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 Display for Backtrace[src]

impl Display for RecvError[src]

impl Display for Ipv6Addr[src]

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

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

impl Display for RecvTimeoutError[src]

impl Display for NulError[src]

impl Display for Error[src]

impl Display for StripPrefixError[src]

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

impl Display for IntoStringError[src]

impl Display for AddrParseError[src]

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

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

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

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

impl Display for ExitStatus[src]

impl Display for SocketAddrV4[src]

impl Display for Ipv4Addr[src]

impl Display for FromVecWithNulError[src]

impl Display for VarError[src]

impl Display for FromBytesWithNulError[src]

impl Display for SocketAddr[src]

impl Display for IpAddr[src]

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

impl Display for SocketAddrV6[src]

impl Display for SystemTimeError[src]

impl Display for AccessError[src]

impl Display for TryRecvError[src]

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

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

impl Display for JoinPathsError[src]

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

impl Display for ParseBoolError[src]

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

impl Display for i8[src]

impl Display for NonZeroI64[src]

impl Display for NonZeroU8[src]

impl Display for NonZeroU16[src]

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

impl Display for EscapeUnicode[src]

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

impl Display for i32[src]

impl Display for Utf8Lossy[src]

impl Display for NonZeroU64[src]

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

impl Display for BorrowMutError[src]

impl Display for CharTryFromError[src]

impl Display for u8[src]

impl Display for char[src]

impl Display for ![src]

impl Display for i128[src]

impl Display for i64[src]

impl Display for ParseCharError[src]

impl Display for ToLowercase[src]

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

impl Display for NonZeroU128[src]

impl Display for isize[src]

impl Display for u64[src]

impl Display for Utf8Error[src]

impl Display for EscapeDebug[src]

impl Display for usize[src]

impl Display for u128[src]

impl Display for f64[src]

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

impl Display for ParseIntError[src]

impl Display for bool[src]

impl Display for u16[src]

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

impl Display for BorrowError[src]

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

impl Display for NonZeroUsize[src]

impl Display for LayoutErr[src]

impl Display for NonZeroI32[src]

impl Display for NonZeroI8[src]

impl Display for NonZeroI128[src]

impl Display for ParseFloatError[src]

impl Display for NonZeroI16[src]

impl Display for str[src]

impl Display for u32[src]

impl Display for ToUppercase[src]

impl Display for EscapeDefault[src]

impl Display for Infallible[src]

impl Display for EscapeDefault[src]

impl Display for NonZeroU32[src]

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

impl Display for TryFromIntError[src]

impl Display for NonZeroIsize[src]

impl Display for f32[src]

impl Display for TryFromSliceError[src]

impl Display for DecodeUtf16Error[src]

impl Display for AllocErr[src]

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

impl Display for i16[src]

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

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

impl Display for FromUtf16Error[src]

impl Display for TryReserveError[src]

impl Display for FromUtf8Error[src]

impl Display for String[src]

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

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

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

impl Display for DwEhPe[src]

impl Display for DwLne[src]

impl Display for DwId[src]

impl Display for DwAddr[src]

impl Display for Error[src]

impl Display for DwMacro[src]

impl Display for DwLns[src]

impl Display for DwTag[src]

impl Display for DwCc[src]

impl Display for DwLle[src]

impl Display for DwForm[src]

impl Display for DwOrd[src]

impl Display for DwChildren[src]

impl Display for DwDefaulted[src]

impl Display for DwAt[src]

impl Display for DwInl[src]

impl Display for DwOp[src]

impl Display for DwAte[src]

impl Display for DwRle[src]

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

impl Display for DwUt[src]

impl Display for DwLang[src]

impl Display for DwLnct[src]

impl Display for DwDs[src]

impl Display for DwVirtuality[src]

impl Display for DwIdx[src]

impl Display for DwDsc[src]

impl Display for DwAccess[src]

impl Display for DwVis[src]

impl Display for DwCfa[src]

impl Display for DwEnd[src]

impl Display for Error[src]

impl Display for FieldSet[src]

