl Display for DwLang

impl Display for Error

impl Display for Level[src]

impl Display for Field[src]

impl Display for ParseLevelFilterError[src]

impl Display for SetGlobalDefaultError[src]

impl<T> Display for DisplayValue<T> where
    T: Display
[src]

impl Display for dyn Value + 'static[src]

impl Display for ParseLevelError[src]

impl Display for FieldSet[src]

impl<'a> Display for ValueSet<'a>[src]

impl Display for LevelFilter[src]

impl Display for ParseLevelError[src]

impl Display for SetLoggerError[src]

impl Display for Level[src]

impl Display for LevelFilter[src]

impl<'a> Display for dyn Expected + 'a[src]

impl Display for Error[src]

impl<'a> Display for Unexpected<'a>[src]

impl Display for CodeNotFound[src]

impl Display for AccountId32[src]

impl Display for Error[src]

impl Display for Public[src]

impl Display for Public[src]

impl Display for CryptoTypePublicPair[src]

impl Display for Ss58AddressFormat[src]

impl<'a> Display for HexDisplay<'a>[src]

impl Display for ParseError[src]

impl Display for Public[src]

impl Display for Error[src]

impl<A> Display for ArrayString<A> where
    A: Array<Item = u8> + Copy
[src]

impl<T> Display for CapacityError<T>[src]

impl Display for Error

impl<A> Display for ArrayString<A> where
    A: Array<Item = u8>, 
[src]

impl<T> Display for CapacityError<T>[src]

impl Display for InvalidOutputSize

impl Display for WeightedError[src]

impl Display for ReadError[src]

impl Display for BernoulliError[src]

impl Display for Error[src]

impl Display for Error[src]

impl<'a, R, G, T> Display for MappedReentrantMutexGuard<'a, R, G, T> where
    G: 'a + GetThreadId,
    R: 'a + RawMutex,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for MappedRwLockWriteGuard<'a, R, T> where
    R: 'a + RawRwLock,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for RwLockUpgradableReadGuard<'a, R, T> where
    R: 'a + RawRwLockUpgrade,
    T: 'a + Display + ?Sized

impl<'a, R, G, T> Display for ReentrantMutexGuard<'a, R, G, T> where
    G: 'a + GetThreadId,
    R: 'a + RawMutex,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for MutexGuard<'a, R, T> where
    R: 'a + RawMutex,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for RwLockWriteGuard<'a, R, T> where
    R: 'a + RawRwLock,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for MappedMutexGuard<'a, R, T> where
    R: 'a + RawMutex,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for RwLockReadGuard<'a, R, T> where
    R: 'a + RawRwLock,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for MappedRwLockReadGuard<'a, R, T> where
    R: 'a + RawRwLock,
    T: 'a + Display + ?Sized

impl Display for Error

impl Display for Regex

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

Shows the original regular expression.

impl Display for Regex

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

Shows the original regular expression.

impl Display for Error

impl Display for Error

impl Display for Ast

Print a display representation of this Ast.

This does not preserve any of the original whitespace formatting that may have originally been present in the concrete syntax from which this Ast was generated.

This implementation uses constant stack space and heap space proportional to the size of the Ast.

impl Display for Hir

Print a display representation of this Hir.

The result of this is a valid regular expression pattern string.

This implementation uses constant stack space and heap space proportional to the size of the Hir.

impl Display for ErrorKind

impl Display for UnicodeWordError

impl Display for ErrorKind

impl Display for Error

impl Display for CaseFoldError

impl Display for Error

impl Display for Error

impl Display for Trap

impl Display for Error

impl Display for ValueType

impl Display for Instruction

impl Display for Error

impl Display for Error

impl<T> Display for Ratio<T> where
    T: Display + Eq + One
[src]

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

Renders as numer/denom. If denom=1, renders as numer.

impl Display for ParseRatioError[src]

impl Display for BigInt[src]

impl Display for ParseBigIntError[src]

impl Display for BigUint[src]

impl Display for ParseFloatError[src]

impl Display for H512

impl Display for U256

impl Display for U128

impl Display for U512

impl Display for H160

impl Display for H256

impl Display for FromHexError

impl Display for FromDecStrErr

impl Display for Error[src]

impl Display for InvalidKeyLength

impl Display for MacError

impl Display for SignatureError

impl Display for MultiSignatureStage

impl Display for ErrorKind

impl Display for Mnemonic

impl Display for MnemonicType

impl Display for Error

impl<T> Display for SyncFailure<T> where
    T: Display

impl<E> Display for Compat<E> where
    E: Display

impl<D> Display for Context<D> where
    D: 'static + Send + Sync + Display

impl Display for Backtrace

impl<'a> Display for SymbolName<'a>[src]

impl<'a> Display for BytesOrWideString<'a>[src]

