1.0.0[−][src]Trait frame_support::dispatch::fmt::Display
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, }));
Implementations on Foreign Types
impl Display for SocketAddr
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impl<T> Display for SendError<T>
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impl Display for ExitStatus
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impl Display for Backtrace
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impl Display for Error
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impl<W> Display for IntoInnerError<W>
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impl<'_> Display for Display<'_>
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impl Display for JoinPathsError
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impl Display for Ipv6Addr
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impl<T> Display for TrySendError<T>
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impl Display for AddrParseError
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impl<'_, T> Display for RwLockWriteGuard<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T> Display for TryLockError<T>
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impl Display for RecvError
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impl Display for FromBytesWithNulError
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impl<T> Display for PoisonError<T>
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impl Display for IpAddr
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impl Display for IntoStringError
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impl Display for SystemTimeError
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impl Display for SocketAddrV4
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impl Display for RecvTimeoutError
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impl Display for SocketAddrV6
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impl Display for AccessError
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impl Display for StripPrefixError
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impl Display for TryRecvError
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impl<'_, T> Display for MutexGuard<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for Ipv4Addr
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impl Display for VarError
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impl Display for NulError
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impl<'_, T> Display for RwLockReadGuard<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for u128
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impl Display for ParseFloatError
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impl<'_, T> Display for &'_ T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for NonZeroUsize
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impl Display for i32
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impl Display for BorrowMutError
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impl Display for str
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impl Display for NonZeroU128
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impl<'a> Display for EscapeDefault<'a>
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impl Display for EscapeDebug
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impl Display for Utf8Error
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impl Display for bool
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impl Display for f32
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impl Display for NonZeroI64
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impl<'a> Display for EscapeDebug<'a>
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impl Display for NonZeroI128
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impl<T> Display for Wrapping<T> where
T: Display,
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T: Display,
impl Display for !
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impl Display for ParseCharError
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impl Display for NonZeroIsize
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impl Display for u32
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impl Display for NonZeroU8
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impl Display for u64
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impl Display for usize
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impl<'_, T> Display for RefMut<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for CharTryFromError
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impl Display for TryFromSliceError
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impl Display for u16
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impl Display for i64
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impl Display for BorrowError
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impl Display for i16
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impl<'_, T> Display for Ref<'_, T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<'_, T> Display for &'_ mut T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for f64
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impl Display for NonZeroI16
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impl Display for NonZeroU32
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impl<'_> Display for Location<'_>
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impl Display for ToUppercase
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impl<'_> Display for PanicInfo<'_>
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impl Display for Utf8Lossy
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impl Display for i128
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impl Display for NonZeroI32
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impl Display for DecodeUtf16Error
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impl Display for NonZeroU16
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impl Display for ToLowercase
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impl Display for char
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impl Display for NonZeroI8
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impl Display for AllocErr
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impl Display for u8
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impl Display for NonZeroU64
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impl Display for isize
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impl<'a> Display for EscapeUnicode<'a>
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impl Display for ParseBoolError
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impl<P> Display for Pin<P> where
P: Display,
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P: Display,
impl Display for EscapeDefault
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impl Display for TryFromIntError
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impl Display for EscapeDefault
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impl Display for ParseIntError
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impl Display for i8
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impl Display for EscapeUnicode
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impl Display for LayoutErr
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impl Display for Infallible
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impl<T> Display for Box<T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T> Display for Rc<T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for FromUtf8Error