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

impl Display for SetGlobalDefaultError[src]

impl Display for Field[src]

impl Display for ParseLevelError[src]

impl Display for Level[src]

impl Display for LevelFilter[src]

impl Display for SetLoggerError[src]

impl Display for Level[src]

impl Display for ParseLevelError[src]

impl Display for Error[src]

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

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

impl Display for Error[src]

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

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

impl Display for Error[src]

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

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

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

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

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

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

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

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

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

impl Display for ExecutionError[src]

impl Display for Error[src]

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

impl Display for CryptoTypePublicPair[src]

impl Display for Ss58AddressFormat[src]

impl Display for CodeNotFound[src]

impl Display for Public[src]

impl Display for Public[src]

impl Display for AccountId32[src]

impl Display for Public[src]

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

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

impl Display for InvalidOutputSize[src]

impl Display for BernoulliError[src]

impl Display for WeightedError[src]

impl Display for ReadError[src]

impl Display for Error[src]

impl Display for Error[src]

impl Display for Regex[src]

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

Shows the original regular expression.

impl Display for Regex[src]

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

Shows the original regular expression.

impl Display for Error[src]

impl Display for Error[src]

impl Display for ErrorKind[src]

impl Display for Ast[src]

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 CaseFoldError[src]

impl Display for UnicodeWordError[src]

impl Display for Error[src]

impl Display for Error[src]

impl Display for Error[src]

impl Display for Hir[src]

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[src]

impl Display for Trap[src]

impl Display for Error[src]

impl Display for ValueType[src]

impl Display for Error[src]

impl Display for Instruction[src]

impl Display for Error[src]

impl Display for Error[src]

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 ParseBigIntError[src]

impl Display for BigUint[src]

impl Display for BigInt[src]

impl Display for ParseFloatError[src]

impl Display for H256[src]

impl Display for U512[src]

impl Display for H160[src]

impl Display for U128[src]

impl Display for U256[src]

impl Display for H512[src]

impl Display for FromHexError[src]

impl Display for FromDecStrErr[src]

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

impl Display for DecoderError[src]

impl Display for MacError[src]

impl Display for InvalidKeyLength[src]

impl Display for SignatureError[src]

impl Display for MultiSignatureStage[src]

impl Display for Mnemonic[src]

impl Display for MnemonicType[src]

impl Display for ErrorKind[src]

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

impl Display for Error[src]

impl Display for Backtrace[src]

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

impl<E> Display for Compat<E> where
    E: Display
[src]

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

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

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

impl Display for DwInl[src]

impl Display for DwLns[src]

impl Display for DwDefaulted[src]

impl Display for DwVis[src]

impl Display for DwTag[src]

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

impl Display for DwForm[src]

impl Display for DwVirtuality[src]

impl Display for DwCc[src]

impl Display for DwMacro[src]

impl Display for DwLang[src]

impl Display for DwChildren[src]

impl Display for DwDsc[src]

impl Display for DwEhPe[src]

impl Display for DwLnct[src]

impl Display for DwEnd[src]

impl Display for DwUt[src]

impl Display for DwIdx[src]

impl Display for DwCfa[src]

impl Display for DwRle[src]

impl Display for Error[src]

impl Display for DwOrd[src]

impl Display for DwLle[src]

impl Display for DwDs[src]

impl Display for DwLne[src]

impl Display for DwAccess[src]

impl Display for DwAddr[src]

impl Display for DwAte[src]

impl Display for DwId[src]

impl Display for DwAt[src]

impl Display for DwOp[src]

impl Display for Error[src]

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

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

impl Display for Error[src]

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

impl Display for Aborted[src]

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

impl Display for SpawnError[src]

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

impl Display for Canceled[src]

impl Display for SendError[src]

impl Display for TryRecvError[src]

impl Display for EnterError[src]

impl Display for FromHexError[src]

impl Display for SignatureError[src]

impl Display for Error[src]

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

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

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

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

impl Display for MultiSigner[src]

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

impl Display for RuntimeString[src]

impl Display for Public[src]

impl Display for Public[src]

impl Display for Public[src]

impl Display for FixedI128[src]

impl Display for FixedI64[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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