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

impl Display for DwCfa

impl Display for DwCc

impl Display for DwLns

impl Display for DwInl

impl Display for DwEnd

impl Display for DwDsc

impl Display for DwAccess

impl Display for DwVirtuality

impl Display for DwDefaulted

impl Display for DwLang

impl Display for DwRle

impl Display for DwId

impl Display for DwEhPe

impl Display for DwTag

impl Display for Error

impl Display for DwMacro

impl Display for DwOp

impl Display for DwLle

impl Display for DwUt

impl Display for DwChildren

impl Display for DwForm

impl Display for DwOrd

impl Display for DwLne

impl Display for DwLnct

impl Display for DwAt

impl Display for DwAddr

impl Display for DwDs

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

impl Display for DwAte

impl Display for DwIdx

impl Display for DwVis

impl Display for Error

impl<'a, R, T> Display for RwLockReadGuard<'a, R, T> where
    R: 'a + RawRwLock,
    T: 'a + Display + ?Sized

impl<'a, R, G, T> Display for MappedReentrantMutexGuard<'a, R, G, T> where
    G: 'a + GetThreadId,
    R: 'a + RawMutex,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for MappedRwLockWriteGuard<'a, R, T> where
    R: 'a + RawRwLock,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for RwLockWriteGuard<'a, R, T> where
    R: 'a + RawRwLock,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for MutexGuard<'a, R, T> where
    R: 'a + RawMutex,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for MappedMutexGuard<'a, R, T> where
    R: 'a + RawMutex,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for RwLockUpgradableReadGuard<'a, R, T> where
    R: 'a + RawRwLockUpgrade,
    T: 'a + Display + ?Sized

impl<'a, R, T> Display for MappedRwLockReadGuard<'a, R, T> where
    R: 'a + RawRwLock,
    T: 'a + Display + ?Sized

impl<'a, R, G, T> Display for ReentrantMutexGuard<'a, R, G, T> where
    G: 'a + GetThreadId,
    R: 'a + RawMutex,
    T: 'a + Display + ?Sized

impl<I> Display for Decompositions<I> where
    I: Clone + Iterator<Item = char>, 

impl<I> Display for Recompositions<I> where
    I: Clone + Iterator<Item = char>, 

impl<A> Display for TinyVec<A> where
    A: Array,
    <A as Array>::Item: Display

impl<A> Display for ArrayVec<A> where
    A: Array,
    <A as Array>::Item: Display

impl Display for Error

impl Display for FromHexError[src]

impl Display for Aborted[src]

impl<T, Item> Display for ReuniteError<T, Item>[src]

impl<T> Display for ReuniteError<T>[src]

impl Display for SpawnError[src]

impl Display for Canceled[src]

impl Display for SendError[src]

impl Display for TryRecvError[src]

impl<T> Display for TrySendError<T>[src]

impl Display for EnterError[src]

impl Display for ExecutionError[src]

impl Display for Error

impl<HO, CE> Display for Error<HO, CE> where
    CE: Error,
    HO: Debug

impl<T, E> Display for TrieError<T, E> where
    E: MaybeDebug,
    T: MaybeDebug, 

impl<'a, I, F> Display for FormatWith<'a, I, F> where
    F: FnMut(<I as Iterator>::Item, &mut dyn FnMut(&dyn Display)) -> Result<(), Error>,
    I: Iterator
[src]

impl<'a, I> Display for Format<'a, I> where
    I: Iterator,
    <I as Iterator>::Item: Display
[src]

impl<L, R> Display for Either<L, R> where
    L: Display,
    R: Display
[src]

impl Display for RuntimeString[src]

impl<Block> Display for BlockId<Block> where
    Block: Block
[src]

impl Display for MultiSigner[src]

impl Display for Public

impl Display for Public

impl Display for Public

impl Display for FixedI64[src]

impl Display for FixedI128[src]

impl Display for FixedU128[src]

impl Display for Error[src]

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Implementors

impl Display for frame_support::dispatch::fmt::Error[src]

impl<'_> Display for Arguments<'_>[src]

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