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impl Display for FromUtf16Error
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impl Display for String
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impl<T> Display for Arc<T> where
T: Display + ?Sized,
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T: Display + ?Sized,
impl Display for TryReserveError
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impl<'_, B> Display for Cow<'_, B> where
B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,
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B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,
impl<'a> Display for SymbolName<'a>
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impl<'a> Display for Demangle<'a>
impl<'a> Display for ValueSet<'a>
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impl Display for SetGlobalDefaultError
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impl Display for Field
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impl Display for Level
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impl Display for ParseLevelError
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impl Display for FieldSet
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impl<'a> Display for Unexpected<'a>
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impl<'a> Display for dyn Expected + 'a
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impl Display for Error
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impl Display for Error
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impl<A> Display for ArrayString<A> where
A: Array<Item = u8> + Copy,
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A: Array<Item = u8> + Copy,
impl<T> Display for CapacityError<T>
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impl Display for Error
impl<'a, R, T> Display for RwLockWriteGuard<'a, R, T> where
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
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,
R: 'a + RawRwLockUpgrade,
T: 'a + Display + ?Sized,
impl<'a, R, T> Display for MappedMutexGuard<'a, R, T> where
R: 'a + RawMutex,
T: 'a + Display + ?Sized,
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,
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,
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,
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,
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,
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,
R: 'a + RawRwLock,
T: 'a + Display + ?Sized,
impl Display for ExecutionError
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impl Display for Level
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impl Display for SetLoggerError
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impl Display for ParseLevelError
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impl Display for LevelFilter
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impl Display for AccountId32
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impl<'a> Display for HexDisplay<'a>
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impl Display for Public
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impl Display for Public
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impl Display for Public
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impl Display for CodeNotFound
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impl<A> Display for ArrayString<A> where
A: Array<Item = u8>,
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A: Array<Item = u8>,
impl<T> Display for CapacityError<T>
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impl Display for InvalidOutputSize
impl Display for WeightedError
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impl Display for ReadError
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impl Display for BernoulliError
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impl Display for Error
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impl Display for Error
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impl Display for Regex
impl Display for Error
impl Display for Regex
impl Display for Error
impl Display for ErrorKind
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 CaseFoldError
impl Display for UnicodeWordError
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 ErrorKind
impl Display for Error
impl Display for Trap
impl Display for Error
impl Display for ValueType
impl Display for Error
impl Display for Instruction
impl Display for Error
impl Display for Error
impl Display for ParseRatioError
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impl<T> Display for Ratio<T> where
T: Display + Eq + One,
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T: Display + Eq + One,
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>
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Renders as numer/denom
. If denom=1, renders as numer.
impl Display for ParseBigIntError
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impl Display for BigUint
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impl Display for BigInt
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impl Display for ParseFloatError
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impl Display for U128
impl Display for H512
impl Display for H160
impl Display for H256
impl Display for U512
impl Display for U256
impl Display for FromHexError
impl Display for InvalidKeyLength
impl Display for MacError
impl Display for SignatureError
impl Display for MultiSignatureStage
impl Display for MnemonicType
impl Display for Mnemonic
impl Display for ErrorKind
impl Display for Backtrace
impl<D> Display for Context<D> where
D: 'static + Send + Sync + Display,
D: 'static + Send + Sync + Display,
impl<T> Display for SyncFailure<T> where
T: Display,
T: Display,
impl Display for Error
impl<E> Display for Compat<E> where
E: Display,
E: Display,
impl<'a> Display for BytesOrWideString<'a>
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impl<'a> Display for SymbolName<'a>
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impl<'a> Display for Demangle<'a>
impl<I> Display for Recompositions<I> where
I: Clone + Iterator<Item = char>,
I: Clone + Iterator<Item = char>,
impl<I> Display for Decompositions<I> where
I: Clone + Iterator<Item = char>,
I: Clone + Iterator<Item = char>,
impl Display for Error
impl Display for Aborted
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impl<T, Item> Display for ReuniteError<T, Item>
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impl Display for SpawnError
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impl<T> Display for TrySendError<T>
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impl Display for TryRecvError
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impl Display for Canceled
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impl Display for SendError
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impl Display for EnterError
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impl Display for FromHexError
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impl Display for SignatureError
impl Display for Error
impl<HO, CE> Display for Error<HO, CE> where
CE: Error,
HO: Debug,
CE: Error,
HO: Debug,
impl<T, E> Display for TrieError<T, E> where
E: MaybeDebug,
T: MaybeDebug,
E: MaybeDebug,
T: MaybeDebug,
impl Display for RuntimeString
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impl<Block> Display for BlockId<Block> where
Block: Block,
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Block: Block,