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 Ipv6Addr[src]

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

impl Display for SystemTimeError[src]

impl Display for AddrParseError[src]

impl Display for Backtrace[src]

impl Display for ExitStatus[src]

impl Display for Error[src]

impl Display for SocketAddr[src]

impl Display for VarError[src]

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

impl Display for JoinPathsError[src]

impl Display for IpAddr[src]

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

impl Display for IntoStringError[src]

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

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

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

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

impl Display for RecvError[src]

impl Display for SocketAddrV6[src]

impl Display for StripPrefixError[src]

impl Display for Ipv4Addr[src]

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

impl Display for SocketAddrV4[src]

impl Display for RecvTimeoutError[src]

impl Display for FromBytesWithNulError[src]

impl Display for NulError[src]

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

impl Display for AccessError[src]

impl Display for TryRecvError[src]

impl Display for ParseCharError[src]

impl Display for Utf8Error[src]

impl Display for bool[src]

impl Display for u128[src]

impl Display for NonZeroI32[src]

impl Display for ToUppercase[src]

impl Display for ToLowercase[src]

impl Display for f64[src]

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

impl Display for str[src]

impl Display for BorrowError[src]

impl Display for LayoutErr[src]

impl Display for usize[src]

impl Display for ParseBoolError[src]

impl Display for EscapeUnicode[src]

impl Display for i128[src]

impl Display for NonZeroI128[src]

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

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

impl Display for EscapeDefault[src]

impl Display for u16[src]

impl Display for u32[src]

impl Display for DecodeUtf16Error[src]

impl Display for NonZeroI16[src]

impl Display for f32[src]

impl Display for NonZeroUsize[src]

impl Display for i8[src]

impl Display for Utf8Lossy[src]

impl Display for isize[src]

impl Display for i16[src]

impl Display for NonZeroI8[src]

impl Display for u64[src]

impl Display for i32[src]

impl Display for NonZeroU16[src]

impl Display for NonZeroU32[src]

impl Display for Infallible[src]

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

impl Display for TryFromSliceError[src]

impl Display for BorrowMutError[src]

impl Display for NonZeroU8[src]

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

impl Display for NonZeroU128[src]

impl Display for EscapeDefault[src]

impl Display for u8[src]

impl Display for EscapeDebug[src]

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

impl Display for TryFromIntError[src]

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

impl Display for CharTryFromError[src]

impl Display for i64[src]

impl Display for char[src]

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

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

impl Display for AllocErr[src]

impl Display for ![src]

impl Display for NonZeroI64[src]

impl Display for NonZeroU64[src]

impl Display for ParseIntError[src]

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

impl Display for NonZeroIsize[src]

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

impl Display for ParseFloatError[src]

impl Display for FromUtf8Error[src]

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

impl Display for TryReserveError[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 Display for String[src]

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

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

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

impl Display for ParseLevelError[src]

impl Display for SetGlobalDefaultError[src]

impl Display for FieldSet[src]

impl Display for Field[src]

impl Display for Level[src]

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

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

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

impl Display for Error[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

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

impl Display for ExecutionError[src]

impl Display for Level[src]

impl Display for SetLoggerError[src]

impl Display for LevelFilter[src]

impl Display for ParseLevelError[src]

impl Display for Public[src]

impl Display for CryptoTypePublicPair[src]

impl Display for CodeNotFound[src]

impl Display for AccountId32[src]

impl Display for Public[src]

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

impl Display for Public[src]

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

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

impl Display for InvalidOutputSize

impl Display for ReadError[src]

impl Display for BernoulliError[src]

impl Display for WeightedError[src]

impl Display for Error[src]

impl Display for Error[src]

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 Error

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 UnicodeWordError

impl Display for ErrorKind

impl Display for ErrorKind

impl Display for CaseFoldError

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 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 BigUint[src]

impl Display for ParseBigIntError[src]

impl Display for ParseFloatError[src]

impl Display for H160

impl Display for H512

impl Display for H256

impl Display for U128

impl Display for U512

impl Display for U256

impl Display for FromHexError

impl Display for MacError

impl Display for InvalidKeyLength

impl Display for MultiSignatureStage

impl Display for SignatureError

impl Display for ErrorKind

impl Display for Mnemonic

impl Display for MnemonicType

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

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

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

impl Display for Error

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

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

impl Display for Error

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

impl Display for Aborted[src]

impl Display for SpawnError[src]

impl Display for SendError[src]

impl Display for TryRecvError[src]

impl Display for Canceled[src]

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

impl Display for EnterError[src]

impl Display for FromHexError[src]

impl Display for SignatureError

impl Display for Error

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

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

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 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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